Sh-5, FS-1, FS-2 by V.B.Shavrov and K.A.Vigand, TsKB

24k b/w Sh-5 with underfuselage float installed, "History of aircraft construction in the USSR" by V.B.Shavrov, Vol.1 p.475

I
n 1928 wide program of the USSR territory mapping started. Aviation supposed to play large role in this program, providing aerial photography and support of ground groups. No special aircraft for aerial photography existed, variety of available platforms were not well suited for the goal. Camera view was often restricted by cockpit location, obscured by wing struts, wires or landing gear. Conditions for camera operator in tight cockpits of military (or converted) planes like R-5 were far from appropriate for mapping photography.
In early 1929 special task force was established. It accepted V.B.Shavrov's offer of an amphibian cartography, because the wast areas of the USSR had no suitable airfields except rivers and lakes.
In Spring 1930 requirements to the cartography aircraft were formulated. In June projects for amphibian and similar land based aircraft were ready (design by V.B.Shavrov, calculations by K.A.Vigand)1. Aircraft were designated FS-1 and FS-2.
Originally FS project was assigned to Richard's KB, in March 1931 - transferred to TsKB back under V.B.Shavrov's supervision. At that time FS-1 and FS-2 project were joined into single Sh-5 design. It was an amphibian with detachable floats.
Assembly was performed at ZOK NII GVF, plant with very limited capacities. Sh-5 was of mixed design. Fuselage had steel frame with fabric skin. Floats - wooden, covered with fabric with sealant. Wing and tailfin - duralumin with fabric. Landing gear and floats struts - steel tubes with duralumin fairings.
During construction aircraft was made multi-functional. 12 removable passenger seats were installed. Sh-5 could be converted into ambulance with 8 stretchers and medical personal. Large door and roof hatch allowed to use it as a cargo transport when seats/stretchers are removed. Enclosed pilot's cabin was located in the nose, providing adequate view for aerial cartography.
Trials started on March 19, 1934 on skis, interrupted at the end of year when landing gear was broken (manufacturing defect blamed). Despite overall performance was in compliance with requirements, aircraft was abandoned. 5-years old design and layout became more and more obsolete, with little upgrade opportunities.
Aerial cartography niche was occupied at the time by sturdy reliable R-6.
PredecessorsModifications
Aircraft was unique in its concept and had no successors.

ReferencesLinks
  • "History of aircraft construction in the USSR" by V.B.Shavrov, Vol.1 pp.474-475;
  • 1Samoliot, 1931, No3, pp.23-25 (sketches and description);
  • Sh-5, Shavrov
  • Technical data
    Type Sh-5
    Function Land based aerial cartography Amphibian aerial cartography
    Year 1934 1934
    Crew 2 2
    Engines 2*480hp M-22
    Length 15.0m 15.0m
    Wingspan 24.0m 24.0m
    Wing area 73.1m2 73.1m2
    Empty weight 3150kg 3470kg
    Loaded weight 5000kg 5000kg
    Wing load 68.5kg/m2 68.5kg/m2
    Power load 5.2kg/hp 5.2kg/hp
    Speed at 0m 225km/h 213km/h
    Landing Speed 80km/h 80km/h
    Landing Roll 240m 16sec 240m 16sec
    Takeoff Roll 220m 13sec 250m 16sec
    Range 1200km 800km
    Flight Endurance 8.0hmin 5.0hmin
    Ceiling 5400m 4900m
    Climb
    1000m 4min 5min
    2000m 8min 10min
    3000m 13min 16min
    4000m 22min 30min
    Payload
    Fuel+oil 800kg 500kg
    Seats 12 seats or 8 stretchers
    Cargo 1050kg 1030kg
    Created December 10, 1996
    Modified September 28, 1998
    by Alexandre Savine;
    Back to
    Main Gate