Lot 290
A collection of Barnes Wallis' lecture slides mainly about Supersonic flight in fitted numbered wooden boxes (106 slides in 3 boxes) Box E, Miscellaneous drawings, 49 slides Slides 1-27: mainly flight, 1940s to 1950s (2 slides cracked) Slides 21-28: model Swallow and radio control Slides 29-40: Swallow as real aircraft Slides 41-42: missile and launch silo Slides 43-45: supersonic flight drawings Slides 46-48: projectiles, bombs and torpedoes (possibly slide 48 shows Wallis' hydrodynamic torpedo) Slide 49: a futuristic jet aircraft(?) Box I, 46 slides (2 slides broken) Slides 1-26 Cut-away diagram of stratospheric chamber and photos of its construction Slides 27-34 Photos of jet aircraft, jet missile?, jet car? Slides 39-43 Photos of a balloon and a stratospheric balloon Sides 45-50 Miscellaneous Small Box P, 11 slides 2 drawings of Swallow, 1 drawing of Concorde, 1 hypersonic aircraft drawing, 1 airship drawing, 1 ellipsoid drawing, 4 miscellaneous drawings, 1 miscellaneous photo  £100-200