- Aug 17, 2010
- 1,589
- Boat Info
- 2008 44 Sedan Bridge
2017 Avon 380DL RIB w/ Yamaha 40
2022 Sea-Doo GTX LTD
2020 Sea-Doo RXT-X
- Engines
- Twin QSC-500 HO
Haaa!Respectfully, I don't think you are getting this....
Assuming the conveyor is completely drag free and offers no resistance the plane's wheels.... if the thrust of the engines was increased to the point that resistance (gravity and drag) was overcome enough to move the aircraft, the aircraft would not move off the conveyor because as the plane began moving forward on the landing gear the conveyor would begin moving and match the speed of the wheels therefore keeping the plane in a static position. So your statement above is incorrect. Unless the plane/wheels began moving faster than the conveyor speed, at which point the plane will leave the conveyor, begin to increase speed through the air while still on the ground and then, if a speed is met that generates enough lift to make the plane fly, it will take off.
As I said before, it doesn't make any difference if the engines are running full thrust and the wheels turning faster than the speed of sound....if there isn't enough air moving over the wing surface fast enough to generate lift, the plane stays on the ground....period.
Consider a full power stall. A plane's engines can be running at full power but if the angle of attack of the wing surface in relation to the air moving over it becomes too great the wing will lose lift and the plane falls from the sky. Aircraft stalls are one of the first things you learn in pilot training.
Respectfully, you don't get this!! It's not about aerodynamic stall or airfoil performance.
The conveyor wouldn't introduce sufficient drag to hold the plane stationary relative to the non-conveyor ground even if it wasn't zero drag. It is what is known in engineering as a red herring. So you said assume the conveyor is drag free. Go one more step, and using magic levitation, raise the aircraft up so the wheels don't touch the conveyor. Spin the conveyor as fast as you want, or don't. It doesn't matter.
The turbine engines act against the air. The air doesn't know about the conveyor. Neither do the engines.
How about this: Spin the conveyor at 1000MPH. Lower the aircraft onto it slowly such that the wheels spin up. If the conveyor is truly zero friction, you don't even need to touch the throttle to maintain horizontal position. Now the plane is sitting there with a conveyor zipping along under it and the wheels spinning away.
Now throttle-up, and away you go! The moving conveyor is irrelevant. It's the air that matters.
Of course, this plane has solid tires that don't explode!