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Why are small and private aircraft engines at the back and not under the wing?




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Small aircraft need low-rise wing of the Earth's surface allow manufacturers of the aircraft to reduce the high cockpit to suit your size, so the lower the wing not allowed to put the engines beneath the wing as in the large aircraft, so the best place to put them is in the back of the plane, it is also in the small aircraft, the size of the body of the plane is relatively short allowing manufacturers manufactures wheels fall short, light without causing the plane to strike the tail of the runway during takeoff

Put the engines on the plane's tail features:
- Due to lack of engines on the wing of the plane, the plane suite has a lower percentage of the Drag, giving it a better ratio of lift
- Step proportion of the exposure of the engines for the entry of foreign objects less
- At least the effect of the noise of the engines inside the plane
- Require less effort to lift the plane after take-off due to the effect of the weight of the engines behind the plane
- Need to be relatively small tail because of its proximity to the momentum coming out of the engines and therefore easier to move the plane and diverted.


Disadvantages: 


- Increases the likelihood that the curvature of the wing during flight because of the absence of any heavy object to resist the possibility of bends.
- Resistance wing flap less than if the same happened to the first reason.
- Need special fuel to pull the plane's tail area pumps
- Overweight on the plane's tail
forcing manufacturers to design the tail-shaped English T which is known as T-Tail.

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