f17582d2_engine___Free_net_encyclopedia__Type
[Description] Carries all propellants onboard, emits jet for propulsion [Advantages] Very few moving parts, Mach 0 to Mach 25+, efficient at very high speed (> Mach 10.0 or so), thrust/weight ratio over 100, relatively simple, no complex air inlet, high compression ratio, very high speed exhaust, good cost/thrust ratio, works best exoatmospheric which is kinder on vehicle structure at high speed. [Disadvantages] Needs lots of propellant- very low specific impulse- typically 100-450 seconds. Extreme thermal stresses of combustion chamber can make reuse harder. Typically requires carrying oxidiser onboard which increases risks. [Type] 
Rocket
Jet engine - Free net encyclopedia
Type