Originally Posted by
orca
Most folk could mount a plausible explanation of Intake Momentum Drag and its effect if you didn’t play by the rules...everyone’s story on the effect was aligned but the explanation always seemed to be a bit woolly!
Intake inertia *drag* is a different thing altogether - that's the angular moment produced by same effect as the "P-factor" people talk about loosely with propellers - the angular reaction experienced when bending the sairflow into the intake. It's one of the reasons why the Sailor-Inhaler X-32's forward intake was such a fundamentally bad idea - intake distance from the CG being one of the main governing factors for the magnitude of IID effects.
PDR