Technical data
Type TSh-1
Function Ground attack
Year 1931
Crew 2
Engines 1*600hp(?) BMW-VI
Empty weight 2060kg
Loaded weight 3300kg
Length 9.5m
Wingspan 14.2/13.0m
Wing area 48.5m2
Armament
Guns 10*mg7.62mm PV-1
2-engine cowling, 8-under the wings
2mg*7.62mm DA on turret
Bombs Mechanical dispenser for 300 hand grenades

TSh-1-1, TsKB-6, D.P.Grigorovich(?)/TsKB

TSh-1 23k b/w photo from the "History of aircraft construction in the USSR", Vol.1 p.445

Aircraft of the R-5 line, evolved (actually rebuilt) from the LSh. TSh-1 was a biplane of mixed construction. R-5. Front section of fuselage was built as an armor tab, protecting engine, radiators, main fuel tank, pilot and gunner cockpits. Serious disadvantage was that original tube frame of the front fuselage and engine mounts remained almost unchanged, and armor did not carry serious structural role as it could do.

Armor tab was assembled of flat or cylindrical pieces, thickness from 6mm below the fuselage to 4mm above. First aircraft was built with wielded armor, but it took too much efforts to accomplish. Armor was cracking, twisting... This approach was abandoned. Next set of armor was ordered with holes for screws (making holes on-site also was not that easy!). Total weight of the armor tab was 520kg.

Additional dropable unprotected fuel tanks were placed between struts of the lower wing.

Tail section had wielded tube frame, covered with fabric.

Wings and landing gear were taken from the R-5 and strengthened.

Flight test of first two TSh-1 started in January 1931 (pilots B.L.Bukhgots, Yu.I.Piontkovsky, M.A.Volkovojnov ant others form NII VVS). General performance was normal, but climb was slow and Takeoff Roll was too long due to weight and poor aerodynamics of the armor.

First flights revealed that engine cooling is not efficient enough, and it was too hot in the cockpits. This problem was quickly solved by coolant replacement. Weapon systems (designed by A.V.Nadashkevich) performed above any expectations.

Two built. Improved pre-series aircraft became the TSh-2;


References:
  • "History of aircraft construction in the USSR", Vol.1 p.445

  • More links...
  • TSh-1, Grigorovich

  • Modified May 13, 1997 Back to
    Main Gate