XV-15 litho - NASA's History Office

List of Figures
Figure 1 Leonardo da Vinci 15th century helical air screw flying machine.
Figure 2 Illustration of vertical and short takeoff and landing (V/STOL)
aircraft developed by the McDonnell Aircraft Company in the
mid-1960s.
Figure 3 Hover vertical lift efficiency as a function of disc loading.
Figure 4 McDonnell XV-1 compound helicopter.
Figure 5 Sikorsky XV-2 convertible aircraft.
Figure 6 Bell Helicopter XV-3 tilt rotor aircraft.
Figure 7 Henry Berliner tilt-propeller helicopter.
Figure 8 U.S. patent illustration of George Lehberger’s 1930 tilting propeller
vertical takeoff “flying machine.”
Figure 9 The Baynes heliplane.
Figure 10 Three-view drawing of the Focke-Achgelis FA 269 convertiplane.
Figure 11 Platt-LePage XR-1A lateral-twin rotor helicopter.
Figure 12 Platt-LePage tilt rotor transport aircraft design.
Figure 13 Illustration from the Haviland Platt patent of the tilt rotor concept.
Figure 14 Transcendental Model 1-G experimental tilt rotor aircraft.
Figure 15 Transcendental Model 2.
Figure 16 York convertiplane.
Figure 17 Bob Lichten (Bell), et al. in front of the XV-3.
Figure 18 XV-3 at Bell, August 11, 1955.
Figure 19 Crash of the XV-3 on October 25, 1956.
Figure 20 Tiedown tests of the XV-3 with protective shields at Bell in
July 1957.
Figure 21 XV-3 in hover at Ames Research Center.
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