As you can see on the photo and 3-view you posted
, Sh-13 wasn't a sailplane. It was a light aircraft designed for pilots' training in long-range raids and for flight range record attempt in its category. It was made of wood and powered by 45-hp Salmson engine. The aircraft had 4 fuel tanks in wings (total capacity 140 l) and two in fuselage (another 100 l) - 240 l overall; it was enough for more than 20 flight hours which allowed to overcome 2400 km distance (another data specify even 25 hours and 3300 km). The aircraft was 2-seat but the place for second crewman was very simply equipped, his seat had canvas backrest; for the record flight, it would be removed and additional fuel tank mounted instead.
The aircraft was tested since April 1939 in Tushino near Moscow, by Pavel Golovin. He was already Hero of Soviet Union, renowned polar aviator, the first Soviet pilot to fly over North Pole (on May 5, 1937). From October 1938 he was a test pilot of Moscow Zavod No.22. A year later Sh-13 first flights, on April 27, 1940 Golovin crashed with Polikarpov SPB...
During tests, Sh-13 demonstrated quite good flight performances but it was one problem. Its engine power allowed takeoff with fuel only for 10 hours. The Salmson wasn't new - it was hardly used, its service life was almost served out; therefore Sh-13 was tested also with another engines - in particular, with opposite Bristol Cherub; but it was even less powerful - 36 hp. There was no possibility to obtain more suitable engine; also there is no info about actual attempts of long-range raids with Sh-13.
Technical data for Sheremetyev Sh-13:
Wing span - 13.0 m
Length - 5.9 m
Wing area - 10.9 m2 (another source: 10.56 m2)
Empty weight - 397 kg
Fuel weight - 175 kg (for 20 flight hours)
Takeoff weight - 663 kg
Powerplant - one Salmson AD-9, 9-cylinder radial, 45 hp
Maximum speed - 180 km/h
Landing speed - 90 km/h
Climbing to 1000 m - 14 minutes
Service ceiling - unknown
Sources:
1. Yegorov V. The Sh-13 / Krylia (Wings) magazine, No.1/2008, p.37-38.
2. Shavrov V.B. History of aircraft designs in USSR, 1938-1950 (
http://base13.glasnet.ru/text/shavrov2/1-30.htm#sh13)