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LL-1 Rocketplane
LL-1 Rocketplane

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Other Designations: Ts-1. Class: Manned. Type: Rocketplane. Nation: USSR. Agency: NII. Manufacturer: Tsybin.

The LL was a transonic aerodynamic testbed authorised by LII in September 1945. Three were built: the LL-1 with a straight wing; LL-2 with a conventional swept wing; and LL-3 with a forward swept wing. The LL was towed to a 6 km release altitude by a Tu-2 aircraft. After being cast off, it would fire its Kartukov solid rocket engine and accelerate to the edge of the sound barrier, with a camera photographing air flow on the tufted wing. The LL-2 was not finished because contemporary fighter programs were already providing data on swept wing configurations. But in 1946 to 1948 the LL-1 flew 30 times and the LL-3 100 times, with test pilots M Ivanov, Amet-Khan Sultan, Anokhin, and Rybko at the controls.


Specification

Craft.Crew Size: 1. Total Length: 9.0 m. Total Mass: 2,039 kg. Total Propellants: 900 kg. Primary Engine Thrust: 1,500 kgf. Main Engine Propellants: Solid.


LL Chronology


01 September 1945 LL rocket-powered transonic aerodynamic testbed authorised.

In 1946 to 1948 the LL-1 flew 30 times and the LL-3 100 times, with test pilots M Ivanov, Amet-Khan Sultan, Anokhin, and Rybko at the controls.



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Last update 12 March 2001.
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© Mark Wade, 2001 .