Question

The inverted V-tail is used to ______

(a) to reduce adverse yaw-roll

(b) to provide adverse yaw-roll

(c) to increase lift

(d) to increase thrust

This question was posed to me in a job interview.

My question is based upon Tail Geometry and Arrangement in portion Airfoil and Geometry Selection of Aircraft Design

Answer 1

Right answer is (a) to reduce adverse yaw-roll

Easy explanation: Inverted V tail arrangement is used to prevent the adverse yaw roll motion. Lift can be increased by flaps. Thrust is increased by an engine.