Passenger/mail delivery aircraft, capable to perform reconnaissance missions in wartime. Low wing
monoplane with retractable landing gear of very uncommon design. Both wing and fuselage had monocoque construction with stainless
steel frame and 0.8 to 2.5mm thick plywood skin.Wing spars - light and elegant 3-D frames, with numerous weight saving
holes. Plywood strips (~40mm wide) were attached to the frame via point-wielded short 'nails'. Then the skin was glued on
Surface quality was very good, whole construction was very light and rigid. Wing airfoil was developed at
TsAGI by F.G.Glass. Flaps could be deployed at angles up to 600.
Aircraft was ready on Fall 1936. Extensive trials were carried out,
in both civil and military configurations. Approximately 300 landings were performed.
No production followed. Looks like project was cancelled with arrest of leading designers.
|Material use in Stal-11|