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69-469: The model name designates the following: The RC212V features an 800 cc (49 cu in), liquid-cooled , four-stroke , DOHC 4-valve V4 to power an all-new chassis built with mass centralization and handling as top priority. Dani Pedrosa and Nicky Hayden rode the factory-backed versions, while the customer machines were ridden by Marco Melandri , Toni Elías , Carlos Checa , and Shinya Nakano . A perennial issue with Honda's GP motorcycle

138-519: A radiator blind (or radiator shroud ) to the radiator that can be adjusted to partially or fully block the airflow through the radiator. At its simplest the blind is a roll of material such as canvas or rubber that is unfurled along the length of the radiator to cover the desired portion. Some older vehicles, like the World War I-era Royal Aircraft Factory S.E.5 and SPAD S.XIII single-engined fighters, have

207-407: A Spitfire . This is similar to Formula 1 cars of today, when stopped on the grid with engines running they require ducted air forced into their radiator pods to prevent overheating. Reducing drag is a major goal in aircraft design, including the design of cooling systems. An early technique was to take advantage of an aircraft's abundant airflow to replace the honeycomb core (many surfaces, with

276-406: A bellows type thermostat, which has corrugated bellows containing a volatile liquid such as alcohol or acetone. These types of thermostats do not work well at cooling system pressures above about 7 psi. Modern motor vehicles typically run at around 15 psi, which precludes the use of the bellows type thermostat. On direct air-cooled engines, this is not a concern for the bellows thermostat that controls

345-427: A flap valve in the air passages. Other factors influence the temperature of the engine, including radiator size and the type of radiator fan. The size of the radiator (and thus its cooling capacity ) is chosen such that it can keep the engine at the design temperature under the most extreme conditions a vehicle is likely to encounter (such as climbing a mountain whilst fully loaded on a hot day). Airflow speed through

414-422: A harmfully false reading. Opening a hot radiator drops the system pressure, which may cause it to boil and eject dangerously hot liquid and steam. Therefore, radiator caps often contain a mechanism that attempts to relieve the internal pressure before the cap can be fully opened. The invention of the automobile water radiator is attributed to Karl Benz . Wilhelm Maybach designed the first honeycomb radiator for

483-476: A high ratio of surface to volume) by a surface-mounted radiator. This uses a single surface blended into the fuselage or wing skin, with the coolant flowing through pipes at the back of this surface. Such designs were seen mostly on World War I aircraft. As they are so dependent on airspeed, surface radiators are even more prone to overheating when ground-running. Racing aircraft such as the Supermarine S.6B ,

552-458: A less efficient but simpler construction. Radiators first used downward vertical flow, driven solely by a thermosyphon effect. Coolant is heated in the engine, becomes less dense, and so rises. As the radiator cools the fluid, the coolant becomes denser and falls. This effect is sufficient for low-power stationary engines , but inadequate for all but the earliest automobiles. All automobiles for many years have used centrifugal pumps to circulate

621-437: A liquid called engine coolant through the engine block and cylinder head where it is heated, then through a radiator where it loses heat to the atmosphere, and then returned to the engine. Engine coolant is usually water-based, but may also be oil. It is common to employ a water pump to force the engine coolant to circulate, and also for an axial fan to force air through the radiator. In automobiles and motorcycles with

690-444: A liquid-cooled internal combustion engine , a radiator is connected to channels running through the engine and cylinder head , through which a liquid ( coolant ) is pumped by a coolant pump. This liquid may be water (in climates where water is unlikely to freeze), but is more commonly a mixture of water and antifreeze in proportions appropriate to the climate. Antifreeze itself is usually ethylene glycol or propylene glycol (with

759-447: A major area of research. The most obvious, and common, solution to this problem was to run the entire cooling system under pressure. This maintained the specific heat capacity at a constant value, while the outside air temperature continued to drop. Such systems thus improved cooling capability as they climbed. For most uses, this solved the problem of cooling high-performance piston engines, and almost all liquid-cooled aircraft engines of

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828-587: A mistake in the motorcycle's development. Melandri decided to ride with the Ducati team in 2008 and Pedrosa's dissatisfaction led to rumors that he was leaving Honda. Towards the end of 2007, however, there were signs of improvement, with the Repsol Honda team taking the last five pole positions of the season and Pedrosa winning the last round at Valencia . For 2008 , HRC planned to use pneumatic valve springs and an all-new chassis. The mass centralization of

897-492: A new chassis and finished the race in second place and Dovizioso finished in sixth; in the test after the race, Pedrosa finished fastest and Dovizioso fifth, using a new swingarm that Pedrosa used in the race, and also a new chassis. Pedrosa later said and Honda confirmed that a fuel sensor problem slowed down the RC212V in the final laps and may have cost him the victory at Jerez. At the third round at Le Mans , Dovizioso finished

966-472: A pair of metal or plastic header tanks, linked by a core with many narrow passageways, giving a high surface area relative to volume. This core is usually made of stacked layers of metal sheet, pressed to form channels and soldered or brazed together. For many years radiators were made from brass or copper cores soldered to brass headers. Modern radiators have aluminum cores, and often save money and weight by using plastic headers with gaskets. This construction

1035-408: A racing seaplane with radiators built into the upper surfaces of its floats, have been described as "being flown on the temperature gauge" as the main limit on their performance. Surface radiators have also been used by a few high-speed racing cars, such as Malcolm Campbell 's Blue Bird of 1928. It is generally a limitation of most cooling systems that the cooling fluid not be allowed to boil, as

1104-470: A radiator is a major influence on the heat it dissipates. Vehicle speed affects this, in rough proportion to the engine effort, thus giving crude self-regulatory feedback. Where an additional cooling fan is driven by the engine, this also tracks engine speed similarly. Engine-driven fans are often regulated by a fan clutch from the drivebelt, which slips and reduces the fan speed at low temperatures. This improves fuel efficiency by not wasting power on driving

1173-413: A separate small radiator to cool the engine oil . Cars with an automatic transmission often have extra connections to the radiator, allowing the transmission fluid to transfer its heat to the coolant in the radiator. These may be either oil-air radiators, as for a smaller version of the main radiator. More simply they may be oil-water coolers, where an oil pipe is inserted inside the water radiator. Though

1242-507: A series of shutters that can be adjusted from the driver's or pilot's seat to provide a degree of control. Some modern cars have a series of shutters that are automatically opened and closed by the engine control unit to provide a balance of cooling and aerodynamics as needed. Because the thermal efficiency of internal combustion engines increases with internal temperature, the coolant is kept at higher-than-atmospheric pressure to increase its boiling point . A calibrated pressure-relief valve

1311-405: A small amount of corrosion inhibitor ). A typical automotive cooling system comprises: The combustion process produces a large amount of heat. If heat were allowed to increase unchecked, detonation would occur, and components outside the engine would fail due to excessive temperature. To combat this effect, coolant is circulated through the engine where it absorbs heat. Once the coolant absorbs

1380-407: Is more difficult to build an aircraft radiator that is able to handle steam, it is by no means impossible. The key requirement is to provide a system that condenses the steam back into liquid before passing it back into the pumps and completing the cooling loop. Such a system can take advantage of the specific heat of vaporization , which in the case of water is five times the specific heat capacity in

1449-411: Is more prone to failure and less easily repaired than traditional materials. An earlier construction method was the honeycomb radiator. Round tubes were swaged into hexagons at their ends, then stacked together and soldered. As they only touched at their ends, this formed what became in effect a solid water tank with many air tubes through it. Some vintage cars use radiator cores made from coiled tube,

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1518-438: Is that the specific heat capacity changes and boiling point reduces with pressure, and this pressure changes more rapidly with altitude than the drop in temperature. Thus, generally, liquid cooling systems lose capacity as the aircraft climbs. This was a major limit on performance during the 1930s when the introduction of turbosuperchargers first allowed convenient travel at altitudes above 15,000 ft, and cooling design became

1587-437: Is usually incorporated in the radiator's fill cap. This pressure varies between models, but typically ranges from 4 to 30 psi (30 to 200 kPa). As the coolant system pressure increases with a rise in temperature, it will reach the point where the pressure relief valve allows excess pressure to escape. This will stop when the system temperature stops rising. In the case of an over-filled radiator (or header tank) pressure

1656-434: Is vented by allowing a little liquid to escape. This may simply drain onto the ground or be collected in a vented container which remains at atmospheric pressure. When the engine is switched off, the cooling system cools and liquid level drops. In some cases where excess liquid has been collected in a bottle, this may be 'sucked' back into the main coolant circuit. In other cases, it is not. Before World War II, engine coolant

1725-449: Is which team and rider receives the best parts and whether performance differences are due to the rider not the machine. Before the racing season started in 2007, Melandri was quoted as saying, "In the past few tests I've seen a big progression with Pedrosa's bike, but we're still waiting for new parts from Honda." After a few rounds, Honda riders did not achieve the results expected, leading HRC chief Satoru Horiike to admit that they made

1794-772: The 2012 RC213V , though leased models will still be raced by satellite teams. Titles Won Riders: 2011 ( Casey Stoner ) Constructors: 2011 Races won: 26 2011: Stoner 10, Pedrosa 3 (13 in total) 2010: Pedrosa 4 (4 in total) 2009: Pedrosa 2, Dovizioso 1 (3 in total) 2008: Pedrosa 2 (2 in total) 2007: Pedrosa 2 (2 in total) 2006: Pedrosa 2 (2 in total) Poles: 30 2011: Stoner 12, Pedrosa 3 (15 in total) 2010: Pedrosa 4, Dovizioso 1 (5 in total) 2009: Pedrosa 2 (2 in total) 2008: Pedrosa 2 (2 in total) 2007: Pedrosa 5, Hayden 1 (6 in total) ( key ) (results in bold indicate pole position; results in italics indicate fastest lap) (the teams are bold indicate factory teams;

1863-560: The Mercedes 35hp . It is sometimes necessary for a car to be equipped with a second, or auxiliary, radiator to increase the cooling capacity, when the size of the original radiator cannot be increased. The second radiator is plumbed in series with the main radiator in the circuit. This was the case when the Audi 100 was first turbocharged creating the 200. These are not to be confused with intercoolers . Some engines have an oil cooler,

1932-554: The P-51 Mustang ) derive thrust from it. The thrust was significant enough to offset the drag of the duct the radiator was enclosed in and allowed the aircraft to achieve zero cooling drag. At one point, there were even plans to equip the Supermarine Spitfire with an afterburner , by injecting fuel into the exhaust duct after the radiator and igniting it . Afterburning is achieved by injecting additional fuel into

2001-605: The 14th round at Motegi, the throttle cable stuck and caused Pedrosa to crash and break his collarbone, causing him to miss the race and putting him out of contention for the championship. At the 16th round in Australia , Dovizioso's steering damper had a problem, forcing him to retire from the race. The season ended with Honda placing second in the MotoGP constructor championship with 342 points, 62 points behind first-place Yamaha and 56 points ahead of third-place Ducati. For 2011

2070-564: The 2007 model was thought to have gone too far, and instead the 2008 model is more open, reducing heat and improving balance. The factory team riders are Pedrosa (through 2009) and Hayden (through 2008). Satellite team riders are Nakano, Andrea Dovizioso , Randy de Puniet and Alex de Angelis . The 2008 pneumatic valve version has only been available to the Repsol Honda team, and in pre-season testing it has been highly problematic. The original intent of running an all-new engine and chassis

2139-423: The 2011 chassis, while Pedrosa decided to stay with the more flexible 2010 version. After the third round at Estoril, Dovizioso began to use a new clutch designed to reduce hopping under braking. Honda won the manufacturer's championship with 13 wins between Stoner's ten and Pedrosa's three, and never finished lower than second in race results. The factory RC212V was retired at the end of the season to make way for

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2208-558: The Donington round, and he was charged with developing the new engine for the rest of the season (Pedrosa deciding to continue using the conventional valve engine). An electronic problem at the subsequent Assen round caused Hayden to run out of fuel just before the line, allowing Colin Edwards to come around him and take the remaining podium position. At the 13th round it was announced that Pedrosa would switch to Bridgestone tires for

2277-473: The World War II period used this solution. However, pressurized systems were also more complex, and far more susceptible to damage - as the cooling fluid was under pressure, even minor damage in the cooling system like a single rifle-calibre bullet hole, would cause the liquid to rapidly spray out of the hole. Failures of the cooling systems were, by far, the leading cause of engine failures. Although it

2346-413: The adoption of glycol or water-glycol mixtures. These led to the adoption of glycols for their antifreeze properties. Since the development of aluminium alloy or mixed-metal engines, corrosion inhibition has become even more important than antifreeze, and in all regions and seasons. An overflow tank that runs dry may result in the coolant vaporizing, which can cause localized or general overheating of

2415-555: The aircraft wings, fuselage and even the rudder. Several aircraft were built using their design and set numerous performance records, notably the Heinkel He 119 and Heinkel He 100 . However, these systems required numerous pumps to return the liquid from the spread-out radiators and proved to be extremely difficult to keep running properly, and were much more susceptible to battle damage. Efforts to develop this system had generally been abandoned by 1940. The need for evaporative cooling

2484-400: The bike is shorter with a higher center of gravity. Also, Honda hired Andre Zugna and Cristian Battaglia, formerly Yamaha race engineers, and Carlo Luzzi, formerly Jorge Lorenzo ’s telemetry technician at Yamaha. According to one analysis of pre-season tests at Sepang and Qatar, Dovizioso's average placing in the tests was third, while Pedrosa's was ninth. Pedrosa complained of problems with

2553-472: The coolant temperature as the engine warms up. Engine coolant is directed by the thermostat to the inlet of the circulating pump and is returned directly to the engine, bypassing the radiator. Directing water to circulate only through the engine allows the engine to reach optimum operating temperature as quickly as possible whilst avoiding localized "hot spots." Once the coolant reaches the thermostat's activation temperature, it opens, allowing water to flow through

2622-437: The correct clearances. Another side effect of over-cooling is reduced performance of the cabin heater, though in typical cases it still blows air at a considerably higher temperature than ambient. The thermostat is therefore constantly moving throughout its range, responding to changes in vehicle operating load, speed, and external temperature, to keep the engine at its optimum operating temperature. On vintage cars you may find

2691-472: The engine coolant because natural circulation has very low flow rates. A system of valves or baffles, or both, is usually incorporated to simultaneously operate a small radiator inside the vehicle. This small radiator, and the associated blower fan, is called the heater core , and serves to warm the cabin interior. Like the radiator, the heater core acts by removing heat from the engine. For this reason, automotive technicians often advise operators to turn on

2760-483: The engine downstream of the main combustion cycle. Engines for stationary plant are normally cooled by radiators in the same way as automobile engines. There are some unique differences, depending on the stationary plant – careful planning must be taken to ensure proper air flow across the radiator to ensure proper cooling. In some cases, evaporative cooling is used via a cooling tower . 2009 Catalan motorcycle Grand Prix The 2009 Catalan motorcycle Grand Prix

2829-459: The engine is producing. Allowing too much flow of coolant to the radiator would result in the engine being over-cooled and operating at lower than optimum temperature, resulting in decreased fuel efficiency and increased exhaust emissions. Furthermore, engine durability, reliability, and longevity are sometimes compromised, if any components (such as the crankshaft bearings) are engineered to take thermal expansion into account to fit together with

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2898-410: The engine. Severe damage may result if the vehicle is allowed to run over temperature. Failures such as blown head gaskets, and warped or cracked cylinder heads or cylinder blocks may be the result. Sometimes there will be no warning, because the temperature sensor that provides data for the temperature gauge (either mechanical or electrical) is exposed to water vapor, not the liquid coolant, providing

2967-405: The enormous amount of heat energy soaked up during the generation of steam, equivalent to 500 °C. In effect, the evaporative version is operating between 80 °C and 560 °C, a 480 °C effective temperature difference. Such a system can be effective even with much smaller amounts of water. The downside to the evaporative cooling system is the area of the condensers required to cool

3036-454: The factory supported riders were Andrea Dovizioso , Dani Pedrosa , Casey Stoner , and Marco Simoncelli while the satellite supported riders were Hiroshi Aoyama and Toni Elías . Honda riders dominated pre-season testing. Frame geometry and rigidity are the same as the previous year, making the 2011 bike an evolution of the 2010 version. One of the improvements to the 2011 machine is a "seamless transmission". Stoner and Dovizioso chose to use

3105-402: The factory team tried a new chassis and swingarm. Pedrosa and Dovizioso had the 3rd and 6th fastest times over the three-day test. For 2010 , the factory team riders are Pedrosa and Dovizioso, and the satellite team riders are Hiroshi Aoyama , de Puniet, Melandri and Marco Simoncelli . All riders are using Öhlins suspension components this year. The electronic systems were given an update, and

3174-494: The fan unnecessarily. On modern vehicles, further regulation of cooling rate is provided by either variable speed or cycling radiator fans. Electric fans are controlled by a thermostatic switch or the engine control unit . Electric fans also have the advantage of giving good airflow and cooling at low engine revs or when stationary, such as in slow-moving traffic. Before the development of viscous-drive and electric fans, engines were fitted with simple fixed fans that drew air through

3243-404: The heat from the engine it continues its flow to the radiator. The radiator transfers heat from the coolant to the passing air. Radiators are also used to cool automatic transmission fluids , air conditioner refrigerant , intake air , and sometimes to cool motor oil or power steering fluid . A radiator is typically mounted in a position where it receives airflow from the forward movement of

3312-407: The heater and set it to high if the engine is overheating , to assist the main radiator. The engine temperature on modern cars is primarily controlled by a wax-pellet type of thermostat , a valve that opens once the engine has reached its optimum operating temperature . When the engine is cold, the thermostat is closed except for a small bypass flow so that the thermostat experiences changes to

3381-422: The incoming air charge—not to cool the engine. Aircraft with liquid-cooled piston engines (usually inline engines rather than radial) also require radiators. As airspeed is higher than for cars, these are efficiently cooled in flight, and so do not require large areas or cooling fans. Many high-performance aircraft however suffer extreme overheating problems when idling on the ground - a mere seven minutes for

3450-616: The liquid form. Additional gains may be had by allowing the steam to become superheated. Such systems, known as evaporative coolers , were the topic of considerable research in the 1930s. Consider two cooling systems that are otherwise similar, operating at an ambient air temperature of 20 °C. An all-liquid design might operate between 30 °C and 90 °C, offering 60 °C of temperature difference to carry away heat. An evaporative cooling system might operate between 80 °C and 110 °C. At first glance this appears to be much less temperature difference, but this analysis overlooks

3519-433: The need to handle gas in the flow greatly complicates design. For a water cooled system, this means that the maximum amount of heat transfer is limited by the specific heat capacity of water and the difference in temperature between ambient and 100 °C. This provides more effective cooling in the winter, or at higher altitudes where the temperatures are low. Another effect that is especially important in aircraft cooling

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3588-404: The race in third and Pedrosa in fifth, the latter getting passed in the last lap by Dovizioso and Hayden and later reporting problems with the rear brake. Melandri had switched back to Showa suspension and finished in sixth place. At the fourth round at Mugello , Pedrosa won the race, Dovizioso finished third and Melandri finished fifth. Pedrosa used a 2009 model rear shock. During first practice at

3657-416: The race, Dovizioso finished in 4th place and Pedrosa in 6th, and Pedrosa announced he would skip the test to rest. Using the new chassis, Dovizioso was top rider of the test. In practice at Round 7 at Assen Pedrosa remarked that the new chassis was an improvement in braking and stability, but both Pedrosa and Dovizioso crashed in the race at the same turn. At the following round at Laguna Seca , Pedrosa won

3726-617: The race, while Dovizioso crashed out. In post-race testing at Brno, the Repsol team tested Öhlins suspension components, which until then had been using Showa . For the San Marino round, Dovizioso will use Öhlins and Pedrosa will use Showa suspension. The 2009 season ended with three wins for the Repsol Honda team—two for Pedrosa and one for Dovizioso—and a 2nd place in the constructor championship for Honda. At post-race testing at Valencia, Pedrosa tested Öhlins suspension exclusively, and

3795-450: The radiator at all times. Vehicles whose design required the installation of a large radiator to cope with heavy work at high temperatures, such as commercial vehicles and tractors would often run cool in cold weather under light loads, even with the presence of a thermostat , as the large radiator and fixed fan caused a rapid and significant drop in coolant temperature as soon as the thermostat opened. This problem can be solved by fitting

3864-431: The radiator to prevent the temperature from rising higher. Once at optimum temperature, the thermostat controls the flow of engine coolant to the radiator so that the engine continues to operate at optimum temperature. Under peak load conditions, such as driving slowly up a steep hill whilst heavily laden on a hot day, the thermostat will be approaching fully open because the engine will be producing near maximum power while

3933-436: The remainder of the season, and he also planned to start racing the pneumatic valved engine in the 14th round at Indianapolis . Unlike the other Honda teams, de Puniet's LCR Team used Öhlins suspension instead of Showa . For 2009 , the factory team riders were Pedrosa and Dovizioso, and the satellite team riders were Elías, De Angelis, de Puniet and Yuki Takahashi ; Elías was given a factory spec machine. The 2009 model

4002-442: The riders are bold indicate the rider rode a factory bikes in the satellite teams) Radiator (engine cooling) Radiators are heat exchangers used for cooling internal combustion engines , mainly in automobiles but also in piston-engined aircraft , railway locomotives , motorcycles , stationary generating plants or any similar use of such an engine. Internal combustion engines are often cooled by circulating

4071-470: The same story. What I really need is to see is some things coming, not always just hearing, talking, or a meeting. I'd like to have something where I can say okay, thank you, this is good." Before Round 6 at Catalunya , Dovizioso expressed frustration that Pedrosa would be given priority in the post-race test, feeling that the Spaniard's poor physical condition would not lead to a productive evaluation. In

4140-509: The steam back below the boiling point. As steam is much less dense than water, a correspondingly larger surface area is needed to provide enough airflow to cool the steam back down. The Rolls-Royce Goshawk design of 1933 used conventional radiator-like condensers and this design proved to be a serious problem for drag. In Germany, the Günter brothers developed an alternative design combining evaporative cooling and surface radiators spread all over

4209-467: The suspension and chassis, and at the first race of the season in Qatar , Dovizioso finished third, while Pedrosa finished in seventh place. Pedrosa experienced speed wobbles down the front straight, and Honda determined that they had committed a mistake in the design of the chassis, and that by trying to make the bike easier to ride, they made it too flexible. By the following round at Jerez , Pedrosa had

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4278-527: The vehicle, such as behind a front grill. Where engines are mid- or rear-mounted, it is common to mount the radiator behind a front grill to achieve sufficient airflow, even though this requires long coolant pipes. Alternatively, the radiator may draw air from the flow over the top of the vehicle or from a side-mounted grill. For long vehicles, such as buses, side airflow is most common for engine and transmission cooling and top airflow most common for air conditioner cooling. Automobile radiators are constructed of

4347-407: The velocity of airflow across the radiator is low. (Being a heat exchanger, the velocity of air flow across the radiator has a major effect on its ability to dissipate heat.) Conversely, when cruising fast downhill on a motorway on a cold night on a light throttle, the thermostat will be nearly closed because the engine is producing little power, and the radiator is able to dissipate much more heat than

4416-447: The water is hotter than the ambient air, its higher thermal conductivity offers comparable cooling (within limits) from a less complex and thus cheaper and more reliable oil cooler. Less commonly, power steering fluid, brake fluid, and other hydraulic fluids may be cooled by an auxiliary radiator on a vehicle. Turbo charged or supercharged engines may have an intercooler , which is an air-to-air or air-to-water radiator used to cool

4485-480: Was largely the same as the 2008. All 6 of the RC212Vs used pneumatic valve engines. After two rounds the Repsol Honda riders had only achieved a single podium. Vice president of HRC, Shuhei Nakamoto , said "If Dani does not win the world championship it is Honda's responsibility, not Dani's," while Pedrosa said "I've spoken to (Nakamoto) but I've spoken to many people like him, but it seems like it's three years of

4554-417: Was shelved when the engine did not perform to expectations. Pedrosa and Hayden then tested a 2007 engine in a 2008 chassis, and after still being near the bottom of testing timesheets, the Repsol Honda team used the 2007 version in the first round's practice for comparison purposes. For the race , Pedrosa chose a revised 2008 chassis while Hayden chose the 2007. The pneumatic engine was race-debuted by Hayden at

4623-467: Was soon to be negated by the widespread availability of ethylene glycol based coolants, which had a lower specific heat , but a much higher boiling point than water. An aircraft radiator contained in a duct heats the air passing through, causing the air to expand and gain velocity. This is called the Meredith effect , and high-performance piston aircraft with well-designed low-drag radiators (notably

4692-455: Was the sixth round of the 2009 Grand Prix motorcycle racing season . It took place on the weekend of 12–14 June 2009 at the Circuit de Catalunya . This race is known as one of the most thrilling in MotoGP history, because Valentino Rossi held off the challenge of teammate Jorge Lorenzo by overtaking him in the last corner, on the last lap, to win the race. Julian Simon, a Spanish racer in

4761-417: Was usually plain water. Antifreeze was used solely to control freezing, and this was often only done in cold weather. If plain water is left to freeze in the block of an engine the water can expand as it freezes. This effect can cause severe internal engine damage due to the expanding of the ice. Development in high-performance aircraft engines required improved coolants with higher boiling points, leading to

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