Encyclopedia Astronautica
FLEXEM



rdflexem.jpg
FLEXEM
Credit: Boeing / Rocketdyne
Rocketdyne exotic ClF3/Hydrazine rocket engine. 48.905 kN. Flexible Energy Management. Pressure-fed. Sustainer 267-4000 lb thrust vacuum, specific impulse 260 seconds. Isp=275s.

Propellant Formulation: ClF5/MHF-5.

Thrust: 48.91 kN (10,994 lbf).
Specific impulse: 275 s.
First Launch: 1968.

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Associated Propellants
  • ClF3/Hydrazine Chlorine trifluoride was another of the extremely reactive and toxic oxidisers tested in the United States in the late 1950's. As in the other cases, it was found that the handling problems and safety risks outweighed the performance benefits. Hydrazine (N2H4) found early use as a fuel, but it was quickly replaced by UDMH. It is still used as a monopropellant for satellite station-keeping motors. More...

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