Editing Aircraft engine (section)

====Rocket turbine engine====
{{main|Rocket turbine engine}}
A rocket turbine engine is a combination of two types of propulsion engines: a [[liquid-propellant rocket]] and a turbine jet engine. Its [[power-to-weight ratio]] is a little higher than a regular jet engine, and works at higher altitudes.<ref>"Analysis of the effect of factors on the efficiency of liquid rocket turbine" by  Zu, Guojun; Zhang, Yuanjun ''Journal of Propulsion Technology ''  no. 6, p. 38-43, 58.[http://adsabs.harvard.edu/abs/1992JPT......R..38Z]</ref>