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149-419: BattleTech is a wargaming and military science fiction franchise launched by FASA Corporation in 1984, acquired by WizKids in 2001, which was in turn acquired by Topps in 2003; and published since 2007 by Catalyst Game Labs . The trademark is currently owned by Topps and, for video games, Microsoft Gaming ; Catalyst Game Studios licenses the franchise from Topps. The series began with FASA's debut of

298-433: A carburetor or fuel injection as port injection or direct injection . Most SI engines have a single spark plug per cylinder but some have 2 . A head gasket prevents the gas from leaking between the cylinder head and the engine block. The opening and closing of the valves is controlled by one or several camshafts and springs—or in some engines—a desmodromic mechanism that uses no springs. The camshaft may press directly

447-409: A deflector head . Pistons are open at the bottom and hollow except for an integral reinforcement structure (the piston web). When an engine is working, the gas pressure in the combustion chamber exerts a force on the piston crown which is transferred through its web to a gudgeon pin . Each piston has rings fitted around its circumference that mostly prevent the gases from leaking into the crankcase or

596-428: A gas engine . Also in 1794, Robert Street patented an internal combustion engine, which was also the first to use liquid fuel , and built an engine around that time. In 1798, John Stevens built the first American internal combustion engine. In 1807, French engineers Nicéphore Niépce (who went on to invent photography ) and Claude Niépce ran a prototype internal combustion engine, using controlled dust explosions,

745-470: A locomotive operated by electricity.) In boating, an internal combustion engine that is installed in the hull is referred to as an engine, but the engines that sit on the transom are referred to as motors. Reciprocating piston engines are by far the most common power source for land and water vehicles , including automobiles , motorcycles , ships and to a lesser extent, locomotives (some are electrical but most use diesel engines ). Rotary engines of

894-594: A battery and charging system; nevertheless, this system is secondary and is added by manufacturers as a luxury for the ease of starting, turning fuel on and off (which can also be done via a switch or mechanical apparatus), and for running auxiliary electrical components and accessories. Most new engines rely on electrical and electronic engine control units (ECU) that also adjust the combustion process to increase efficiency and reduce emissions. Surfaces in contact and relative motion to other surfaces require lubrication to reduce wear, noise and increase efficiency by reducing

1043-404: A carefully timed high-voltage to the proper cylinder. This spark, via the spark plug, ignites the air-fuel mixture in the engine's cylinders. While gasoline internal combustion engines are much easier to start in cold weather than diesel engines, they can still have cold weather starting problems under extreme conditions. For years, the solution was to park the car in heated areas. In some parts of

1192-499: A common power source for lawnmowers , string trimmers , chain saws , leafblowers , pressure washers , snowmobiles , jet skis , outboard motors , mopeds , and motorcycles . There are several possible ways to classify internal combustion engines. By number of strokes: By type of ignition: By mechanical/thermodynamic cycle (these cycles are infrequently used but are commonly found in hybrid vehicles , along with other vehicles manufactured for fuel efficiency ): The base of

1341-426: A dial in its base. BattleMechs, the hulking flagship units of the franchise, made a natural subject for computer emulation, and so in 1988 Infocom released a PC/Commodore 64/Amiga based RPG called BattleTech: The Crescent Hawk's Inception . It was later followed up with a sequel, BattleTech: The Crescent Hawk's Revenge in 1990. Both games were reasonably well received, although aside from storyline continuity

1490-452: A hand crank. Larger engines typically power their starting motors and ignition systems using the electrical energy stored in a lead–acid battery . The battery's charged state is maintained by an automotive alternator or (previously) a generator which uses engine power to create electrical energy storage. The battery supplies electrical power for starting when the engine has a starting motor system, and supplies electrical power when

1639-540: A larger board position, providing an extremely abstract strategic model in which the determinant of victory is a generalisation of territorial control and influence projection. Contrarily, in wargames counters typically represent decidedly more concrete and internally quite complex entities (companies, battalions, etc.), with detailed interior state (stat blocks and tables of troop numbers, equipment, operational readiness, artillery charts, etc.), often with convoluted rules governing how they operate and interact, and furthermore

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1788-408: A lot of wargaming experience (it is usually considered a hardcore hobby), so learning a complicated new wargame is easy if it is similar enough to ones they've already played. By contrast, military officers typically have little or no wargaming experience. A second reason is that the technical data required to design an accurate and precise model, such as the performance characteristics of a fighter jet,

1937-449: A modern JVM , while the other three are Microsoft Windows programs. Wargames were played remotely through the mail, with players sending lists of moves, or orders, to each other through the mail. In some early PBM systems, six sided dice rolling was simulated by designating a specific stock and a future date and once that date passed, the players would determine an action's outcome using the sales in hundreds value for specific stocks on

2086-617: A player to find opponents with a computer game: a computer game can use artificial intelligence to provide a virtual opponent, or connect him to another human player over the Internet. For these reasons, computers are now the dominant medium for wargaming. In the recent years, programs have been developed for computer-assisted gaming as regards to wargaming. Two different categories can be distinguished: local computer assisted wargames and remote computer assisted wargames. Local computer assisted wargames are mostly not designed toward recreating

2235-408: A problem would occur as the compression ratio increased as the fuel was igniting due to the rise in temperature that resulted. Charles Kettering developed a lead additive which allowed higher compression ratios, which was progressively abandoned for automotive use from the 1970s onward, partly due to lead poisoning concerns. The fuel mixture is ignited at different progressions of the piston in

2384-480: A real historical era of warfare. Among recreational wargamers, the most popular historical era is World War 2. Professional military wargamers prefer the modern era. A fantasy setting depicts a fictional world in which the combatants wield fictional or anachronistic armaments, but it should be similar enough to some historical era of warfare such that the combatants fight in a familiar and credible way. For instance, Warhammer Age of Sigmar has wizards and dragons, but

2533-731: A reciprocating internal combustion engine is the engine block , which is typically made of cast iron (due to its good wear resistance and low cost) or aluminum . In the latter case, the cylinder liners are made of cast iron or steel, or a coating such as nikasil or alusil . The engine block contains the cylinders . In engines with more than one cylinder they are usually arranged either in 1 row ( straight engine ) or 2 rows ( boxer engine or V engine ); 3 or 4 rows are occasionally used ( W engine ) in contemporary engines, and other engine configurations are possible and have been used. Single-cylinder engines (or thumpers ) are common for motorcycles and other small engines found in light machinery. On

2682-410: A scale model of the battlefield. At the operational level , the scenario is a military campaign, and the basic unit of command is a large group of soldiers. At this level, the outcomes of battles are usually determined by a simple computation. At the strategic level , the scenario is an entire war. The player addresses higher-level concerns such as economics, research, and diplomacy. The time span of

2831-492: A science-fiction feudalistic Dark Age setting. The game was at first called Battledroids . The name of the game was changed to BattleTech in the second edition because George Lucas and Lucasfilm claimed the rights to the term " droid "; the machines themselves were renamed BattleMechs from the second edition onward. The game components included: Rather than create their own original robot art, FASA decided to use already-extant designs that had originally been created for

2980-422: A separate ICE as an auxiliary power unit . Wankel engines are fitted to many unmanned aerial vehicles . ICEs drive large electric generators that power electrical grids. They are found in the form of combustion turbines with a typical electrical output in the range of some 100 MW. Combined cycle power plants use the high temperature exhaust to boil and superheat water steam to run a steam turbine . Thus,

3129-481: A separate blower avoids many of the shortcomings of crankcase scavenging, at the expense of increased complexity which means a higher cost and an increase in maintenance requirement. An engine of this type uses ports or valves for intake and valves for exhaust, except opposed piston engines , which may also use ports for exhaust. The blower is usually of the Roots-type but other types have been used too. This design

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3278-416: A separate crankcase ventilation system. The cylinder head is attached to the engine block by numerous bolts or studs . It has several functions. The cylinder head seals the cylinders on the side opposite to the pistons; it contains short ducts (the ports ) for intake and exhaust and the associated intake valves that open to let the cylinder be filled with fresh air and exhaust valves that open to allow

3427-558: A specific date and then dividing the NYSE published sales in hundreds by six, using the remainder as the dice result. Nuclear Destruction , by the Flying Buffalo , was an early PBM game in 1970. Origins Award Hall-of-Fame member Middle-Earth Play-By-Mail is still active today. Reality Simulations, Inc. still runs a number of PBM games, such as Duel2 (formerly known as Duelmasters), Hyborian War , and Forgotten Realms: War of

3576-451: A tool and a chore, and players are often bluntly obliged to use whatever is provided to them. Professional wargames that are arbitrated by an umpire or the players themselves (manual wargames) tend to have simple models and computations compared to recreational wargames. Umpires may even be allowed to make arbitrary decisions using their own expertise. One reason for this is to keep the learning curve small. Recreational wargamers tend to have

3725-607: A variety of different Japanese anime , including Dougram , Crusher Joe , and Macross . The rights to these images were licensed from Twentieth Century Imports (TCI) . In later years, FASA abandoned these images as a result of a lawsuit brought against them by Playmates Toys and Harmony Gold over the use of said images. The anime-sourced BattleMechs continued to be referenced in-universe, but their images were no longer seen in new sourcebooks. This led them to be termed by fans as "the Unseen". When Fantasy Productions licensed

3874-500: A variety of weapons. Typically, these are represented on the game board by two-inch-tall miniature figurines that the players can paint to their own specifications, although older publications such as the 1st edition included small scale plastic models originally created for the Macross TV series, and the 2nd and 4th edition boxed sets included small cardboard pictures (front and back images) that were set in rubber bases to represent

4023-405: Is a fly-back system, using interruption of electrical primary system current through some type of synchronized interrupter. The interrupter can be either contact points or a power transistor. The problem with this type of ignition is that as RPM increases the availability of electrical energy decreases. This is especially a problem, since the amount of energy needed to ignite a more dense fuel mixture

4172-494: Is a look at the constant design and development of new types of tanks during World War II. The most successful card wargame (as a card game and as a wargame) would almost certainly be Up Front , a card game about tactical combat in World War II published by Avalon Hill in 1983. The abstractness is harnessed in the game by having the deck produce random terrain, and chances to fire, and the like, simulating uncertainty as to

4321-421: Is also why diesel and HCCI engines are more susceptible to cold-starting issues, although they run just as well in cold weather once started. Light duty diesel engines with indirect injection in automobiles and light trucks employ glowplugs (or other pre-heating: see Cummins ISB#6BT ) that pre-heat the combustion chamber just before starting to reduce no-start conditions in cold weather. Most diesels also have

4470-536: Is common terminology for a military's field training exercises to be referred to as "live wargames", but certain institutions such as the US Navy do not accept this. Likewise, activities like paintball and airsoft are often classified as combat sports . In contrast however the War Olympics also calls itself “the international army games” and often is referred to as wargaming colloquially. Modern wargaming

4619-503: Is commonplace in CI engines, and has been occasionally used in SI engines. CI engines that use a blower typically use uniflow scavenging . In this design the cylinder wall contains several intake ports placed uniformly spaced along the circumference just above the position that the piston crown reaches when at BDC. An exhaust valve or several like that of 4-stroke engines is used. The final part of

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4768-738: Is delivered to a working fluid not consisting of, mixed with, or contaminated by combustion products. Working fluids for external combustion engines include air, hot water, pressurized water or even boiler -heated liquid sodium . While there are many stationary applications, most ICEs are used in mobile applications and are the primary power supply for vehicles such as cars , aircraft and boats . ICEs are typically powered by hydrocarbon -based fuels like natural gas , gasoline , diesel fuel , or ethanol . Renewable fuels like biodiesel are used in compression ignition (CI) engines and bioethanol or ETBE (ethyl tert-butyl ether) produced from bioethanol in spark ignition (SI) engines. As early as 1900

4917-542: Is driven downward with power, it first uncovers the exhaust port where the burned fuel is expelled under high pressure and then the intake port where the process has been completed and will keep repeating. Later engines used a type of porting devised by the Deutz company to improve performance. It was called the Schnurle Reverse Flow system. DKW licensed this design for all their motorcycles. Their DKW RT 125

5066-422: Is generally blamed for the uneven advancement, the destruction of industry and institutes of learning over the centuries of warfare having resulted in the loss of much technology and knowledge. As rivalries and conflicts have dragged on, advanced technologies are redeveloped for the battlefield. Chicago-based FASA Corporation's original 1984 game focused on enormous robotic, semi-humanoid battle machines battling in

5215-415: Is held in place relative to the engine block by main bearings , which allow it to rotate. Bulkheads in the crankcase form a half of every main bearing; the other half is a detachable cap. In some cases a single main bearing deck is used rather than several smaller caps. A connecting rod is connected to offset sections of the crankshaft (the crankpins ) in one end and to the piston in the other end through

5364-406: Is higher. The result was often a high RPM misfire. Capacitor discharge ignition was developed. It produces a rising voltage that is sent to the spark plug. CD system voltages can reach 60,000 volts. CD ignitions use step-up transformers . The step-up transformer uses energy stored in a capacitance to generate electric spark . With either system, a mechanical or electrical control system provides

5513-615: Is identical to real-world history up until approximately 1984, when the reported histories begin to diverge; in particular, the game designers did not foresee the fall of the Soviet Union , which plays a major role past 1991 in the fictional BattleTech history. Individual lifestyles remain largely unchanged from those of modern times, due in part to stretches of protracted interplanetary warfare during which technological progress slowed or even reversed. Cultural, political and social conventions vary considerably between worlds, but feudalism

5662-403: Is longer than a sub-machine gun, due to the differing ammunitions) and thus preserve some verisimilitude, all the while compressing the battle to fit the confines of the table. Additionally, the ranges are multiples of 6, which makes them easier to remember. In real warfare, commanders have incomplete information about their enemy and the battlespace. A wargame that conceals some information from

5811-454: Is longer than most game tables. If model soldiers could shoot each other from opposite ends of the table, without the need to maneuver, the game would be very monotonous. For example, the miniature wargame Bolt Action solves this problem by reducing a rifle's range to 24 inches, a sub-machine gun's range to 12 inches, and a pistol's range to 6 inches. Even if these ranges are not realistic, their proportions make intuitive sense (a rifle's range

5960-445: Is not possible to dedicate a stroke exclusively for each of them. Starting at TDC the cycle consists of: While a 4-stroke engine uses the piston as a positive displacement pump to accomplish scavenging taking 2 of the 4 strokes, a 2-stroke engine uses the last part of the power stroke and the first part of the compression stroke for combined intake and exhaust. The work required to displace the charge and exhaust gases comes from either

6109-470: Is often classified. The exact definition of "wargame" varies from one writer to the next and one organization to the next. To prevent confusion, this section will establish the general definition employed by this article. A wargame must have a setting that is based on some historical era of warfare so as to establish what armaments, unit types, and doctrines the combatants may wield and the environment they fight in. A historical setting accurately depicts

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6258-460: Is sometimes tricky as they are typically used to simulate hypothetical future scenarios. Whereas the rules of chess are relatively simple, and those of Go even simpler, with the complexity of these games an emergent property of the evolving strategic state of the board, wargames contrarily tend to have very sophisticated rules as a matter of their commitment to representing the concrete realities of (various kinds of) warfare. Generally speaking,

6407-502: Is that the referee must be very knowledgeable in warfare and impartial, else they may issue unrealistic or unfair rulings. Another way to address complexity is to use a computer to automate some or all of the routine procedures. Video games can be both sophisticated and easy to learn, which is why computer wargames are more popular than tabletop wargames. Every wargame must have a sense of scale , so that it may realistically simulate how topography, distance, and time affect warfare. Scale

6556-514: Is the Wärtsilä-Sulzer RTA96-C turbocharged 2-stroke diesel, used in large container ships. It is the most efficient and powerful reciprocating internal combustion engine in the world with a thermal efficiency over 50%. For comparison, the most efficient small four-stroke engines are around 43% thermally-efficient (SAE 900648); size is an advantage for efficiency due to the increase in the ratio of volume to surface area. See

6705-414: Is usually expressed as a ratio, e.g. a scale of 1:1000 indicates that 1 cm on the game map represents 10 m (1,000 cm). In miniature wargaming, scale is more often expressed as the height of a model of a human measured from the base of its feet up to the eyes or top of the head (e.g. 28mm). Military wargames typically aim to model time and space as realistically as is feasible, so everything in

6854-597: Is widespread, with many states ruled by hereditary lords and other nobility, below which are numerous social classes. A key feature of the BattleTech universe is the absence of non-human intelligent life . Other than one or two isolated encounters in novels, mankind is the only sentient species. Above all, the central theme of BattleTech is conflict, consistent with the franchise's wargaming core. Interstellar and civil wars, planetary battles, factionalization and infighting, as well as institutionalized combat in

7003-454: The tactical level , the scenario is a single battle. The basic unit of command is an individual soldier or small group of soldiers. The time span of the scenario is in the order of minutes. At this level, the specific capabilities of the soldiers and their armaments are described in detail. An example of a tactical-level games is Flames of War , in which players use miniature figurines to represent individual soldiers, and move them around on

7152-649: The Fog of War is built into the game by representing units with upright wooden blocks that are marked on only one face, which is oriented towards the player who owns the block. The opponent cannot see the markings from his position. The first such block wargame was Quebec 1759 by Columbia Games (previously named Gamma Two Games), depicting the campaign surrounding the Battle of the Plains of Abraham. Because of their nature, cards are well suited for abstract games, as opposed to

7301-618: The Pyréolophore , which was granted a patent by Napoleon Bonaparte . This engine powered a boat on the Saône river in France. In the same year, Swiss engineer François Isaac de Rivaz invented a hydrogen-based internal combustion engine and powered the engine by electric spark. In 1808, De Rivaz fitted his invention to a primitive working vehicle – "the world's first internal combustion powered automobile". In 1823, Samuel Brown patented

7450-608: The Wankel rotary engine . A second class of internal combustion engines use continuous combustion: gas turbines , jet engines and most rocket engines , each of which are internal combustion engines on the same principle as previously described. ( Firearms are also a form of internal combustion engine, though of a type so specialized that they are commonly treated as a separate category, along with weaponry such as mortars and anti-aircraft cannons.) In contrast, in external combustion engines , such as steam or Stirling engines , energy

7599-594: The board game BattleTech (originally named Battledroids ) by Jordan Weisman and L. Ross Babcock III and has since grown to include numerous expansions to the original game , several board games, role playing games , video games, a collectible card game , a series of more than 100 novels , and an animated television series . In its most basic form, BattleTech is played on a map sheet composed of hexagonal terrain tiles. The combat units are roughly 12-metre-tall (39 ft) humanoid armored combat units called BattleMechs, powered by fusion reactors and armed with

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7748-473: The external links for an in-cylinder combustion video in a 2-stroke, optically accessible motorcycle engine. Dugald Clerk developed the first two-cycle engine in 1879. It used a separate cylinder which functioned as a pump in order to transfer the fuel mixture to the cylinder. In 1899 John Day simplified Clerk's design into the type of 2 cycle engine that is very widely used today. Day cycle engines are crankcase scavenged and port timed. The crankcase and

7897-418: The railgun . There are exceptions such as faster-than-light travel and communication, without which the setting cannot function. Radically advanced tech mixes with seemingly anachronistic technologies such as internal combustion engines and projectile weapons . Artificial intelligence , nanotechnology , androids , and many other staples of future fiction are generally absent or downplayed. Incessant warfare

8046-524: The "pod" ownership community continue to update the software and hardware for the Tesla II cockpits (e.g., by developing kits that allow to replace the original CRT monitors with modern LCD ones) for both private, commercial, and convention use. Wargaming There is ambiguity as to whether or not activities where participants physically perform mock combat actions (e.g. friendly warships firing dummy rounds at each other) are considered wargames. It

8195-407: The 1990s. A professional wargame is a wargame that is used by a military as a serious tool for training or research. A recreational wargame is one played for fun, often in a competitive context. Recreational wargames can cover a wide variety of subjects, from pre-historic to modern – even fantasy or sci-fi combat. Games which do not include modern armaments and tactics are of limited interest to

8344-516: The Avatars. Internal combustion engines An internal combustion engine ( ICE or IC engine ) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal combustion engine, the expansion of the high- temperature and high- pressure gases produced by combustion applies direct force to some component of

8493-581: The Combat Operations book). The Succession Wars is played on a political star map , with players trying to capture regions of space. Recent years have seen a trend of consolidating the expansions into "core products" for efficiency. Beginning under FanPro's aegis, then continued under Catalyst Game Labs, the various rulesets have been combined into a series of Core Rulebooks: After the FASA Corporation closed in 2000, Wizkids bought

8642-628: The Inner Sphere, ComStar, the Periphery states and the fallen Star League. FASA launched two additional systems to complement the core game: BattleTroops , an infantry combat system, and BattleForce , a large-scale combat simulator governing the actions of massed BattleTech units. The Succession Wars , a board game released in 1987, is one of only two purely strategic titles of the series (the other being "The Inner Sphere in Flames" from

8791-619: The Wankel design are used in some automobiles, aircraft and motorcycles. These are collectively known as internal-combustion-engine vehicles (ICEV). Where high power-to-weight ratios are required, internal combustion engines appear in the form of combustion turbines , or sometimes Wankel engines. Powered aircraft typically use an ICE which may be a reciprocating engine. Airplanes can instead use jet engines and helicopters can instead employ turboshafts ; both of which are types of turbines. In addition to providing propulsion, aircraft may employ

8940-489: The associated process. While an engine is in operation, the crankshaft rotates continuously at a nearly constant speed . In a 4-stroke ICE, each piston experiences 2 strokes per crankshaft revolution in the following order. Starting the description at TDC, these are: The defining characteristic of this kind of engine is that each piston completes a cycle every crankshaft revolution. The 4 processes of intake, compression, power and exhaust take place in only 2 strokes so that it

9089-617: The battlefield are represented by miniature models, as opposed to abstract pieces such as wooden blocks or plastic counters. Likewise, the battlefield itself is represented by model terrain, as opposed to a flat board or map; naval wargames are often played on a floor because they tend to require more space than a tabletop. Most miniature wargaming is recreational because issues of scale get in the way of realism. Miniature wargaming can be more expensive and time-consuming than other forms of wargaming. Furthermore, most manufacturers do not sell ready-to-play models, they sell boxes of model parts, which

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9238-413: The battlefield inside computer memory, but employing the computer to play the role of game master by storing game rules and unit characteristics, tracking unit status and positions or distances, animating the game with sounds and voice and resolving combat. Flow of play is simple: each turn, the units come up in a random order. Therefore, the more units an opponent has, the more chance he will be selected for

9387-407: The combat is mostly based on medieval warfare (spearmen, archers, knights, etc.). Some are also set in a hypothetical future or counterfactual past, to simulate, for example, a "World War Three" or rebellion of colonists on Mars. A wargame's scenario describes the circumstances of the specific conflict being simulated, from the layout of the terrain to the exact composition of the fighting forces to

9536-619: The combustion gases to escape. The valves are often poppet valves but they can also be rotary valves or sleeve valves . However, 2-stroke crankcase scavenged engines connect the gas ports directly to the cylinder wall without poppet valves; the piston controls their opening and occlusion instead. The cylinder head also holds the spark plug in the case of spark ignition engines and the injector for engines that use direct injection. All CI (compression ignition) engines use fuel injection, usually direct injection but some engines instead use indirect injection . SI (spark ignition) engines can use

9685-416: The company later released a statement noting that their primary troubles had been with finding a publisher, which eventually led to the announcement of a free-to-play reboot called Mechwarrior Online , set around the start of the clan invasions. The game was published in 2013 by Infinite Games Publishing, the same company which later published MechWarrior Tactics . IGP filed for bankruptcy and sold off

9834-530: The complexity also makes wargames difficult to enjoy, but some players enjoy high realism, so finding a balance between realism and simplicity is tricky when it comes to recreational wargames. One way to solve the problem of complexity is to use a referee who has the discretion to arbitrate events, using whatever tools and knowledge they deem fit. This solution is popular with military instructors because it allows them to apply their own expertise when they use wargames to instruct students. The drawback of this approach

9983-455: The compressed air and combustion products and slide continuously within it while the engine is in operation. In smaller engines, the pistons are made of aluminum; while in larger applications, they are typically made of cast iron. In performance applications, pistons can also be titanium or forged steel for greater strength. The top surface of the piston is called its crown and is typically flat or concave. Some two-stroke engines use pistons with

10132-432: The compressed charge, four-cycle engine. In 1879, Karl Benz patented a reliable two-stroke gasoline engine. Later, in 1886, Benz began the first commercial production of motor vehicles with an internal combustion engine, in which a three-wheeled, four-cycle engine and chassis formed a single unit. In 1892, Rudolf Diesel developed the first compressed charge, compression ignition engine. In 1926, Robert Goddard launched

10281-498: The concept of play-by-email gaming, however the presentation and actual capabilities are completely different. They have been designed to replicate the look and feel of existing board or miniatures wargames on the computer. The map and counters are presented to the user who can then manipulate these, more-or-less as if he were playing the physical game, and send a saved file off to his opponent, who can review what has been done without having to duplicate everything on his physical set-up of

10430-410: The corresponding ports. The intake manifold connects to the air filter directly, or to a carburetor when one is present, which is then connected to the air filter . It distributes the air incoming from these devices to the individual cylinders. The exhaust manifold is the first component in the exhaust system . It collects the exhaust gases from the cylinders and drives it to the following component in

10579-400: The crankcase or a separate blower. For scavenging, expulsion of burned gas and entry of fresh mix, two main approaches are described: Loop scavenging, and Uniflow scavenging. SAE news published in the 2010s that 'Loop Scavenging' is better under any circumstance than Uniflow Scavenging. Some SI engines are crankcase scavenged and do not use poppet valves. Instead, the crankcase and the part of

10728-401: The crankcase pressure is slightly below intake pressure, to let it be filled with a new charge; this happens when the piston is moving upwards. When the piston is moving downwards the pressure in the crankcase increases and the reed valve closes promptly, then the charge in the crankcase is compressed. When the piston is moving downwards, it also uncovers the exhaust port and the transfer port and

10877-413: The crankcase to the port in the cylinder to provide for intake and another from the exhaust port to the exhaust pipe. The height of the port in relationship to the length of the cylinder is called the "port timing". On the first upstroke of the engine there would be no fuel inducted into the cylinder as the crankcase was empty. On the downstroke, the piston now compresses the fuel mix, which has lubricated

11026-431: The cylinder below the piston is used as a pump. The intake port is connected to the crankcase through a reed valve or a rotary disk valve driven by the engine. For each cylinder, a transfer port connects in one end to the crankcase and in the other end to the cylinder wall. The exhaust port is connected directly to the cylinder wall. The transfer and exhaust port are opened and closed by the piston. The reed valve opens when

11175-411: The cylinder block has fins protruding away from it to cool the engine by directly transferring heat to the air. The cylinder walls are usually finished by honing to obtain a cross hatch , which is able to retain more oil. A too rough surface would quickly harm the engine by excessive wear on the piston. The pistons are short cylindrical parts which seal one end of the cylinder from the high pressure of

11324-407: The cylinder. Because there is no obstruction in the cylinder of the fuel to move directly out of the exhaust port prior to the piston rising far enough to close the port, early engines used a high domed piston to slow down the flow of fuel. Later the fuel was "resonated" back into the cylinder using an expansion chamber design. When the piston rose close to TDC, a spark ignited the fuel. As the piston

11473-414: The cylinder. At low rpm, the spark is timed to occur close to the piston achieving top dead center. In order to produce more power, as rpm rises the spark is advanced sooner during piston movement. The spark occurs while the fuel is still being compressed progressively more as rpm rises. The necessary high voltage, typically 10,000 volts, is supplied by an induction coil or transformer. The induction coil

11622-472: The deck is merely one of the most important elements of the game. The term "wargame" is rarely used in the video gaming hobby; the term "strategy game" is preferred. "Computer wargame" distinguishes a game from a "tabletop wargame". Computer wargames have many advantages over traditional wargames. In a computer game, all the routine procedures and calculations are automated. The player needs only to make strategic and tactical decisions. The learning curve for

11771-425: The designer will have to juggle their competing demands. This can lead to great complexity, high development costs, and a compromised product that satisfies nobody. Commercial wargames are under more pressure to deliver an enjoyable experience for the players, who expect a user-friendly interface, a reasonable learning curve, exciting gameplay, and so forth. By contrast, military organizations tend to see wargaming as

11920-437: The designers to acquire feedback. Consequently, errors in professional wargame models tend to persist. Although commercial wargame designers study consumer trends and listen to player feedback, their products are usually designed and sold with a take-it-or-leave-it approach. Professional wargames, by contrast, are typically commissioned by the military that plans to use them. If a wargame is commissioned by several clients, then

12069-413: The early engines which used Hot Tube ignition. When Bosch developed the magneto it became the primary system for producing electricity to energize a spark plug. Many small engines still use magneto ignition. Small engines are started by hand cranking using a recoil starter or hand crank. Prior to Charles F. Kettering of Delco's development of the automotive starter all gasoline engined automobiles used

12218-453: The efficiency is higher because more energy is extracted from the fuel than what could be extracted by the combustion engine alone. Combined cycle power plants achieve efficiencies in the range of 50–60%. In a smaller scale, stationary engines like gas engines or diesel generators are used for backup or for providing electrical power to areas not connected to an electric grid . Small engines (usually 2‐stroke gasoline/petrol engines) are

12367-450: The emphasis is on verisimilitude, i.e. the satisfactory appearance of realism. In any case, no wargame can be perfectly realistic. A wargame's design must make trade-offs between realism, playability, and fun, and function within the constraints of its medium. Fantasy wargames arguably stretch the definition of wargaming by representing fictional or anachronistic armaments, but they may still be called wargames if they resemble real warfare to

12516-543: The engine is off. The battery also supplies electrical power during rare run conditions where the alternator cannot maintain more than 13.8 volts (for a common 12 V automotive electrical system). As alternator voltage falls below 13.8 volts, the lead-acid storage battery increasingly picks up electrical load. During virtually all running conditions, including normal idle conditions, the alternator supplies primary electrical power. Some systems disable alternator field (rotor) power during wide-open throttle conditions. Disabling

12665-415: The engine. The force is typically applied to pistons ( piston engine ), turbine blades ( gas turbine ), a rotor (Wankel engine) , or a nozzle ( jet engine ). This force moves the component over a distance. This process transforms chemical energy into kinetic energy which is used to propel, move or power whatever the engine is attached to. The first commercially successful internal combustion engine

12814-435: The field reduces alternator pulley mechanical loading to nearly zero, maximizing crankshaft power. In this case, the battery supplies all primary electrical power. Gasoline engines take in a mixture of air and gasoline and compress it by the movement of the piston from bottom dead center to top dead center when the fuel is at maximum compression. The reduction in the size of the swept area of the cylinder and taking into account

12963-560: The first BattleTech Center at the North Pier Mall in Chicago. The BattleTech Center featured 16 networked, full-sized cockpits or "pods" that resembled a BattleMech cockpit with over 80 separate controls. Each player selected a 'Mech to pilot into combat against up to seven other human players in the other cockpits. Virtual World Entertainment, the company that managed the centers, later opened many other Virtual World centers around

13112-671: The first internal combustion engine to be applied industrially. In 1854, in the UK, the Italian inventors Eugenio Barsanti and Felice Matteucci obtained the certification: "Obtaining Motive Power by the Explosion of Gases". In 1857 the Great Seal Patent Office conceded them patent No.1655 for the invention of an "Improved Apparatus for Obtaining Motive Power from Gases". Barsanti and Matteucci obtained other patents for

13261-595: The first liquid-fueled rocket. In 1939, the Heinkel He 178 became the world's first jet aircraft . At one time, the word engine (via Old French , from Latin ingenium , "ability") meant any piece of machinery —a sense that persists in expressions such as siege engine . A "motor" (from Latin motor , "mover") is any machine that produces mechanical power . Traditionally, electric motors are not referred to as "engines"; however, combustion engines are often referred to as "motors". (An electric engine refers to

13410-604: The following conditions: The main advantage of 2-stroke engines of this type is mechanical simplicity and a higher power-to-weight ratio than their 4-stroke counterparts. Despite having twice as many power strokes per cycle, less than twice the power of a comparable 4-stroke engine is attainable in practice. In the US, 2-stroke engines were banned for road vehicles due to the pollution. Off-road only motorcycles are still often 2-stroke but are rarely road legal. However, many thousands of 2-stroke lawn maintenance engines are in use. Using

13559-400: The game is in the order of months or years. A wargame must simulate warfare to a reasonable degree of realism, though what counts as sufficient realism depends on the players. Military wargames need to be highly realistic because their purpose is to prepare officers for real warfare. Recreational wargames only need to be as realistic as it pleases the players, so in most recreational wargames

13708-429: The game, and respond. Some allow for both players to get on-line and see each other's moves in real-time. These systems are generally set up so that while one can play the game, the program has no knowledge of the rules, and cannot enforce them. The human players must have a knowledge of the rules themselves. The idea is to promote the playing of the games (by making play against a remote opponent easier), while supporting

13857-447: The global state of the game is often governed by extensive non-local rules representing exigencies like seasonal weather or supply lines. This makes wargames difficult to learn, as it can be difficult to simply begin playing without already understanding a great deal about how to do so. Even experienced wargamers usually play with their rulebook on hand, because the rules for most wargames are too complex to fully memorize. For many people,

14006-517: The gudgeon pin and thus transfers the force and translates the reciprocating motion of the pistons to the circular motion of the crankshaft. The end of the connecting rod attached to the gudgeon pin is called its small end, and the other end, where it is connected to the crankshaft, the big end. The big end has a detachable half to allow assembly around the crankshaft. It is kept together to the connecting rod by removable bolts. The cylinder head has an intake manifold and an exhaust manifold attached to

14155-505: The high temperature and pressure created by the engine in its compression process. The compression level that occurs is usually twice or more than a gasoline engine. Diesel engines take in air only, and shortly before peak compression, spray a small quantity of diesel fuel into the cylinder via a fuel injector that allows the fuel to instantly ignite. HCCI type engines take in both air and fuel, but continue to rely on an unaided auto-combustion process, due to higher pressures and temperature. This

14304-416: The higher pressure of the charge in the crankcase makes it enter the cylinder through the transfer port, blowing the exhaust gases. Lubrication is accomplished by adding two-stroke oil to the fuel in small ratios. Petroil refers to the mix of gasoline with the aforesaid oil. This kind of 2-stroke engine has a lower efficiency than comparable 4-strokes engines and releases more polluting exhaust gases for

14453-451: The highest thermal efficiencies among internal combustion engines of any kind. Some diesel–electric locomotive engines operate on the 2-stroke cycle. The most powerful of them have a brake power of around 4.5  MW or 6,000  HP . The EMD SD90MAC class of locomotives are an example of such. The comparable class GE AC6000CW , whose prime mover has almost the same brake power, uses a 4-stroke engine. An example of this type of engine

14602-521: The industry (and reducing copyright issues) by ensuring that the players have access to the actual physical game. The four main programs that can be used to play a number of games each are Aide de Camp , Cyberboard , Vassal and ZunTzu . Aide de Camp is available for purchase, while the other three are offered free. Vassal is in turn an outgrowth of the VASL (Virtual ASL ) project, and uses Java , making it accessible to any computer that can run

14751-491: The information he judges the players should know. Some recreational wargames use a referee too, often referring to them as "the GameMaster" (e.g. Warhammer 40,000: Rogue Trader ). The fog of war is easy to simulate in a computer wargame, as a virtual environment is free of the physical constraints of a tabletop game. The computer itself can serve as the referee. Miniature wargaming is a form of wargaming where units on

14900-419: The intake manifold is an air sleeve that feeds the intake ports. The intake ports are placed at a horizontal angle to the cylinder wall (I.e: they are in plane of the piston crown) to give a swirl to the incoming charge to improve combustion. The largest reciprocating IC are low speed CI engines of this type; they are used for marine propulsion (see marine diesel engine ) or electric power generation and achieve

15049-429: The inventor of the diesel engine, Rudolf Diesel , was using peanut oil to run his engines. Renewable fuels are commonly blended with fossil fuels. Hydrogen , which is rarely used, can be obtained from either fossil fuels or renewable energy. Various scientists and engineers contributed to the development of internal combustion engines. In 1791, John Barber developed the gas turbine . In 1794 Thomas Mead patented

15198-434: The large number of such pre-designed BattleMechs, vehicles, aerospace units and other military hardware, the creators also established a system of custom design rules, enabling players to generate their own units and field them in combat. In addition to game rule books, FASA published several background books detailing the history, political and social structures of various factions in the game, including all five Great Houses of

15347-516: The license from Topps. CGL continues to hold the license to this day; with the end of the MechWarrior: Dark Age miniatures game, the name of the traditional tabletop game has reverted to simply BattleTech . On June 24, 2009, Catalyst Game Labs announced that they had secured the rights to the "Unseen" art. As a result, art depicting the original 'Mechs could be legally used again. However, an update on August 11, 2009, stated that

15496-429: The local conditions (nature of the terrain, etc.). Dan Verssen Games is a specialist designer and publisher of card games for several genres, including air combat and World War II and modern land combat. Also, card driven games (CDGs), first introduced in 1993, use a deck of (custom) cards to drive most elements of the game, such as unit movement (activation) and random events. These are, however, distinctly board games,

15645-446: The mid 3100s. A detailed timeline stretching from the late 20th century to the mid-32nd describes humanity's technological, social and political development and spread through space both in broad historical terms and through accounts of the lives of individuals who experienced and shaped that history, with an emphasis on (initially) the year 3025 and creating an ongoing storyline from there. Generally, BattleTech assumes that its history

15794-422: The military, though wargames covering famous historical battles can interest military historians . As professional wargames are used to prepare officers for actual warfare, there is naturally a strong emphasis on realism and current events. Military organizations are typically secretive about their current wargames, and this makes designing a professional wargame a challenge. The data the designers require, such as

15943-543: The more realistic a wargame seeks to be, the more complicated its rules are. For example, chess pieces only have a few rules determining their behaviour, such as how and when they are allowed to move or capture based on their type and board location, providing a highly abstracted model of warfare which represents troop positioning and composition. Stones in Go have no properties, behaviours, or state on their own, and only potentially represent, relative to other stones, elements of

16092-448: The next turn. When a unit comes up, the commander specifies an order and if offensive action is being taken, a target, along with details about distance. The results of the order, base move distance and effect to target, are reported, and the unit is moved on the tabletop. All distance relationships are tracked on the tabletop. All record-keeping is tracked by the computer. Remote computer assisted wargames can be considered as extensions to

16241-407: The oil into the combustion chamber. A ventilation system drives the small amount of gas that escapes past the pistons during normal operation (the blow-by gases) out of the crankcase so that it does not accumulate contaminating the oil and creating corrosion. In two-stroke gasoline engines the crankcase is part of the air–fuel path and due to the continuous flow of it, two-stroke engines do not need

16390-530: The old editions." In the August 1997 edition of Dragon (Issue 238), Rick Swan reviewed FASA's fourth edition of BattleTech, and called it "A snap to learn... as exciting as it is addictive; there are few gaming experiences more satisfying than blasting giant robots into scrap metal." However, for people who already owned the third edition, Swan suggested that "there's no compelling reason to invest in version four." The BattleTech franchise first extended beyond

16539-402: The outer side of the cylinder, passages that contain cooling fluid are cast into the engine block whereas, in some heavy duty engines, the passages are the types of removable cylinder sleeves which can be replaceable. Water-cooled engines contain passages in the engine block where cooling fluid circulates (the water jacket ). Some small engines are air-cooled, and instead of having a water jacket

16688-460: The part of the cylinder below the exhaust port is used as a pump. The operation of the Day cycle engine begins when the crankshaft is turned so that the piston moves from BDC upward (toward the head) creating a vacuum in the crankcase/cylinder area. The carburetor then feeds the fuel mixture into the crankcase through a reed valve or a rotary disk valve (driven by the engine). There are cast in ducts from

16837-514: The part of the deal regarding designs that originated in images from Macross had fallen through, returning the original images to Unseen status once again. Since then, designs that originated in images from Dougram and Crusher Joe are no longer considered Unseen. In the March 1988 edition of Dragon (Issue 131), Jim Bambra called the first edition BattleTech tabletop game "a brilliantly conceived and presented game of robotic combat set in

16986-427: The path. The exhaust system of an ICE may also include a catalytic converter and muffler . The final section in the path of the exhaust gases is the tailpipe . The top dead center (TDC) of a piston is the position where it is nearest to the valves; bottom dead center (BDC) is the opposite position where it is furthest from them. A stroke is the movement of a piston from TDC to BDC or vice versa, together with

17135-496: The performance characteristics of weapons or the locations of military bases, are often classified, which makes it difficult for the designers to verify that their models are accurate. Secrecy also makes it harder to disseminate corrections if the wargame has already been delivered to the clients. Then there is the small player base. Whereas a commercial wargame might have thousands or even millions of players, professional wargames tend to have small player bases, which makes it harder for

17284-412: The piston in the cylinder and the bearings due to the fuel mix having oil added to it. As the piston moves downward it first uncovers the exhaust, but on the first stroke there is no burnt fuel to exhaust. As the piston moves downward further, it uncovers the intake port which has a duct that runs to the crankcase. Since the fuel mix in the crankcase is under pressure, the mix moves through the duct and into

17433-423: The player is called a closed game. An open wargame has no secret information. Most recreational wargames are open wargames. A closed wargame can simulate the espionage and reconnaissance aspects of war. Military wargames often use referees to manage secret information. The players may be forced to sit in separate rooms, and communicate their orders with the referee in the game room, who in turn reports back only

17582-434: The player is smaller, as the game can be played without mastering all its mechanics. The gameplay is faster, as a computer can process calculations much faster than a human. Computer wargames often have more sophisticated mechanics than traditional wargames thanks to automation. Computer games tend to be cheaper than traditional wargames because, being software, they can be copied and distributed very efficiently. It's easier for

17731-503: The players are expected to assemble and paint themselves. This requires skill, time, and money, but many players like the opportunity to show off their artistic skills. Miniature wargaming is often as much about artistry as it is about play. A board wargame is played on a board that has a more-or-less fixed layout and is supplied by the game's manufacturer. This is in contrast to customizable playing fields made with modular components, such as in miniature wargaming . In block wargaming ,

17880-402: The popular Magic: The Gathering . WizKids , owners of the BattleTech franchise after 2001, introduced a collectable miniatures-based variant of the classic tabletop game called MechWarrior: Dark Age in 2002 (later renamed MechWarrior: Age of Destruction ). The game incorporates WizKids' " Clix System ", a means of tracking the combat statistics and abilities of each figure by turning

18029-409: The power wasting in overcoming friction , or to make the mechanism work at all. Also, the lubricant used can reduce excess heat and provide additional cooling to components. At the very least, an engine requires lubrication in the following parts: In 2-stroke crankcase scavenged engines, the interior of the crankcase, and therefore the crankshaft, connecting rod and bottom of the pistons are sprayed by

18178-680: The property, these "Unseen" images were expanded to include all art produced "out-of-house" – that is, whose copyrights resided with the creators, not the company. Catalyst Game Labs has continued this practice. The game's popularity spawned several variants and expansions to the core system, including CityTech which fleshed out urban operations, infantry, and vehicle combat, AeroTech which focused on air and space-based operations, and BattleSpace which detailed large spacecraft combat. FASA also published numerous sourcebooks, known as Technical Readouts, which featured specifications for new combat units that players could select from. However, despite

18327-403: The release of a BattleTech game known as MechWarrior: Living Legends and the first public beta was released on December 26, 2009. A possible MechWarrior 5 was being produced, though it lingered in development for about a year and was eventually canceled. Originally, Smith & Tinker owned the BattleTech electronic rights, but, after failing to find funding for a new MechWarrior game,

18476-520: The rights in December 2014. Piranha Games continued work on MechWarrior 5: Mercenaries , was released as an Epic Games exclusive in December 2019. Piranha Games will be releasing a stand-alone sequel to MechWarrior 5: Mercenaries called MechWarrior 5: Clans on October 3, 2024. The franchise saw its first online-dedicated game with Multiplayer BattleTech: EGA in 1992, which was followed by Multiplayer Battletech: Solaris in 1996. 1994 saw

18625-621: The rights to the game in January 2001. They reworked the IP to launch their MechWarrior: Dark Age collectible miniatures game, but licensed the rights to continue to publish products for the old game to FanPro (itself a subsidiary of Fantasy Productions ). Topps bought Wizkids in 2003, but this did not change any publishing agreements at that time. FanPro held the license to the original tabletop game (which they rebranded as "Classic BattleTech") until 2007. At that point Catalyst Game Labs (CGL) acquired

18774-588: The rights to the series were bought by Piranha Games in 2011, who had originally been working with Smith & Tinker to create MechWarrior 5. On July 9, 2009, it was confirmed that the franchise would be rebooted. Further trailers were released and it was confirmed that the timeline would be set around 3015. Though it seemed that the legal troubles which originally plagued FASA due to the similarities between BattleTech mechs and those in Robotech/Macross had returned to cause some troubles for Piranha Games,

18923-406: The rules revisions "presenting the fundamentals in clear, simple language". Swan also admired the game's post-apocalyptic vision, calling it "one of the hobby's richest settings." He concluded with a recommendation to buy the third edition: "While the previous version was a class act ... the third edition stands as the definitive treatment, a handsome upgrade worth the purchase price even for owners of

19072-452: The same invention in France, Belgium and Piedmont between 1857 and 1859. In 1860, Belgian engineer Jean Joseph Etienne Lenoir produced a gas-fired internal combustion engine. In 1864, Nicolaus Otto patented the first atmospheric gas engine. In 1872, American George Brayton invented the first commercial liquid-fueled internal combustion engine. In 1876, Nicolaus Otto began working with Gottlieb Daimler and Wilhelm Maybach , patented

19221-416: The satisfaction of the players. For example, Warhammer Fantasy Battle has wizards and dragons, but the bulk of the armaments are taken from medieval warfare (spearmen, knights, archers, etc.). Validation is the process by which a given wargame is proven to be realistic. For historical wargames, this usually means being able to accurately recreate a certain historical battle. Validating military wargames

19370-427: The scenario is imbalanced and urge players to switch sides and play again to compare their performance. It is easier to design a balanced scenario where all players have a fair chance of winning if it is fictionalized. Board wargames usually have a fixed scenario. A wargame's level of war determines to the scope of the scenario, the basic unit of command, and the degree to which lower level processes are abstracted. At

19519-730: The second game held few similarities to its predecessor. The first pure simulation of BattleMech combat, however, was released for computers in 1989. Titled MechWarrior and published by Activision , the single-player game gave users the opportunity to pilot a range of Mechs and engage in combat against computer-controlled opponents. Sequels MechWarrior 2 (1995), MechWarrior 2: Mercenaries (1996), MechWarrior 3 (1999) and MechWarrior 4 (2000), and MechWarrior 4: Mercenaries (2002) created simulations of progressively higher technical sophistication. "Mekpaks" for MechWarrior 4: Mercenaries made by Mektek were released, adding new weapons, Mechs and graphics. A group also modded Crysis for

19668-818: The series' first console original title, the simply titled BattleTech for the Sega Genesis . Other notable titles include the MechCommander series for the PC ( MechCommander in 1998 and MechCommander 2 in 2001), the MechAssault series ( MechAssault and MechAssault 2: Lone Wolf in 2002 and 2004, respectively, for the Xbox , and MechAssault: Phantom War in 2006 for the Nintendo DS ). A new turn-based strategy game , simply titled BattleTech ,

19817-405: The shape of arena contests and duelling , form the grist of both novelized fiction and game backstories. The level of technology evident in BattleTech is an unusual blend of the highly futuristic and the nearly modern. The universe leans towards hard science fiction concepts. Much of the technology is either similar to that of the present day, or considered plausible in the near-future, such as

19966-451: The simulation aspects of wargames. Traditional card games are not considered wargames even when nominally about the same subject (such as the game War ). An early card wargame was Nuclear War , a 'tongue-in-cheek game of the end of the world', first published in 1966 and still published today by Flying Buffalo . It does not simulate how any actual nuclear exchange would happen, but it is still structured unlike most card games because of

20115-463: The simulation conforms to a single scale. Recreational wargame designers, by contrast, tend to use abstract scaling techniques to make their wargames easier to learn and play. Tabletop miniature wargames , for instance, cannot realistically model the range of modern firearms, because miniature wargaming models are typically built to a scale between 1:64 and 1:120. At those scales, riflemen should be able to shoot each other from several meters away, which

20264-400: The stem of the valve or may act upon a rocker arm , again, either directly or through a pushrod . The crankcase is sealed at the bottom with a sump that collects the falling oil during normal operation to be cycled again. The cavity created between the cylinder block and the sump houses a crankshaft that converts the reciprocating motion of the pistons to rotational motion. The crankshaft

20413-546: The tabletop wargame format with the release of MechWarrior , a role-playing game in which players portray BattleMech pilots or other characters in the 31st century. The RPG system has been republished in several editions and expanded by various sourcebooks and supplements. In 1996, FASA also introduced the BattleTech Collectible Card Game , a CCG developed by Wizards of the Coast , creators of

20562-465: The units. The game is played in turns, each of which represents 10 seconds of real time, with each turn composed of multiple phases. BattleTech' s fictional history covers the approximately 1,150 years from the end of the 20th century to the middle of the 32nd. Most works in the series are set during the early to middle decades of the 31st century, though a few publications concern earlier ages. MechWarrior: Dark Ages and its related novels take place in

20711-502: The victory conditions of the players. Historical wargames often re-enact historical battles. Alternatively, the game may provide fictional "what-if" scenarios. One challenge in the design of historical wargames is that the scenarios may be inherently unbalanced and present one side with an unwinnable situation. In such cases, the victory conditions may be adjusted for the disadvantaged side so that they can win simply by doing better than what happened historically. Some games simply concede that

20860-423: The volume of the combustion chamber is described by a ratio. Early engines had compression ratios of 6 to 1. As compression ratios were increased, the efficiency of the engine increased as well. With early induction and ignition systems the compression ratios had to be kept low. With advances in fuel technology and combustion management, high-performance engines can run reliably at 12:1 ratio. With low octane fuel,

21009-583: The war-torn universe of the Successor States", and complimented the high production values of the game components. Bambra concluded with a recommendation: "Try the Battletech game. If you like it, it might inspire you to form your own BattleMech unit and battle your way across the Successor States." In the June 1993 edition of Dragon (Issue 194), Rick Swan reviewed FASA's third edition and liked

21158-414: The way it deals with its subject. In the late 1970s Battleline Publications (a board wargame company) produced two card games, Naval War and Armor Supremacy . The first was fairly popular in wargaming circles, and is a light system of naval combat, though again not depicting any 'real' situation (players may operate ships from opposing navies side-by-side). Armor Supremacy was not as successful, but

21307-549: The world, the oil was actually drained and heated overnight and returned to the engine for cold starts. In the early 1950s, the gasoline Gasifier unit was developed, where, on cold weather starts, raw gasoline was diverted to the unit where part of the fuel was burned causing the other part to become a hot vapor sent directly to the intake valve manifold. This unit was quite popular until electric engine block heaters became standard on gasoline engines sold in cold climates. For ignition, diesel, PPC and HCCI engines rely solely on

21456-425: The world. It later merged with FASA Interactive Technologies (FIT) to form Virtual World Entertainment Group (VWEG) in order to better capitalize on FASA's properties. In 1999, Microsoft Corporation purchased VWEG to integrate FIT into Microsoft Game Studios and sold VWE. VWE continues to develop and support the current BattleTech VR platform called the Tesla II system, featuring BattleTech: Firestorm . Members of

21605-456: Was created by Étienne Lenoir around 1860, and the first modern internal combustion engine, known as the Otto engine , was created in 1876 by Nicolaus Otto . The term internal combustion engine usually refers to an engine in which combustion is intermittent , such as the more familiar two-stroke and four-stroke piston engines, along with variants, such as the six-stroke piston engine and

21754-615: Was invented in Prussia in the early 19th-century, and eventually the Prussian military adopted wargaming as a tool for training their officers and developing doctrine. After Prussia defeated France in the Franco-Prussian War , wargaming was widely adopted by military officers in other countries. Civilian enthusiasts also played wargames for fun, but this was a niche hobby until the development of consumer electronic wargames in

21903-405: Was one of the first motor vehicles to achieve over 100 mpg as a result. Internal combustion engines require ignition of the mixture, either by spark ignition (SI) or compression ignition (CI) . Before the invention of reliable electrical methods, hot tube and flame methods were used. Experimental engines with laser ignition have been built. The spark-ignition engine was a refinement of

22052-581: Was released in April 2018. The game was developed by Harebrained Schemes , and led by Jordan Weisman , the creator of the series. BattleTech material appeared in various publications from other companies, ranging from articles in professional gaming magazines to fanzines devoted exclusively to the game. FASA provided some material to gaming magazines, allowed associated fan clubs like MechForce to publish newsletters, and treated some magazines like BattleTechnology as semi-official publications. Some of this material

22201-405: Was treated as canon at the time and some of it, especially 'Mech designs, came to be used in official product. An exhaustive list is impossible but more notable publications are listed below. Magazines with some BattleTech articles: Fanzines and magazines dedicated to BattleTech: The BattleTech creators' goal of creating an immersive BattleMech simulation came about 1990 with the opening of

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