Ar-2/SB-RK/RK/KR, A.A.Arhangelsky


U
ltimate development of the SB line, intended as dive-bomber.
In 1939 it became obvious that speed of the SB series has to be increased. Previous attempt - the MMN failed to satisfy all requirements, but was re-engined, equipped with new VISh-22E propeller. Radiators moved inside the wing with intakes on the leading edge - and aircraft became the SB-RK.
Still it was not enough, and instead of pushing more modification SB-RK was given new role - dive bomber. Results were good, and aircraft was in production (1940- 1941) until superior Pe-2 replaced it.
Last attempt to keep SB series flying was the SB-B , but it did not enter production.
~200 built under designation Ar-2 (with single machinegun in the nose).
40k drawing, from collection by Vadim Krivosheyev 'Watson'; Used for background.

See related aircraft on the Main SB page;
References:
  • "History of aircraft construction in the USSR" by V.B.Shavrov, Vol.2 p.17-18
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  • Ar-2, Arhangelsky
  • SB-RK, Arhangelsky
  • Technical data
    Type SB-RK Ar-2 Ar-2
    Function Dive bomber
    Year 1940 1941
    Crew 3
    Engines 2*1100/1050hp klimov M-105R
    Wing Span 18.0m
    Wing Area 48.2m2
    Length 12.27m 12.50m 12.78m
    Empty Weight 4430kg 5106kg -
    Loaded Weight 6300kg 6600kg 6500kg
    Maximum Weight - 8150kg -
    Wing Load 131kg/m2 139kg/m2 135kg/m2
    Speed (0m) 410km/h 415km/h 443km/h
    Speed (4700m) 480km/h 475km/h -
    Speed (5000m) - - 512km/h
    Climb (5000m) 7.25min 7.1min 6.55min
    Ceiling 10100m 10000m 10500m
    Range 1500km - -
    Armament
    Guns 4*mg7.62mm ShKAS 3*mg7.62mm ShKAS
    Bombs (inside) 600kg
    Bombs (external) 1500kg 1000kg 1000kg
    Modified April 7, 1997
    by Alexandre Savine;
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