Engines mounted beneath the wings are generally tilted through some angle.why?

Question

Engines mounted beneath the wings are generally tilted through some angle.why?

Answer 1

This is called the "Angle of Incidence". There are 4 factors which determine flight. Lift, weight, thrust and drag. If the lift is greater than the weight, and the thrust is greater than the drag, you have achieved flight.The aircraft's engines provide thrust to compensate for the drag, and the "Angle of Incidence" also provides lift by creating a downward thrust, which compensates for the weight. "Voila", we have lift-off !

Answer 2

Both of you need to go back to school. Angle of incidence has nothing to do with the angle engines are mounted and it sure doesn't mean angle of attack. Angle of incidence is simply the angle formed between the pitch axis of the aircraft and the cord line of the wing. Angle of attack is the angle of the cord line and the relative wind. Engines are offset for many reasons all relating to aerodynamic efficiency.

Answer 3

Not really one of the angles I learned about in class last semester...

Air going over the wings does not necessarily travel straight from front to back. Because of the sweep-back, some of the air travels lengthwise down the wing. This partially length-wise travelling air makes the engines take in a greater volume of air if they are angled ever so slightly inward toward the fuselage.

Answer 4

The angle of the engines depends on the airflow around them, the idea typically being to align the axis of the engines with the direction of the airflow.  If the direction of the airflow near the engines is not perfectly parallel to the pitch axis of the airframe, the engines may be mounted at a slight angle.

Angle of incidence is the angle of attack formed by the wings when the longitudinal axis of the airframe is completely horizontal.  On most aircraft, the wings are mounted so as to make this angle greater than zero (i.e., the wings are mounted so that they tilt slightly upward when the aircraft is completely level) to ensure that the wings generate lift even when the aircraft is flying level, and to augment the angle of attack and lift when the pitch angle of the airframe is positive. If the angle of incidence is different from the angle at which the engines are mounted, the engines may appear to be tilted (since their angle compared to a large wing is more obvious than the angle of the wing compared to a small engine).

Answer 5

Your right John B. That has nothing to do with angle of incidence or angle of attack. I would suspect that they are tilted because of the vertical postion of the CG(center of gravity. Because the center of gravity is above the Thrust line it makes the airplane more easier to pitch up if its thrust is slight angled upwards when power is added. When the power is reduced, because of Inertia the aircraft will nose down slightly.

Now tilting the engines would make reductions in this phenomenon that pilots dont really appreciate.

On most engines you will notice fins on the side. At high speed these fins are in place to keep the engines from straining the Pylons during acceleration.

Answer 6

angle of incidence. i'm not gna go into an essay. do an aerospace degree and you will find out