Quote:
Originally Posted by kermitology
Well we know that air moving over the wings is what provides lift. Are some people suggesting that the engines are what generate the airflow?
They certainly would cause air to flow over the wings, but I don't think that the engines alone (say on the Learjet 36 I fly on almost daily) would generate the 150+ knots required for takeoff.
I think it's busted. I'm going to ask my pilots tomorrow..
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Yeah there's no way that the engines provide the airflow for liftoff, the question is if the plane can break the forces that hold it back on the tread mill.
There is a point where the fictional forces will be overcome by the thrust, thusly giving the plane forward momentum. Here is where I don't get the debate. Why is there a question? If the plane can be free to move forward on the treadmill, the treadmill is neglected and it becomes like a normal takeoff. Of course it will take more force but it can happen.
This is accounting for the fictional force being less than the thrust provided by the prop/turbine.