الموضوع: Aircraft for Amateurs
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قديم 07-07-09, 06:03 PM

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افتراضي Aircraft for Amateurs



 

Aircraft for Amateurs




All aircraft are built with the same basic elements: wings to provide lift, engine(s) to provide motive power, a fuselage to carry the payload and controls, and a tail assembly which usually controls the direction of flight. These elements differ in shape, size, number, and position. The differences distinguish one aircraft type from another.



Aircraft Components

Angle of Attack
(AOA) The angle between the wing and the relative wind. When all else is held constant, an increase in AOA results in an increase in lift. This increase continues until the stall AOA is reached then the trend reverses itself and an increase in AOA results in decreased lift.




Angle of Attack.
Ailerons

Located on the outer part of the wing, the ailerons help the airplane turn. Ailerons are control surfaces which are used to change the bank of the airplane, or roll the airplane. As the ailerons hinge down on one wing, they push the air downwards, making that wing tilt up. This tips the airplane to the side and helps it turn. This tipping is known as They are manipulated from the cockpit by moving the control column (stick) left and right. Right movement rolls the airplane to the right and vice versa. Roll speed is proportional to the amount of stick deflection. Once a desired bank is attained, the stick is centered to maintain the bank.

Airfoil Section

is the cross-sectional shape of the The airfoil section shape and placement on the are directly linked to the airplanes performance.
Bank
The angle between the wings and the horizon, as viewed from the rear of the airplane. An airplane with its wings level has zero degrees of bank.

 

 


 

المنتصر

يقول احد القادة القدماء وهويخاطب جنوده . ( اذا لم تكونوا مستعدين للقتال من أجل ما تروه عزيزاً عليكم , فسوف يأخذه أحد ما عاجلا أو اَجلا , واذا كنتم تفضلوا السلام على الحرية فسوف تخسرونهما معاً , واذا كنتم تفضلوا الراحة والرخاء والسلام على العدل والحرية فسوف تخسروهما جميعا ) .

   

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