Question

Which of the following is correct?

(a) Generally, tip airfoils are selected for stall characteristics

(b) Always root airfoils are elected for stall characteristics

(c) Wing twist will increase thrust by engine

(d) Wing twist is not considered for layout

This question was addressed to me in an interview for job.

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

Answer 1

Right answer is (a) Generally, tip airfoils are selected for stall characteristics

To explain: Generally, tip airfoils are selected for gentle stall properties. Root airfoils are selected for best performance. By doing so we will have better wing which has overall good performance and stall properties.