1. Is there any lift for aircraft flying vertically straight like a rocket?

Answer 1

As a matter of fact, as long as the wing has curvature and there exists some motion, it would continue to produce a force perpendicular to its chord. Since this doesnot support the weight of the aircraft, it cannot be called "lift"

So the answer is no, in vertical flight, the weight of the aircraft must be supported by the engine(s) alone.

Answer 2

Absolutely. It will actually cause the path, as viewed from the ground, to not be straight up - but moving horizontally (perpendicular to the wings) at a rate that is proportional to the lifting force (now horizontal).

To really see this effect, the plane has to be climbing at a good rate of speed - something above 15,000 fpm for a fighter, or (if you had a big enough engine) about 5,000 fpm for something like a Cessna 182. Why these speeds - it's the speeds at which these airplanes stall in level flight and the wing stops producing lift - same holds true going up.

It's all about "relative wind". The wing has no idea whether the wind it feels is coming ground speed, wind direction, or whatever. It just acts on the result.

Answer 3

There certainly will be a lift when an aircraft flies vertically up, since air flows over its wings. Lift is the sum of all the fluid dynamic forces on a body perpendicular to the direction of the external flow approaching that body. And if you wanted to know if there is any vertical force on the aircraft, then the answer is Yes! the thrust force generated by the rotors of the aircraft willproduce the vertcally upwrd force on the aircraft.

Answer 4

Yes. While it is true that the typical wing stalls (looses lift) when it flies through the air at an angle exceeding around 18° or so to the direction of flight, remember that lift is an effect of the air flowing over the wing regardless of the wing's orientation to the ground. The "trick" is to have enough thrust, (a) to overcome the pull of gravity and, (b) to sustain the necessary airspeed to form the lift over the wing, thus avoiding an aerodynamic stall.

Answer 5

Yes, there is for commercial jets, private jets, and small propeller planes. For fighter jets, it's a different story. Fighter jets wings have flat wings so when they are flying vertical or they are trying to get an accurate shot on their enem, they can't be sailing up a little. Also when they do acrobatics, it would be extremely dangrous if they were going up a little when they are doing a stunt that's 6 inches away from the other jet.

Answer 6

You must compensate for the natural lift of the wings or lift will pull it over like you were trying to loop the aircraft.

Answer 7

a jet airplane is basically a rocket . cut the engine off and it comes down real quick.