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Unformatted text preview: 2 . Determine the wing span and average chord (Wing area/Wing span) for each of these nine combinations. Present your results by filling in the empty squares below. Although the calculations are not intensive or long, you may wish to use to use a programmable calculator, or a spreadsheet program. Wing Span (in feet): P/L Ratio=0.15 P/L Ratio=0.20 P/L Ratio=0.25 GW/S=100 lb/ft 2 GW/S=120 lb/ft 2 GW/S=150 lb/ft 2 Average Chord (in feet): P/L Ratio=0.15 P/L Ratio=0.20 P/L Ratio=0.25 GW/S=100 lb/ft 2 GW/S=120 lb/ft 2 GW/S=150 lb/ft 2 Hint: Consider the payload ratio of 0.15, and GW/S= 100 lb/ft 2 as an example. 1. Since the payload is 10,000 lb, GW= 10,000/0.15 = 66,666 lb 2. Since GW/S = 100 lb/ft 2 , and GW = 66,666 lb, Wing area S=666.66 ft 2 . 3. Since Aspect ratio = (span) 2 /Wing Area = 5, Span= [ 5 x 666.66 ft 2 ] 1/2 = 57.73 feet 4. Average Chord = Wing Area/ Span = 666.66 ft 2 /57.73 ft= 11.55 feet. Repeat these calculations for the other P/L ratios and wing loadings....
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- Spring '07