Question

RCS of flat surface can be reduced by _____

(a) providing some slope to flat surface

(b) increasing flat side length

(c) using twice length of the flat side

(d) provide more rcs to flat side

I got this question in a national level competition.

Asked question is from Configuration Layout Considerations topic in section Configuration Layout Considerations of Aircraft Design

Answer 1

Correct answer is (a) providing some slope to flat surface

For explanation I would say: Flat surfaces offer highest rcs possible. Now, to reduce it we can provide some slope to flat side of the surface. This will reduce the amount of EMW being returned by the flat side. If we increase the flat side length then, it will not reduce rcs of the flat surface.