Topic Scale Drawing: Constructing the Upper Camber of an Airfoil.
Objective The students will be able to construct the upper camber of an airfoil, given specific data.
Rationale The airfoil’s surface is designed to produce an efficient lifting force. The term airfoil section refers to the shape of a cross section of a wing, and also to the outline of a lifting surface.
Experiments have shown that the shape of the airfoil can affect the performance of the plane. Specifications for constructing an airfoil is supplied by the manufactures, any inaccuracy will mean a change in the plane’s performance.
Demonstration Teacher provides example.
Step 1: Draw the datum line and vertical axis
(figure available in print form)
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Step 2: Mark all sections as given in data.
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Step 3: Mark the distance of the upper camber from the datum line.
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Step 4: At the first station, mark the distance of the upper camber above the datum line.
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Step 5: Mark off the other points, then connect with a smooth line.
Example
(figure available in print form)
Station
Upper camber
