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Soyuz 11A511U / Ikar
Part of R-7
Soyuz-U / Globalstar
Soyuz-U / Globalstar
Credit: TsSKB
Russian orbital launch vehicle. Standard Soyuz universal booster with the Ikar upper stage, derived from the propulsion system for the Kozlov Yantar series of spy satellites.

Status: Design 1999. Payload: 4,100 kg (9,000 lb). Thrust: 4,030.00 kN (905,980 lbf). Gross mass: 305,000 kg (672,000 lb). Height: 43.40 m (142.30 ft). Diameter: 2.95 m (9.67 ft). Apogee: 450 km (270 mi).

The Ikar upper stage was part of the Soyuz launch system upgrade policy. Built by TsSKB in Samara, this fourth stage was derived from an existing flight-proven module that has been used successfully more than 30 times on Yantar spy satellite missions. Equipment and subsystems from the module were used to the maximum extent to limit new development. Modifications were primarily limited to some of command/control equipment and certain mechanical/electrical interfaces with the payload. Ikar had a mass of 820 kg. and was located under the payload fairing. With an in-flight restart capability of up to 50 times, it can handle deployment of multi-satellite payloads to different orbits. The stage can be controlled from the ground or in an operate autonomous mode. The stage was powered by a 17D61 engine from KB Melnikov and had a vacuum thrust of 2.943 kN. It operated on UDMH/N2O4 propellant and had 16 vernier engines for flight control.

LEO Payload: 4,100 kg (9,000 lb) to a 450 km orbit at 51.80 degrees. Payload: 2,750 kg (6,060 lb) to a 800 km SSO. Launch Price $: 50.000 million in 1999 dollars.

Stage Data - Soyuz 11A511U / Ikar



Family: orbital launch vehicle. Country: Russia. Engines: 17D61. Stages: Ikar stage, Soyuz 11A511U-0, Soyuz 11A511U-1, Soyuz 11A511U-2. Agency: Korolev bureau.

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