Universal Aeronautics and Space Systems(UASS): T.R.A.P Engines!

Universal Aeronautics and Space Systems in collaboration with Kerbal-Tech(K-Tech) presents the T.R.A.P(Tetrahedral Re-expansion Air Propulsor) Engine, the first in a line of new parts. This engine offers good performance at low altitudes, however, it uses a lot of intake air. At higher altitudes, it offers great performance, at the cost of Liquid Fuel.