Question

What is thrust drag accounting?

(a) Allocation of flow forces to the airframe drag

(b) Allocation of flow forces to the wave drag

(c) Allocation of flow forces to the induced drag

(d) Allocation of flow forces to the parasitic drag

The question was asked in an interview.

I need to ask this question from Thrust Producing Power Plant topic in section Aircraft Force Systems and the Equations of Motion of Aircraft Performance

Answer 1

Right option is (a) Allocation of flow forces to the airframe drag

Easy explanation: The allocation of flow forces to the airframe drag or to the propulsive thrust is known as the thrust drag. It is important to distinguish these force contributions else there results a wrong estimation of the aircraft performance.