|The power required to maintain velocity against decelerating air resistance is factored into John Boyds Energy Maneuverability Equation. Ps=V(T-D/W)
I've been working on that for over 30 years, and it seems to make more sense now.
Illustrated with a thought experiment in space.
A round object traveling at V (any velocity) of small mass relative to the same round object (same diameter) also traveling at the same velocity with the mass of the comparative object is 1000 times denser, and then how much power is required to keep the mass decelerating at the same rate as both objects enter the same dense atmosphere.
Ps = (T/W - D/W)