Pentaborane was also investigated to be used as a bipropellant with nitrogen tetroxide. A more conventional bipropellant could more than double the specific impulse. The expander cycle is a power cycle of a bipropellant rocket engine. Inc. (Later TRW, Inc.) to pursue development of monopropellant and bipropellant rocket engines. The gas-generator cycle is a power cycle of a bipropellant rocket engine. The combustion tap-off cycle is a power cycle of a bipropellant rocket engine. However, there is not one universally used propulsion system&colon; monopropellant, bipropellant, ion propulsion, etc. As a bipropellant, is decomposed to burn a fuel as an oxidizer. It also used had 12 bipropellant thrusters for station keeping and attitude control. It is a bipropellant design, using LH2 and LOX. According to Moog-ISP, the A2100 platform uses its LEROS bipropellant Liquid Apogee Engine. A bipropellant propulsion system is a rocket engine that uses a liquid propellent. In 1977, the Naval Weapons Center tested the 25mm bipropellant nitric-acid/hydrocarbon gun. According to Moog-ISP, the 702HP platform uses its bipropellant thrusters. According to Moog-ISP, the SSL 1300 platform uses its bipropellant thrusters.