externally blown flap

A flap in the wake of the main engines when deflected. Such flaps are more effective, especially in the generation of lift. See blown flap.

References in periodicals archive ?

This wide speed range implied the use of jet lift for stol, as explored with the Boeing YC-14 (using upper surface blowing) and McDonnell Douglas YC-15 (with externally blown flaps) in the US Air Force's Advanced Medium Stol Transport (Amst) programme of the mid-1970s.

Always faster, sometimes safer: multi-national operations, whether of disaster relief or peacekeeping nature, in distant underdeveloped regions are driving demands for strategic airlifters and tankers, and for fixed-, rotary- and tilt-wing intra-theatre transports. Sea and land aspects of mobility are reviewed in following sections of this report