Rocket engine ignition systems are especially critical. See the separate section below concerning the rocket engine. It is a measure of the fuel efficiency of a rocket engine. This was the birth of the modern rocket engine. Provision for the SEPR rocket engine was deleted. "Cold" means "relatively" cold compared with rocket engine exhaust. The NF-104 carried enough oxidizer for approximately 100 seconds of rocket engine operation. Selecting an engine cycle is one of the earlier steps to rocket engine design. This page is an incomplete list of orbital rocket engine data. Its easy ignition makes it particularly desirable as a rocket engine ignitor. The Nomes escape moments before the rocket engine ignites. MRO has twenty rocket engine thrusters on board. Many factors go into choosing a propellant for a liquid propellant rocket engine. In December 1997 it began development of a LOX/kerosene rocket engine. A rocket car is a land rocket vehicle powered by a rocket engine.