|astronautix.com||OMV Variable Thrust Engine|
Dry Mass: 6.8 kg. Length: 70.05 cm. Maximum Diameter: 27.13 cm. Mounting: fixed. Engine Cycle: pressure fed. Oxidizer: di-nitrogen tetraoxide at 0.119 kg/sec during maximum Thrust: . Fuel: MMH at 0.0745 kg/sec during maximum Thrust. O/F Ratio 1.64. Thrust: 57.8-578 N in vacuum, with a throttle range ratio of 10:1. Isp: 280-308 sec in vacuum. Expansion Ratio: 125:1. Cooling Method: radiative cooling. Chamber Pressure: 0.75-6.8 atm. Ignition: hypergolic. Burn Time: 28 hours total with a 2800 sec maximum single burn.