Does placing the engine on the fuselage like the MD80 have an advatage over a engine mounted on the wing B-737

Answer 1

The advantages for fuselage mounted engines are:-

Greater CLmax due to elimination of wing-pylon and exhaust-flap interference, i.e., no flap cut-outs.
Less drag, particularly in the critical take-off climb phase, due to eliminating wing-pylon interference.
Less asymmetric yaw after engine failure with engines close to the fuselage.
Lower fuselage height permitting shorter landing gear and airstair lengths.

Disadvantages are:-

The center of gravity of the empty airplane is moved aft - well behind the center of gravity of the payload. Thus a greater center of gravity range is required. This leads to more difficult balance problems and generally a larger tail.
The wing weight advantage of wing mounted engines is lost.
The wheels kick up water on wet runways and special deflectors on the gear may be needed to avoid water ingestion into the engines.
At very high angles of attack, the nacelle wake blankets the T-tail, necessary with aft-fuselage mounted engines, and may cause a locked-in deep stall. This requires a large tail span that puts part of the horizontal tail well outboard of the nacelles.
Vibration and noise isolation for fuselage mounted engines is a difficult problem.
Aft fuselage mounted engines reduce the rolling moment of inertia. This can be a disadvantage if there is significant rolling moment created by asymmetric stalling. The result can be an excessive roll rate at the stall.

Answer 2

No.
The engines of an MD-80 are small, but very powerful; about the same size as the 737-200's engines.
However, if the engines are placed on the fuselage, like the MD-80's, more fuel can be put into the plane, and the wings have liess drag on them.

Answer 3

I am not sure on this but I have heard that aft mounted engines are quieter in the cabin. (at least if you are in the foreward section) So if you happen to be lucky enough to be in first class then there wont be quite as much engine noise.

Also the MD-90 has engines that are much quieter than the MD-80 series (also a lot bigger)

So to answer your question passenger comfort would be one advantage of aft, fuselage mounted engines.

Answer 4

sheet of ice off the wings go Right into engines so i say no










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