As a designer our task is to generate fuselage through conic lofting method. If an intermediate C/S shape is elliptic then, what should be the appropriate value of conic shape parameter?(a) 0.4142-0.5(b) 0.7(c) 0.8369(d) 1.2-1.5I had been asked this question during an interview.My question is taken from Configuration Layout in portion Configuration Layout and Loft of Aircraft Design

As a designer our task is to generate fuselage through conic lofting m

1.	As a designer our task is to generate fuselage through conic lofting method. If an intermediate C/S shape is elliptic then, what should be the appropriate value of conic shape parameter?(a) 0.4142-0.5(b) 0.7(c) 0.8369(d) 1.2-1.5I had been asked this question during an interview.My question is taken from Configuration Layout in portion Configuration Layout and Loft of Aircraft Design
Answer» The correct ANSWER is (a) 0.4142-0.5 Best explanation: Given, intermediate cross section = elliptic. Conic shape parameter CSP = DS / DC, where D = midpoint of line drawn from end point A to end point B, C = tangent point, S = SHOULDER point. When CSP = 0.4142 and AC = BC then it will generate circular shape. Now, when CSP = 0.5 it will produce parabola. Hence, to generate elliptic cross section value of CSP should be between 0.4142 and 0.5 BASED on our REQUIREMENT.

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