Which of the following is correct for nacelle form factor (FF)?(a) FF = 1+(0.35/f)(b) FF = 1*(0.35/f)(c) FF = 1-(0.35/f)(d) FF = 1/(0.35/f)The question was posed to me during an interview.Query is from Aerodynamics in portion Aerodynamics of Aircraft Design

Which of the following is correct for nacelle form factor (FF)?(a) FF

1.	Which of the following is correct for nacelle form factor (FF)?(a) FF = 1+(0.35/f)(b) FF = 1*(0.35/f)(c) FF = 1-(0.35/f)(d) FF = 1/(0.35/f)The question was posed to me during an interview.Query is from Aerodynamics in portion Aerodynamics of Aircraft Design
Answer» The correct option is (a) FF = 1+(0.35/f) BEST EXPLANATION: Form factor will be different for different components of an AIRCRAFT. For nacelle, form factor can be estimated as follows: Form factor FF = 1 + (0.35/f). Where, f = length/maximum DIAMETER = fineness RATIO.

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Which of the following is correct for nacelle form factor (FF)?(a) FF = 1+(0.35/f)(b) FF = 1*(0.35/f)(c) FF = 1-(0.35/f)(d) FF = 1/(0.35/f)The question was posed to me during an interview.Query is from Aerodynamics in portion Aerodynamics of Aircraft Design

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