RAMJET ENGINE - An aerodynamic duct in which fuel is burned to produce a high-velocity propulsive jet. It needs to be accelerated to high speed before it can become operative.
RATO - Rocket-assisted take-off virtually the same as JATO.
Ramjets A ramjet engine produces thrust by burning a fuel at high pressure and exhausting the gas through a nozzle. The high pressure is produced by the forward speed of the vehicle.
 See also: Plane, NASA, Flight, Power, Aircraft
  
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