One of the most radical rocket aircraft projects was the Soviet "IVS/ISF"
("Army Escort Fighter"/"Navy Escort Fighter") design. It was proposed by military
engineer Lev Golovin in 1941. Evidently, the world's smallest fighter was designed
as a part of mobile launcher complex comprising a truck carrier, 5-8 meter launcher,
fuel and ammunition stock, a winch and the fighter itself. A crew of three (pilot,
mechanic, driver) was to operate this complex.
The IVS specifications were:
Length - 3m, span - 1.75m, height - 1.05m,
T/O weight - 250-300kg,
Top speed - 1,060km/h
Ceiling - 7,500m
Engine - one Dushkin liquid-fuel rocket (300kg thrust),
assisted during take-off by solid fuel rocket booster(s) (1,000kg thrust).
Armament - single 20-mm ShVAK cannon
Landing equipment comprised the 76 mē parachute and a belly skid absent on the Navy version.
Pilot occupied prone position that reduced the g-load and enabled the climb rate of 250m/sec.
The project was offered for series production but the VVS authorities rejected the idea of a mobile
small interceptor in favor of anti-aircraft artillery.