Question

Brequet Range expression value is maximum at __________

(a) 1.316 Vmd

(b) 1.216 Vmd

(c) 1.3 Vmd

(d) 1.2 Vmd

This question was addressed to me at a job interview.

This question is from Cruise Method 1 topic in chapter Cruising Performance of Aircraft Performance

Answer 1

The correct option is (a) 1.316 Vmd

For explanation: Brequet Range expression is given by R1 = \(\frac{V}{C}\frac{L}{D}\) ln ω where V is true airspeed, C is specific fuel consumption, L is lift, D is drag, and ω is fuel ratio. This Brequet Range expression comes in the cruise method 1. Brequet Range expression value is maximum at 1.316 Vmd.