20 research outputs found
Burma – light plane operations of the First Air Commando Group.
No full textTransmitted herewith is a partial summary of light plane operations of the First Air Commando Group in support of the 3rd Indian (Wingate) Division. The report was prepared by 1st Lt. William C. Lehecka, who commanded the light plane detachment at "Aberdeen", in North Burma, for several weeks. 26 May 1944
Army Air Corps on Commando Course (ca. 1943)
No full textThis photograph shows a group of soldiers from Army Air Corps going through the Commando Course on the campus of Springfield College as part of their training for World War II. In this photo three soldiers have jumped to the ground and two are on top of the obstacle and ready to jump. The obstacle is a sloped wooden wall. In the background you can just see the tower of Judd Gymnasia over the top of the obstacle. According to the stamp on the back of the photograph, it was taken in July 1943.At the start of World War II, Springfield College served as training grounds for the Army Air Corps, which allotted the college 75,000 to bring the college up to the mark of a naval hospital, and the first contingent of one hundred and fifty patients arrived on September 22, 1944. It was estimated that five hundred patients could be served. Alumni Hall was used as the hospital, and the old dormitory (now called the Administration Building) became administrative offices and housing for nurses and WAVES (Women Accepted for Volunteer Emergency Service).On the back of the photograph is stamped "JUL 1943" and handwritten, "Commando Course"
Gliding swifts attain laminar flow over rough wings
No full textSwifts are among the most aerodynamically refined gliding birds. However, the overlapping vanes and protruding shafts of their primary feathers make swift wings remarkably rough for their size. Wing roughness height is 1–2% of chord length on the upper surface—10,000 times rougher than sailplane wings. Sailplanes depend on extreme wing smoothness to increase the area of laminar flow on the wing surface and minimize drag for extended glides. To understand why the swift does not rely on smooth wings, we used a stethoscope to map laminar flow over preserved wings in a low-turbulence wind tunnel. By combining laminar area, lift, and drag measurements, we show that average area of laminar flow on swift wings is 69% (n = 3; std 13%) of their total area during glides that maximize flight distance and duration—similar to high-performance sailplanes. Our aerodynamic analysis indicates that swifts attain laminar flow over their rough wings because their wing size is comparable to the distance the air travels (after a roughness-induced perturbation) before it transitions from laminar to turbulent. To interpret the function of swift wing roughness, we simulated its effect on smooth model wings using physical models. This manipulation shows that laminar flow is reduced and drag increased at high speeds. At the speeds at which swifts cruise, however, swift-like roughness prolongs laminar flow and reduces drag. This feature gives small birds with rudimentary wings an edge during the evolution of glide performance
Army Air Corps on Commando Course (ca. 1943)
No full textThis photograph shows a group of soldiers from Army Air Corps going through the Commando Course on the campus of Springfield College as part of their training for World War II. In this photo three soldiers have jumped to the ground and two are on top of the obstacle and ready to jump. The obstacle is a sloped wooden wall. In the background you can just see the tower of Judd Gymnasia over the top of the obstacle. According to the stamp on the back of the photograph, it was taken in July 1943.At the start of World War II, Springfield College served as training grounds for the Army Air Corps, which allotted the college 75,000 to bring the college up to the mark of a naval hospital, and the first contingent of one hundred and fifty patients arrived on September 22, 1944. It was estimated that five hundred patients could be served. Alumni Hall was used as the hospital, and the old dormitory (now called the Administration Building) became administrative offices and housing for nurses and WAVES (Women Accepted for Volunteer Emergency Service).On the back of the photograph is stamped, "JUL 1943"
Army Air Corps on Commando Course (ca. 1943)
No full textThis photograph shows a group of soldiers from Army Air Corps going through the Commando Course on the campus of Springfield College as part of their training for World War II. In this photo three soldiers have jumped to the ground and one is on top of the obstacle and ready to jump. The obstacle is a sloped wooden wall. In the background you can just see the tower of Judd Gymnasia over the top of the obstacle. According to a duplicate print of this photograph, the photograph was taken in July 1943.At the start of World War II, Springfield College served as training grounds for the Army Air Corps, which allotted the college 75,000 to bring the college up to the mark of a naval hospital, and the first contingent of one hundred and fifty patients arrived on September 22, 1944. It was estimated that five hundred patients could be served. Alumni Hall was used as the hospital, and the old dormitory (now called the Administration Building) became administrative offices and housing for nurses and WAVES (Women Accepted for Volunteer Emergency Service)
Army Air Corps on the Commando Course (ca. 1943)
No full textThis photograph shows a group of four soldiers from Army Air Corps climbing an obstacle wall on the Commando Course on the campus of Springfield College as part of their training for World War II. In the background of the photo you can see an open field and trees .The photo was taken in July 1943.At the start of World War II, Springfield College served as training grounds for the Army Air Corps, which allotted the college 75,000 to bring the college up to the mark of a naval hospital, and the first contingent of one hundred and fifty patients arrived on September 22, 1944. It was estimated that five hundred patients could be served. Alumni Hall was used as the hospital, and the old dormitory (now called the Administration Building) became administrative offices and housing for nurses and WAVES (Women Accepted for Volunteer Emergency Service).On the back of the photographic print is stamped, "JUL 1943"
Army Air Corps cadets climbing up wall on Commando Course (ca. 1943)
No full textThis photograph shows a group of four soldiers from Army Air Corps climbing an obstacle wall on the Commando Course on the campus of Springfield College as part of their training for World War II. In the background of the photo you can see an open field and trees .The photo was taken in July 1943.At the start of World War II, Springfield College served as training grounds for the Army Air Corps, which allotted the college 75,000 to bring the college up to the mark of a naval hospital, and the first contingent of one hundred and fifty patients arrived on September 22, 1944. It was estimated that five hundred patients could be served. Alumni Hall was used as the hospital, and the old dormitory (now called the Administration Building) became administrative offices and housing for nurses and WAVES (Women Accepted for Volunteer Emergency Service).On the back of the photographic print is stamped, "JUL 1943"
Soldiers climbing over wall on Commando Course (ca. July 1943)
No full textThis photograph shows a group of soldiers from Army Air Corps tackling an obstacle on the Commando Course on the campus of Springfield College as part of their training for World War II. The soldiers are climbing up and over a straight wooden ladder-like wall. Behind the obstacle, other soldiers are watching the soldiers who are climbing. The photo was thought to be taken in July 1943At the start of World War II, Springfield College served as training grounds for the Army Air Corps, which allotted the college 75,000 to bring the college up to the mark of a naval hospital, and the first contingent of one hundred and fifty patients arrived on September 22, 1944. It was estimated that five hundred patients could be served. Alumni Hall was used as the hospital, and the old dormitory (now called the Administration Building) became administrative offices and housing for nurses and WAVES (Women Accepted for Volunteer Emergency Service)
Soldiers climbing over wall on Commando Course (ca. 1943)
No full textThis photograph shows a group of soldiers from Army Air Corps tackling an obstacle on the Commando Course on the campus of Springfield College as part of their training for World War II. The soldiers are climbing and over a straight wooden ladder-like wall. Behind the obstacle, soldiers are watching the soldiers climbing the obstacle. The photo was thought to be taken in 1943At the start of World War II, Springfield College served as training grounds for the Army Air Corps, which allotted the college 75,000 to bring the college up to the mark of a naval hospital, and the first contingent of one hundred and fifty patients arrived on September 22, 1944. It was estimated that five hundred patients could be served. Alumni Hall was used as the hospital, and the old dormitory (now called the Administration Building) became administrative offices and housing for nurses and WAVES (Women Accepted for Volunteer Emergency Service)
Soldiers climbing over obstacle on Commando Course (ca. 1943)
No full textThis photograph shows a group of soldiers from Army Air Corps tackling an obstacle on the Commando Course on the campus of Springfield College as part of their training for World War II. The soldiers are trying to climb up a wall made like a ladder. There are some soldiers standing and watching the soldiers climbing.At the start of World War II, Springfield College served as training grounds for the Army Air Corps, which allotted the college 75,000 to bring the college up to the mark of a naval hospital, and the first contingent of one hundred and fifty patients arrived on September 22, 1944. It was estimated that five hundred patients could be served. Alumni Hall was used as the hospital, and the old dormitory (now called the Administration Building) became administrative offices and housing for nurses and WAVES (Women Accepted for Volunteer Emergency Service)
