Design
The SB was an all-metal monoplane powered by two Klimov M-100 12-cylinder water-cooled engines (license production version of Hispano-Suiza 12-Yrds engine) which drove fixed-pitch two-bladed metal propellers. The engines were provided with honeycomb-type frontal radiators enclosed by vertical thermostat-controlled cooling shutters. At an early production stage, the M-100 engine gave place to an improved M-100A engine, driving ground-adjustable three-pitch propellers, with speed being boosted to 423 km/h (263 mph) at 4,000 m (13,000 ft). Because of its broad, high aspect ratio wing, that gave it a good altitude performance – Russian crews nicknamed the SB the "Pterodactyl".
Read more about this topic: Tupolev SB
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“Teaching is the perpetual end and office of all things. Teaching, instruction is the main design that shines through the sky and earth.”
—Ralph Waldo Emerson (1803–1882)
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—For the State of Illinois, U.S. public relief program (1935-1943)