Reply #2: I am not a pilot, but there must the vacuum effect [View All]

[DrDebug]

If you go incredibly fast then you create an enormous vacuum behind you which you gives you a lift upwards. For example race cars have an inverted wing to prevent the car from taking off ( http://people.bath.ac.uk/ip206/Aerodynamic%20in%20car%20design/General%20Principles%20of%20Aerodynamics.htm )

So you need to pull the airplane down, but that's the problem with flying that low. The point is really the speed, if you go "slow" then you could very well keep the plane flying at a low altitude, but at speeds like 500mph.

The take off speed for the 757-200 is 140-145kts (~165mph) which is at least THREE times slower then the above mentioned speed. ( http://www.jersey-va.co.uk/Aircraft-specs/boeing_757.htm ) This website also mentions Vat 137-140 knots Landing @ Runway Threshold Speed @ MLW full flap/Gear down and if that is the Threshold then there is bound to be a Electronic Speed Limit set up somewhere or at least some flashing lights if you exceed it by too much. It also says:

* DO NOT Exceed 250kts @ or Below 10,000ft Altitude. *

And the altitude was what 10 ft??

Edit: DO NOT Exceed added