Question

As a designer, our job is to design a wing which has root chord Cr as 1m. What should be the approximate radius of fillet?

(a) 0.1m

(b) 1m

(c) 2m

(d) 2.1m

The question was posed to me in final exam.

My question is from Configuration Layout in section Configuration Layout and Loft of Aircraft Design

Answer 1

The correct option is (a) 0.1m

Explanation: typically fillet radius can be approximated as 10% of the root chord.

Hence, radius = 10% of Cr = 10% of 1 = 0.1*1 = 0.1m.