Sh-5 aircraft for aerial photography.
In 1928, the main administration of Geodesy and cartography and Geodesic Committee planned an extensive program of works by mapping the USSR, various purpose and scope. Meanwhile, special aircraft, met the new requirements. Specific feature requirements was the availability of a wide angle of view (144°) for camera lenses. In addition, everyone's attention was attracted by the idea of amphibious aircraft, since a large part of the territory to be shooting, had no airfields. In 1930, it was decided to build it.
In April-June 1930, two identical project-land and amphibious (both under two engine 300 HP)-were executed in b. Shavrovym (drawings) and k. a. Wiegand (calculations) under the names of FS-1 and FS-2 (fotosamolety) and successfully carried out through STC UVVS on behalf of CFA RESEARCH INSTITUTE.
FS were in terms of OKB Richard, then by March 1931-in terms of the CDB, where at that time worked in b. Shavrov. After discussions at the Tehsovete decided to unify aircraft TSKB, making one-with extra land combined float. As such, the project was approved in July 1931, and had begun its development in the Marine Department under n-28/29 or SH-5.
The tests were launched March 19, 1934 (skiing) and continued until the end of the year because they had broken the chassis due to a manufacturing defect.
Wingspan, 24.00m
Length, 15.00m
Wing area 7310m2
Mass, empty weight 3150kg, normal takeoff 5000kg
Engine type 2 DD m-22
Power, 2 x 480HP
Maximum speed, 225km/h
Cruising speed, 187 km/h
Range, 1200 km
http://www.airwar.ru/enc/other1/sh5.html
http://aviadejavu.ru/Site/Crafts/Craft31078.htm
http://aviadejavu.ru/Site/Arts/Art5563.htm
I imagine that when amphibious mode in the water, main landing gear is retracted upward.(Please watch three side view drawing.)