passive driftn.Aeronauticsrare the part of the total head resistance of an aircraft which is not induced by the lift.Apparently only attested in dictionaries or glossaries.
ΚΠ
1918 E. S. FarrowDict. Mil. Terms 437Passive drift, in aëronautics, the drift produced by all the aëroplane except the lifting surfaces—that is the struts, wires, fuselage, under-carriage, etc.