Misplaced Pages

#227772

95-555: The Santa Clara River was named by Spanish explorers for Clare of Assisi . The valley later became known as "little Santa Clara" in deference to the Northern California mission and city of Santa Clara, California . In time, "little Santa Clara" became "Santa Clarita". The Santa Clarita Valley is bordered by the Lake Piru area, including the community of Val Verde , Los Padres National Forest , and Castaic Lake to

190-505: A whirling arm apparatus to determine drag and did some of the first experiments in aviation theory. Sir George Cayley (1773–1857) also used a whirling arm to measure the drag and lift of various airfoils. His whirling arm was 5 feet (1.5 m) long and attained top speeds between 10 and 20 feet per second (3 to 6 m/s). Otto Lilienthal used a rotating arm to accurately measure wing airfoils with varying angles of attack , establishing their lift-to-drag ratio polar diagrams, but

285-470: A Lenten service in the church of San Giorgio at Assisi. Inspired by his words and knowing that marriage was rapidly approaching, Clare went to Francis and asked him to help her to live after the manner of the Gospel. On the evening of Palm Sunday , 20 March 1212, with the consent of Guido II, bishop of Assisi, Clare left her father's house accompanied by her aunt Bianca and another companion, and proceeded to

380-516: A centrifugal blower in 1897, and determined the drag coefficients of flat plates, cylinders and spheres. Danish inventor Poul la Cour applied wind tunnels in his process of developing and refining the technology of wind turbines in the early 1890s. Carl Rickard Nyberg used a wind tunnel when designing his Flugan from 1897 and onwards. In a classic set of experiments, the Englishman Osborne Reynolds (1842–1912) of

475-483: A factor), and so is not directly useful for accurate measurements. The air moving through the tunnel needs to be relatively turbulence-free and laminar . To correct this problem, closely spaced vertical and horizontal air vanes are used to smooth out the turbulent airflow before reaching the subject of the testing. Due to the effects of viscosity , the cross-section of a wind tunnel is typically circular rather than square, because there will be greater flow constriction in

570-582: A few days later Francis sent her to Sant' Angelo in Panzo, another monastery of the Benedictine nuns on one of the flanks of Subasio. Her sister Catarina unexpectedly joined Clare 16 days later and took the name 'Agnes'. This caused a tremendous uproar in Clare's family as now two of their girls had refused marriage and left the family. Clare's uncle Monaldo, who was head of the family, came to Sant' Angelo with

665-418: A foot across, to over 100 feet (30 m), and can have air that moves at speeds from a light breeze to hypersonic velocities. Usually, large fans move air through the wind tunnel, while the object being tested is held stationary. The object can be an aerodynamic test object such as a cylinder or an airfoil, an individual component of an aircraft, a small model of the vehicle, or, in the largest tunnels, even

760-471: A full-sized vehicle. Different measurements can be taken from these tests. The aerodynamic forces on the entire object can be measured, or on individual components of it. The air pressure at different points can be measured with sensors. Smoke can be introduced into the airstream to show the path that air takes around the object. Or, small threads can be attached to specific parts to show the airflow at those points. The earliest wind tunnels were invented towards

855-490: A group of men to bring Agnes back. He confronted Agnes forcefully while Clare was praying for her sister's safety. In the end, Monaldo left empty-handed as he and his men failed to force Agnes to return home. The sisters remained with the Benedictines until a small dwelling was built for them next to the church of San Damiano , which Francis had repaired some years earlier. The dwelling was built hastily, as Francis and

950-496: A large areas of artificial fill stretching from Newhall Ranch Road up to Copper Hill Drive. The valley is bisected by the San Gabriel Fault , which runs through the center of the valley along a NW-SE axis. The much smaller Holser Fault runs east-to-west between the south-eastern Topatopa Mountains and the present day community of Valencia . Neither fault line has been active since the early Holocene era. The valley

1045-565: A newly constructed shrine in the crypt of the Basilica of Saint Clare, where her relics can still be venerated today. Clare was canonized on 26 September 1255 by Pope Alexander IV , and her feast day was immediately inserted in the General Roman Calendar for celebration on 12 August, the day after her death, as 11 August was already assigned to Saints Tiburtius and Susanna , two 3rd-century Roman martyrs. The celebration

SECTION 10

#1732773334228

1140-566: A pair of Saracen armies attacked the monastery of San Damiano and the town of Assisi. Both targets were successfully defended as Clare prayed to Christ, present in the Blessed Sacrament . In her later years, Clare endured a long period of poor health. She died on 11 August 1253 at the age of 59, one day after having her Rule approved by Pope Innocent IV. Her last words are reported to have been, "Blessed be You, O God, for having created me." On 9 August 1253, two days before her death,

1235-405: A pair of fans driven by 4,000 hp (3,000 kW) electric motors. The layout was a double-return, closed-loop format and could accommodate many full-size real aircraft as well as scale models. The tunnel was eventually closed and, even though it was declared a National Historic Landmark in 1995, demolition began in 2010. Until World War II, the world's largest wind tunnel, built in 1932–1934,

1330-731: A problem with Clare's lifestyle of strict poverty. Gregory IX was the Cardinal Huglino who had previously known and worked with Clare and her order at San Damiano. During this time, he came to care for Clare and she became very dear to him. Gregory IX worried that the health of the sisters would suffer unduly under the strict vow of poverty Clare wanted. During a visit to San Damiano, Gregory IX urged Clare to give up her way of strict poverty, stating that "if you fear because of your vow, We dispense you from it", to which she immediately responded, "Holy Father, never and in no way do I wish to be dispensed from following Christ!" At that moment,

1425-575: A short period, the order was directed by Francis himself. In 1216, however, Clare reluctantly accepted the role of abbess of San Damiano. As abbess, Clare had more authority to lead the order than when she was the prioress and required to follow the orders of a priest heading the community. Clare did not care for titles or power within the Order, and took on the role of abbess only on the instruction of Francis. Clare referred to herself by such terms as mother, handmaid, or servant rather than an abbess. She

1520-584: A significant role in encouraging and aiding Francis, whom she saw as a spiritual father figure, and she took care of him during his final illness. After Francis's death, Clare continued to promote the growth of her order, writing letters to abbesses in other parts of Europe, including Agnes of Prague, with whom she had formed a close friendship. However, with Francis gone, she faced another challenge. The fourth Lateran council of 1215 decreed that any new religious communities that had not yet been approved would have to adopt an established order. This established order

1615-435: A test model can also be determined by performing a wake survey , in which either a single pitot tube is used to obtain multiple readings downstream of the test model, or a multiple-tube manometer is mounted downstream and all its readings are taken. The aerodynamic properties of an object can not all remain the same for a scaled model. However, by observing certain similarity rules, a very satisfactory correspondence between

1710-431: A wind tunnel type of test during an actual flight in order to refine the computational model. Where external turbulent flow is present, CFD is not practical due to limitations in present-day computing resources. For example, an area that is still much too complex for the use of CFD is determining the effects of flow on and around structures, bridges, and terrain. The most effective way to simulative external turbulent flow

1805-473: A year after Clare's canonization, and her remains were transferred there on 3 October 1260 from the church of St George, also in Assisi. Her bones are now in the crypt at the Basilica, having been rediscovered in 1850. In art, Clare is often shown carrying a monstrance or pyx , in commemoration of the occasion when she warded away the invading soldiers of Frederick II at the gates of her convent by displaying

1900-454: Is Soledad Canyon which contains the communities of Vincent, Acton , Ravenna, and Agua Dulce . The Santa Clarita Valley is underlain by Quaternary alluvial deposits and coarse-grained Pleistocene age conglomerates dominated by sandstone of marine and non-marine origin. The far eastern end of the valley features predominantly coarse-grained Tertiary age formations of sedimentary origin. The southern end of Bouquet Canyon features

1995-601: Is remembered in the Church of England and other churches of the Anglican Communion with a Lesser Festival on 11 August. Wind tunnel Wind tunnels are machines in which objects are held stationary inside a tube, and air is blown around it to study the interaction between the object and the moving air. They are used to test the aerodynamic effects of aircraft , rockets , cars , and buildings . Different wind tunnels range in size from less than

SECTION 20

#1732773334228

2090-405: Is blown or sucked through a duct equipped with a viewing port and instrumentation where models or geometrical shapes are mounted for study. Typically the air is moved through the tunnel using a series of fans. For very large wind tunnels several meters in diameter, a single large fan is not practical, and so instead an array of multiple fans are used in parallel to provide sufficient airflow. Due to

2185-527: Is for understanding exhaust gas dispersion patterns for hospitals, laboratories, and other emitting sources. Other examples of boundary layer wind tunnel applications are assessments of pedestrian comfort and snow drifting. Wind tunnel modeling is accepted as a method for aiding in green building design. For instance, the use of boundary layer wind tunnel modeling can be used as a credit for Leadership in Energy and Environmental Design (LEED) certification through

2280-693: Is home to the 262-acre (106 ha) theme park Six Flags Magic Mountain which includes the gated waterpark Six Flags Hurricane Harbor . It offers a variety of family-oriented activity centers such as the Santa Clarita Aquatics Center, Copper Horse Riding Ranch, and the Cube (formerly Ice Station Valencia), restaurants and shopping centers, golf courses, cinemas and theaters, luxurious day spas, outdoor recreation areas like Castaic Lake , Placerita Canyon , and Santa Clarita Woodlands Park , as well as acres of parkland, animal sanctuaries like

2375-468: Is hundreds of miles to the south and gave its name to the nearby city of Santa Clarita . The early California missions were founded by Franciscan Friars, who had a special devotion to Saint Clare. Santa Clara Pueblo, New Mexico , celebrates its Santa Clara Feast Day annually on 12 August, as the feast was celebrated before the 1969 calendar change. The first convent in Cuba, Convento de Santa Clara de Asis ,

2470-708: Is located in the northeastern extreme of the Ventura Basin Province, a petroleum-rich sedimentary basin with a long history of oil and gas production. The valley features a Mediterranean climate ( Köppen Csa ), approaching a semi-arid climate , with hot, dry summers and mild, moderately rainy winters with rare snowfall. Temperatures often exceed 100 °F (38 °C), even 110 °F (43 °C), on hot summer afternoons but rarely dip below 32 °F (0 °C) on cold winter nights. The valley lies within plant hardiness zones 9b and 10a. Late spring and early summer mornings are often overcast due to

2565-676: Is susceptible to wildfires. Although wildfires are most common in summer and fall, they can occur throughout the year during drought conditions, such as in December 2017 . Wildfire risk is highest when Santa Ana winds blow through the area from the Mojave Desert. Notable wildfires in the Santa Clarita Valley include the Buckweed Fire , Sand Fire , Rye Fire , Tick Fire , and Maria Fire . Santa Clarita lies on

2660-409: Is through the use of a boundary layer wind tunnel. There are many applications for boundary layer wind tunnel modeling. For example, understanding the impact of wind on high-rise buildings, factories, bridges, etc. can help building designers construct a structure that stands up to wind effects in the most efficient manner possible. Another significant application for boundary layer wind tunnel modeling

2755-782: The Castaic , Newhall , Saugus , and Sulphur Springs school districts. Junior high and high schools are part of the William S. Hart Union High School District , except for Castaic Middle School which is in the Castaic Union School District. The unincorporated mountain communities of Acton and Agua Dulce are served by the Acton-Agua Dulce Unified School District , which serves students from kindergarten through 12th grade. There are three institutions of higher education in

2850-561: The Order of Poor Ladies , a monastic religious order for women in the Franciscan tradition. The Order of Poor Ladies was different from any other order or convent because it followed a rule of strict poverty. Clare wrote their Rule of Life, the first set of monastic guidelines known to have been written by a woman. Following her death, the order she founded was renamed in her honor as the Order of Saint Clare, commonly referred to today as

2945-683: The San Fernando Valley and Los Angeles Basin via Newhall Pass to the south; Antelope Valley via CA 14 through Soledad Pass to the northeast; the San Joaquin Valley via I-5 through Tejon Pass to the northwest, and Leona Valley via San Francisquito and Bouquet canyons. Downstream lies the Santa Clara River Valley , which was given the moniker Heritage Valley by the tourism bureau representing Piru , Fillmore , and Santa Paula . Upstream

Santa Clarita Valley - Misplaced Pages Continue

3040-531: The University of Manchester demonstrated that the airflow pattern over a scale model would be the same for the full-scale vehicle if a certain flow parameter were the same in both cases. This factor, now known as the Reynolds number , is a basic parameter in the description of all fluid-flow situations, including the shapes of flow patterns, the ease of heat transfer, and the onset of turbulence. This comprises

3135-485: The fuel efficiency of vehicles by reducing the aerodynamic drag. In these studies, the interaction between the road and the vehicle plays a significant role, and this interaction must be taken into consideration when interpreting the test results. In the real world, the vehicle is moving while the road and air are stationary. In a wind tunnel test, the road must also be moved past a vehicle along with air being blown around it. This has been accomplished with moving belts under

3230-606: The papal bull Solet annuere of Pope Innocent IV confirmed that Clare's rule would serve as the governing rule for Clare's Order of Poor Ladies. Her remains were interred at the chapel of San Giorgio while a church to hold her remains was being constructed. At her funeral, Pope Innocent IV insisted the friars perform the Office for the Virgin Saints as opposed to the Office for the Dead. This move by Pope Innocent ensured that

3325-542: The 1920s, on cars such as the Rumpler Tropfenwagen , and later the Chrysler Airflow . Initially, automakers would test out scale models of their cars, but later, full scale automotive wind tunnels were built. Starting in the 1960s, wind tunnel testing began to receive widespread adoption for automobiles , not so much to determine aerodynamic forces in the same way as an airplane, but to increase

3420-413: The Benedictines feared further conflict with Monaldo and other relatives of Clare and Agnes. Other women joined the sisters, and they became known as the "Poor Ladies of San Damiano". They lived a simple life of poverty, austerity, and seclusion from the world, according to a Rule which Francis gave them as a Second Order (Poor Clares). San Damiano became the centre of Clare's new religious order, which

3515-560: The Blessed Sacrament and kneeling in prayer. Pope Pius XII designated Clare as the patron saint of television in 1958 on the basis that when she was too ill to attend Mass , she had reportedly been able to see and hear it on the wall of her room. There are traditions of bringing offerings of eggs to the Poor Clares for their intercessions for good weather, particularly for weddings. This tradition remains popular in

3610-630: The Gentle Barn and Gibbon Conservation Center , over 70 miles of paseos and trails for hiking and biking, and more. The valley is also home to a number of historical sites, such as the oil drilling town Mentryville , Walk of Western Stars, and William S. Hart Ranch and Museum . The Santa Clarita Valley has a rich Western heritage, and since 1994, it has hosted an annual Cowboy Festival , which attracts more than 10,000 visitors each year. Elementary school students in Santa Clarita are served by

3705-784: The Philippines, particularly at the Real Monasterio de Santa Clara in Quezon City and in the town of Obando, Bulacan . According to the Filipino essayist Alejandro Roces , the practice arose because of Clare's name. In Castilian clara refers to an interval of clear weather, and also to the white or albumen of the egg. Many places, including churches , convents , schools , hospitals , towns , and counties are named for Saint Clare, Santa Clara , or other variants. Lake Saint Clair between Lake Erie and Lake Huron

3800-679: The Poor Clares. Her feast day is on 11 August. Clare was born in Assisi to the Offreduccio household during the High Middle Ages , the eldest daughter of Favarone or Favorino Sciffi, Count of Sasso-Rosso, and his wife Ortolana . Traditional accounts say that Clare's father was a wealthy representative of an ancient Roman family, who owned a large palace in Assisi and a castle on the slope of Mount Subasio . Ortolana belonged to

3895-530: The Pope had no more objections, and during his second year as Pope reapproved the Privilegium Paupertatis . Following the Order's approval from the Pope, Clare wanted to make a Rule based on Francis's teachings, which her sisters would be able to follow long after she died. Clare began writing her own Rule, keeping Francis's teachings at the forefront of her mind. Her Rule especially emphasized

Santa Clarita Valley - Misplaced Pages Continue

3990-523: The U.S. Green Building Council. Wind tunnel tests in a boundary layer wind tunnel allow for the natural drag of the Earth's surface to be simulated. For accuracy, it is important to simulate the mean wind speed profile and turbulence effects within the atmospheric boundary layer. Most codes and standards recognize that wind tunnel testing can produce reliable information for designers, especially when their projects are in complex terrain or on exposed sites. In

4085-466: The United States as part of the plan to exploit German technology developments. For limited applications, computational fluid dynamics (CFD) can supplement or possibly replace the use of wind tunnels. For example, the experimental rocket plane SpaceShipOne was designed without any use of wind tunnels. However, on one test, flight threads were attached to the surface of the wings, performing

4180-403: The United States, many wind tunnels have been decommissioned from 1990 to 2010, including some historic facilities. Pressure is brought to bear on remaining wind tunnels due to declining or erratic usage, high electricity costs, and in some cases the high value of the real estate upon which the facility sits. On the other hand, CFD validation still requires wind-tunnel data, and this is likely to be

4275-589: The above, however, that they were simply using the accepted technology of the day, though this was not yet a common technology in America. In France , Gustave Eiffel (1832–1923) built his first open-return wind tunnel in 1909, powered by a 67 hp (50 kW) electric motor, at Champs-de-Mars, near the foot of the tower that bears his name. Between 1909 and 1912 Eiffel ran about 4,000 tests in his wind tunnel, and his systematic experimentation set new standards for aeronautical research. In 1912 Eiffel's laboratory

4370-601: The absolute non-possession of property. She had her Rule approved by both Cardinal Rainaldo and Pope Innocent IV. Clare's Franciscan theology of joyous poverty in imitation of Christ is evident in the Rule she wrote for her community and in her four letters to Agnes of Prague . As Holy Roman Emperor Frederick II battled Pope Gregory IX for control of Italy during the Crusades era, separately in September 1240 and June 1241,

4465-471: The aerodynamic properties of a scaled model and a full-size object can be achieved. The choice of similarity parameters depends on the purpose of the test, but the most important conditions to satisfy are usually: In certain particular test cases, other similarity parameters must be satisfied, such as e.g. Froude number . English military engineer and mathematician Benjamin Robins (1707–1751) invented

4560-434: The aerodynamic surfaces. The direction of airflow approaching a surface can be visualized by mounting threads in the airflow ahead of and aft of the test model. Smoke or bubbles of liquid can be introduced into the airflow upstream of the test model, and their path around the model can be photographed (see particle image velocimetry ). Aerodynamic forces on the test model are usually measured with beam balances , connected to

4655-638: The answers out of a wind tunnel." In 1941 the US constructed one of the largest wind tunnels at that time at Wright Field in Dayton, Ohio. This wind tunnel starts at 45 feet (14 m) and narrows to 20 feet (6.1 m) in diameter. Two 40-foot (12 m) fans were driven by a 40,000 hp electric motor. Large scale aircraft models could be tested at air speeds of 400 mph (640 km/h). During WWII, Germany developed different designs of large wind tunnels to further their knowledge of aeronautics. For example,

4750-583: The boundary between the WWF -designated California coastal sage and chaparral ecoregion to the southwest, and California montane chaparral and woodlands ecoregion to the northeast. Resident species of note include bobcat , coyote , red-tailed hawk , and desert cottontail . The Santa Clarita Valley is about 20 miles (32 km) from the Burbank Bob Hope Airport , and about 35 miles (56 km) from Los Angeles International Airport . It

4845-434: The canonization process for Clare would begin shortly after her funeral. Pope Innocent was cautioned by multiple advisers against having the Office for the Virgin Saints performed at Clare's funeral. The most vocal of these advisers was Cardinal Raynaldus, who would later become Pope Alexander IV and, in two years' time, would canonize Clare. At Pope Innocent's request the canonization process for Clare began immediately. While

SECTION 50

#1732773334228

4940-555: The case for the foreseeable future. Studies have been done and others are underway to assess future military and commercial wind tunnel needs, but the outcome remains uncertain. More recently an increasing use of jet-powered, instrumented unmanned vehicles, or research drones, have replaced some of the traditional uses of wind tunnels. The world's fastest wind tunnel as of 2019 is the LENS-X wind tunnel, located in Buffalo, New York. Air

5035-483: The central scientific justification for the use of models in wind tunnels to simulate real-life phenomena. However, there are limitations on conditions in which dynamic similarity is based upon the Reynolds number alone. The Wright brothers ' use of a simple wind tunnel in 1901 to study the effects of airflow over various shapes while developing their Wright Flyer was in some ways revolutionary. It can be seen from

5130-670: The chapel of the Porziuncula to meet Francis. There, her hair was cut, and she exchanged her rich gown for a plain robe and veil. Fully cutting a woman's hair was a symbolic act showing that she was no longer bound by the laws of man or society but rather that she followed the will of God. Francis placed Clare in the convent of the Benedictine nuns of San Paulo, near Bastia. Her father, along with other members of her family, attempted to convince her to return home. At first, they tried to persuade her by enticing her with wealth, and

5225-428: The corners of a square tunnel that can make the flow turbulent. A circular tunnel provides a smoother flow. The inside facing of the tunnel is typically as smooth as possible, to reduce surface drag and turbulence that could impact the accuracy of the testing. Even smooth walls induce some drag into the airflow, and so the object being tested is usually kept near the center of the tunnel, with an empty buffer zone between

5320-539: The development of the airplane. Large wind tunnels were built during World War II, and as supersonic aircraft were developed, supersonic wind tunnels were constructed to test them. Wind tunnel testing was considered of strategic importance during the Cold War for development of aircraft and missiles. Other problems are also studied with wind tunnels. The effects of wind on man-made structures need to be studied when buildings became tall enough to be significantly affected by

5415-414: The direction of smoke from a ship's stack, to whether a given airplane would fly. Progress at Aachen, I felt, would be virtually impossible without a good wind tunnel. When von Kármán began to consult with Caltech he worked with Clark Millikan and Arthur L. Klein. He objected to their design and insisted on a return flow making the device "independent of the fluctuations of the outside atmosphere". It

5510-479: The end of the 19th century, in the early days of aeronautical research, as part of the effort to develop heavier-than-air flying machines. The wind tunnel reversed the usual situation. Instead of the air standing still and an aircraft moving, an object would be held still and the air moved around it. In this way, a stationary observer could study the flying object in action, and could measure the aerodynamic forces acting on it. The development of wind tunnels accompanied

5605-416: The end of the war, Germany had at least three different supersonic wind tunnels, with one capable of Mach 4.4 (heated) airflows. A large wind tunnel under construction near Oetztal , Austria would have had two fans directly driven by two 50,000 horsepower hydraulic turbines . The installation was not completed by the end of the war and the dismantled equipment was shipped to Modane , France in 1946 where it

5700-479: The first enclosed wind tunnel in 1871. Once this breakthrough had been achieved, detailed technical data was rapidly extracted by the use of this tool. Wenham and his colleague John Browning are credited with many fundamental discoveries, including the measurement of l/d ratios, and the revelation of the beneficial effects of a high aspect ratio . Konstantin Tsiolkovsky built an open-section wind tunnel with

5795-679: The formation of a marine layer off the coast that moves inland overnight. These clouds typically retreat out of the valley by midday. The valley is part of a "wind-tunnel -like-corridor" that connects the high desert with the Oxnard Plain on the coast. This funnels the Santa Ana winds which spreads wildfires and has been called one of the "most dangerous wind and fire corridors in Southern California." Characterized by dry hills covered in brush and chaparral , Santa Clarita

SECTION 60

#1732773334228

5890-426: The ground, ate no meat, and observed almost complete silence. This was in accordance with the strict teachings of poverty assigned to Clare by Francis. Francis and Clare believed that through poverty they could become closer to Jesus as they would live the way he did. They were not inconvenienced by this lifestyle, but rather they believed it was a blessing, as they were following in the footsteps of Jesus Christ. For

5985-468: The helmet can cause considerable neck strain on the driver, and flow separation on the back side of the helmet can cause turbulent buffeting and thus blurred vision for the driver at high speeds. The advances in computational fluid dynamics (CFD) modelling on high-speed digital computers has reduced the demand for wind tunnel testing, but has not completely eliminated it. Many real-world problems can still not be modeled accurately enough by CFD to eliminate

6080-457: The most important house in the order, and Clare became its undisputed leader. By 1263, just ten years after Clare's death, the order had become known as the Order of Saint Clare . Unlike the Franciscan friars , whose members moved around the country to preach, Clare's sisters lived in enclosure , since an itinerant life was hardly conceivable at the time for women. Their life consisted of manual labour and prayer. The nuns went barefoot, slept on

6175-423: The need for physical tests in wind tunnels. Air velocity and pressures are measured in several ways in wind tunnels. Air velocity through the test section is determined by Bernoulli's principle . Measurement of the dynamic pressure , the static pressure , and (for compressible flow only) the temperature rise in the airflow. The direction of airflow around a model can be determined by tufts of yarn attached to

6270-478: The noble family of Fiumi, and was a very devout woman who had undertaken pilgrimages to Rome, Santiago de Compostela , and the Holy Land . Later in life, after being widowed, Ortolana entered Clare's monastery. Clare's younger sisters, Beatrix and Catarina, followed her into religious life. (The latter took the name Agnes and became an early abbess in the order. She established it in additional communities, and

6365-473: The northwest, Sierra Pelona Mountains and Angeles National Forest to the north and northeast, San Gabriel Mountains to the east and southeast, and Santa Susana Mountains to the south and southwest, and Ventura County and the Santa Clara River Valley to the west. To the west-northwest lies the Topatopa Mountains . Santa Clarita Valley is connected to a wide array of other nearby valleys:

6460-417: The paint at that point. Pressure distributions can also be conveniently measured by the use of pressure-sensitive pressure belts , a recent development in which multiple ultra-miniaturized pressure sensor modules are integrated into a flexible strip. The strip is attached to the aerodynamic surface with tape, and it sends signals depicting the pressure distribution along its surface. Pressure distributions on

6555-421: The privileges of nobility through marriage, but she resisted each attempt, professing that she would have no other husband but Jesus Christ. Finally, when they tried to use force she clung to the altar of the church and threw aside her veil to show her cropped hair. It was only after seeing her cropped hair that her family relented and left her in peace. In order to provide the greater solitude Clare desired,

6650-468: The saint, Pope Urban IV officially changed the name of the Order of Poor Ladies to the Order of Saint Clare in 1263. On her deathbed, Clare was heard to say to herself, "Go forth in peace, for you have followed the good road. Go forth without fear, for He Who created you has made you holy, has always protected you, and loves you as a mother. Blessed be You, my God, for having created me." Some 600 years later in 1872, Clare's relics were transferred to

6745-403: The sheer volume and speed of air movement required, the fans may be powered by stationary turbofan engines rather than electric motors. The airflow created by the fans that is entering the tunnel is itself highly turbulent due to the fan blade motion (when the fan is blowing air into the test section – when it is sucking air out of the test section downstream, the fan-blade turbulence is not

6840-424: The test model with beams, strings, or cables. The pressure distributions across the test model have historically been measured by drilling many small holes along the airflow path, and using multi-tube manometers to measure the pressure at each hole. Pressure distributions can more conveniently be measured by the use of pressure-sensitive paint , in which higher local pressure is indicated by lowered fluorescence of

6935-413: The test vehicle to simulate the moving road, and very similar devices are used in wind tunnel testing of aircraft take-off and landing configurations. Sporting equipment has also studied in wind tunnels, including golf clubs, golf balls, bobsleds, cyclists, and race car helmets. Helmet aerodynamics is particularly important in open cockpit race cars such as Indycar and Formula One. Excessive lift forces on

7030-543: The valley: College of the Canyons , California Institute of the Arts , and The Master's University . Clare of Assisi Chiara Offreduccio (16 July 1194 – 11 August 1253), known as Clare of Assisi (sometimes spelled Clara , Clair or Claire ; Italian : Chiara d'Assisi ), is an Italian saint who was one of the first followers of Francis of Assisi . Inspired by the teachings of St. Francis, she founded

7125-469: The whole process took two years, the examination of Clare's miracles took just six days. On 26 September 1255, Pope Alexander IV canonized Clare as Saint Clare of Assisi. Construction of the Basilica of Saint Clare was completed in 1260, and on 3 October of that year Clare's remains were transferred to the newly completed basilica where they were buried beneath the high altar . In further recognition of

7220-459: The wind stream is upwards for the testing of models in spin situations and the concepts and engineering designs for the first primitive helicopters flown in the US. Later research into airflows near or above the speed of sound used a related approach. Metal pressure chambers were used to store high-pressure air which was then accelerated through a nozzle designed to provide supersonic flow. The observation or instrumentation chamber ("test section")

7315-404: The wind tunnel at Peenemünde was a novel wind tunnel design that allowed for high-speed airflow research, but brought several design challenges regarding constructing a high-speed wind tunnel at scale. However, it successfully used some large natural caves which were increased in size by excavation and then sealed to store large volumes of air which could then be routed through the wind tunnels. By

7410-435: The wind. Very tall buildings present large surfaces to the wind, and the resulting forces have to be resisted by the building's internal structure or else the building will collapse. Determining such forces was required before building codes could specify the required strength of such buildings and these tests continue to be used for large or unusual buildings. Wind tunnel testing was first applied to automobiles as early as

7505-583: The world at that time at the Washington Navy Yard. The inlet was almost 11 feet (3.4 m) in diameter and the discharge part was 7 feet (2.1 m) in diameter. A 500 hp (370 kW) electric motor drove the paddle type fan blades. In 1931 the NACA built a 30 by 60 feet (9.1 by 18.3 m) full-scale wind tunnel at Langley Research Center in Hampton, Virginia. The tunnel was powered by

7600-550: Was Theodore von Kármán 's teacher at Göttingen University and suggested the construction of a wind tunnel for tests of airships they were designing. The vortex street of turbulence downstream of a cylinder was tested in the tunnel. When he later moved to Aachen University he recalled use of this facility: I remembered the wind tunnel in Göttingen was started as a tool for studies of Zeppelin behavior, but that it had proven to be valuable for everything else from determining

7695-468: Was ranked as a Double (as in the Tridentine calendar ) or, in the terminology adopted in 1960, a Third-Class Feast (as in the General Roman Calendar of 1960 ). The 1969 calendar revision removed the feast of Tiburtius and Susanna from the calendar, finally allowing the memorial of Saint Clare to be celebrated on 11 August, the day of her death. Construction of the Basilica di Santa Chiara began

7790-460: Was an arrangement followed by a number of wind tunnels later built; in fact the open-return low-speed wind tunnel is often called the Eiffel-type wind tunnel. Subsequent use of wind tunnels proliferated as the science of aerodynamics and discipline of aeronautical engineering were established and air travel and power were developed. The US Navy in 1916 built one of the largest wind tunnels in

7885-522: Was completed in 1930 and used for Northrop Alpha testing. In 1939 General Arnold asked what was required to advance the USAF, and von Kármán answered, "The first step is to build the right wind tunnel." On the other hand, after the successes of the Bell X-2 and prospect of more advanced research, he wrote, "I was in favor of constructing such a plane because I have never believed that you can get all

7980-409: Was declared a saint herself in the mid-18th century.) As children, Clare and her sisters were taught the ways of Christianity by their mother; they all became very religious and devoted to prayer. When Clare was 12 years old, her parents wanted her to marry a wealthy young man; however, she protested and said that she did not want to marry until she turned 18. As a teen, she heard Francis preach during

8075-447: Was dedicated to Saint Clare, as well as her namesake city and its cathedral, Catedral de Santa Clara de Asís . Columbus's ship known as Niña , which visited Cuba twice, was officially named Santa Clara . Clare is one of five characters in the oratorio Laudato si' , composed in 2016 by Peter Reulein on a libretto by Helmut Schlegel , the others being an angel, Mary , Francis of Assisi, and Pope Francis . Clare of Assisi

8170-413: Was known in her lifetime as the "Order of Poor Ladies of San Damiano". San Damiano is traditionally considered the first house of this order; it may have been affiliated with an existing network of women's religious houses organised by Hugolino (who later became Pope Gregory IX ). Hugolino wanted San Damiano as part of the order he founded because of the prestige of Clare's monastery. San Damiano emerged as

8265-551: Was lacking the notions of induced drag and Reynolds numbers . However, the whirling arm does not produce a reliable flow of air impacting the test shape at a normal incidence. Centrifugal forces and the fact that the object is moving in its own wake mean that detailed examination of the airflow is difficult. Francis Herbert Wenham (1824–1908), a Council Member of the Aeronautical Society of Great Britain , addressed these issues by inventing, designing and operating

8360-456: Was located in a suburb of Paris, Chalais-Meudon , France. It was designed to test full-size aircraft and had six large fans driven by high powered electric motors. The Chalais-Meudon wind tunnel was used by ONERA under the name S1Ch until 1976 in the development of, e.g., the Caravelle and Concorde airplanes. Today, this wind tunnel is preserved as a national monument. Ludwig Prandtl

8455-412: Was moved to Auteuil, a suburb of Paris, where his wind tunnel with a two-metre test section is still operational today. Eiffel significantly improved the efficiency of the open-return wind tunnel by enclosing the test section in a chamber, designing a flared inlet with a honeycomb flow straightener and adding a diffuser between the test section and the fan located at the downstream end of the diffuser; this

8550-511: Was navigated and named on her feast day in 1679. The Saint Clair River , St. Clair Shores, Michigan , and St. Clair County, Michigan were also consequently named for her. Mission Santa Clara , founded by Spanish missionaries in Northern California in 1777, has given its name to the university , city , county and valley in which it sits, nicknamed " Silicon Valley " since the 1970s. Southern California's Santa Clara River

8645-425: Was poured on 22 June 1942 on a site that eventually would become Calspan , where the wind tunnel still operates. By the end of World War II, the US had built eight new wind tunnels, including the largest one in the world at Moffett Field near Sunnyvale, California, which was designed to test full size aircraft at speeds of less than 250 mph (400 km/h) and a vertical wind tunnel at Wright Field, Ohio, where

8740-469: Was re-erected and is still operated there by the ONERA . With its 26 ft (8 m) test section and airspeed up to Mach 1, it is the largest transonic wind tunnel facility in the world. Frank Wattendorf reported on this wind tunnel for a US response. On 22 June 1942, Curtiss-Wright financed construction of one of the nation's largest subsonic wind tunnels in Buffalo, NY. The first concrete for building

8835-560: Was then placed at the proper location in the throat or nozzle for the desired airspeed. In the United States, concern over the lagging of American research facilities compared to those built by the Germans led to the Unitary Wind Tunnel Plan Act of 1949, which authorized expenditure to construct new wind tunnels at universities and at military sites. Some German war-time wind tunnels were dismantled for shipment to

8930-424: Was very shy and did not like giving orders. On the rare occasions when she would give orders, she would do so with great humility and shyness. Clare would purposefully save the most tedious tasks for herself because she always wished to take care of her sisters. Clare sought to imitate Francis's virtues and way of life so much so that she was sometimes titled alter Franciscus , 'another Francis'. She also played

9025-683: Was very similar to the Rule of Saint Benedict , which was the common rule that monasteries followed. Clare vigorously fought to keep her rule of strict poverty. Ultimately, when the other priests and bishops refused to accept her rule of strict poverty, she sought to get a special privilege from the pope. If granted, this special privilege of poverty ( "Privilegium Paupertatis" ) from the pope would allow her order to keep living in strict poverty as they wanted. But, although Innocent III had approved Clare's privilege and his successor Honorius III had no problem with it, Gregory IX, successor of Honorius III did have

#227772