The need for military aircraft that will operate from short unimproved airfields, and the decks of smaller aircraft carriers has increased in recent years due to a changing world situation and the shrinking of the dollar. Such aircraft need to be fuel efficient, quiet, maneuverable, have low infrared signature, and carry a large useful load. The Ball-Bartoe 'Jetwing' is a single engine upper surface blowing concept which offers the possibility of achieving these objectives. The 'Jetwing' concept achieves supercirculation lift and STOL performance by ducting all engine air through the leading edge of the wing and ejecting it over the top surface of the wing through a slot nozzle. This nozzle extends along approximately 70% of the wing span. A Coanda flap is mounted at the trailing edge of the blown portion of the wing. In addition to the main wing, a smaller wing panel is mounted above the slot nozzle. The air passage between the main wing and the smaller upper wing acts as an ejector to reduce installed thrust losses. For high speed applications that concept may be used without this upper wing. A thrust reversing method is also incorporated into the concept. The thrust is reversed by rotating the top of the slot nozzle so as to close the nozzle and open a reverse flow path. This report covers the flight test program of the Jetwing research airplane.
A Flight Test Evaluation of the Ball-Bartoe Jetwing Propulsive Lift Concept
1981
189 pages
Report
Keine Angabe
Englisch
Aircraft , Jet aircraft , Short takeoff aircraft , Powered lift , Wings , Military aircraft , Research aircraft , Aircraft engine ducts , Slots , Exhaust nozzles , Thrust augmentor nozzles , Coanda effect , Flaps(Control surfaces) , Thrust reversal , Leading edges , Aerodynamic stability , Flight testing , Ball Bartoe Jetwing engines , USB(Upper Surface Blowing) , Jetwing aircraft , Slot nozzles