If you take an aeroplane engine and push it faster than it can go will it create drag ?

Question

In detail: Say you have a prop plain or even a Jet and its top speed is 100mph and the propeller / Fan spins at 10000RPM. If the plain going into a dive but the propeller / fan can not spin any faster does it then just create drag ? b) if you could spin it faster or just fast enough could make it so that the effect of the rotor / fan is essentially zero. ie. the effect of it being there causes no change in drag.

Answer 1

Yes and yes   You seem to understand it depends on the speed of the air vs the speed of the prop .  It either acts like a fan and pushes the air or like a windmill and the air pushes it

Answer 2

Your question doesn't really make a lot of sense.

Answer 3

No, you don't do that even in dreams, nobody in his right mind overdoes an engine.

Answer 4

oh yes, in case you operate a propeller equipped plane, than at certain prop pitch settings the propeller "drives" the engine instead of the usual engine driving the propeller. imagine a dead engine flying - the propeller is usually still linked to the engine and turns itself and the engine, too. thus, the flag /i am not sure about the proper english term/ setting is necessary, where the propeller blades would be setup so that they do not turn.

the same works with insufficient engine thrust and high speeds, such as stall recoveries and other specific flight regimes.

Answer 5

Drag is created during all phases of light, as thrust is just lift created in a horziontal plane, and anytime lift if produced, drag is also created by induced drag..

The are a few things that will happen if you overspeed an engine in a dive..

1. the engine and crankcase will be exceeded, and possibly break.

2. Depending on the airspeed, the blade tips can reach near the speed of sound, thus creating a shockwave that will make the propeller stall, thus a dive would be not recoverable..

3.  The airplane will usually have structual failure before the engine and prop will come off, so thus your in a free fall to the earth.

4. The aircraft will accelerate towards the earth until terminal velocity is reached, that is air pressure and  drag equals the pull of gravity and the combined thrust pulling hte aircraft into the ground.

5. Drag is the square of lift, so everytime airspeed is doubled, drag increased 4X.

Answer 6

yes, and no...

it doesn't "push" air, it just reduces the air pressure in front to near zero, and causes the air pressure in back to "push" forward....

Answer 7

One of the most effective ways to get down fast without overspeeding in the King Air is to sellect beta on the props. That's flat pitch and it's like putting two barn doors out in front of the wings. You could even reverse them. Never had the guts though.

Answer 8

Yes, your statements are completely correct. If an engine cannot spin faster and you are over its maximum speed, it will just create drag, like any non-thrust producing piece of the aircraft. And yes, you can outrule an engine. Maybe not the best example but when you're doing practised forced landings with constant speed propeller equiped aircraft, the flight instructor will increase the throttle a little bit when you say you are feathering the propeller. This is to simulate that the drag of a non powered turning propeller disappears because you feather it. So it is possible.