[spunkets]

Re: push against

Push refers to the direction of the force. If the force is derived from an IC engine, the force out of the trans is applied to either the air, water, or some hard surface. The force is accurately described as a push. The surface it acts against also exerts a push in the opposite direction. If it's a jet the walls of the motor do the pushing, by directing the hot gases pushing on it.

[cinFLA]

If it said "push the air" I would have less disagreement but it says "push against". How is the heck can the road push the car???????

[Regulator]

Most of the force in a low bypass ratio jet engine is transmitted by the pressure on the turbine blades themselves, which of course react out their force on the shaft, which reacts against its bearing, which reacts against the shroud, which reacts against the pylon, which reacts against the airframe...resulting in "we be movin'!"