TEASDALE-BUCKELL vertical lift machine (C. Teasdale-Buckell, RN, HMS Ariadne, Portsmouth and 265 The Strand, London, WC)

   This attempt to achieve vertical flight was made in 1910, the machine being built and reported to have lifted off on test.
   The design was original and covered by patent No.30143/1909. The machine was a high wing monoplane, with the wing tips curving down to meet members supporting the bearings of the twin propeller shafts, thus forming shrouds extending down to their centerlines. Behind, and on the same centerlines, were a pair of 'helically corrugated cylindrical surfaces' or 'helixplanes', also driven by belts or chains from the same central motor. These cylinders were designed to provide lift from the slipstream impinging on the corrugations, at their outboard sides as they rotated, being driven in opposite directions by the crossed drive.
   The pilot sat in the center behind the 30hp motor, which was cooled by a fan; an elevator and tailplane were left as an option to be fitted later if tests indicated the need.

   Data
   Span 14ft
   Area 166 sq. ft
   Length 18ft
   Helix planes 5ft diameter 6ft long
   Corrugations 2ft deep
   Weight 500 lb.
   Speed 70 mph