1. A more conventional bipropellant could more than double the specific impulse. 2. Pentaborane was also investigated to be used as a bipropellant with nitrogen tetroxide. 3. The missile used Unsymmetrical dimethylhydrazine as a bipropellant in combination with red fuming nitric acid. 4. An R-4D bipropellant rocket motor and four XIPS-25 ion engines provide propulsion. 5. In 1977, the Naval Weapons Center tested the 25mm bipropellant nitric-acid / hydrocarbon gun. 6. Other elements such as the bipropellant components and high-gain antenna were designed specifically for the mission. 7. The "'expander cycle "'is a power cycle of a bipropellant rocket engine. 8. Seventeen liquid fueled, bipropellant rockets were successfully flown by 2006, with altitudes to 11, 000 feet. 9. Spacebus satellites use bipropellant , Stentor and Astra 1K satellites, both of which were subsequently involved in launch failures. 10. The "'gas-generator cycle "'is a power cycle of a bipropellant rocket engine.