circle-5 said:Bell factory model of D-2064 Tri-Service VTOL transport.
boxkite said:Checking John Paul Campbell's book "Vertical Takeoff and Landing Aircraft" (MacMillan, New York, 1962) again, I believe there were the following Tri-Service competitors:
LTV-Hiller-Ryan (the later winner = XC-142)
Bell (Helicopter Company) D252
Bell (Aerosystems Company with Lockheed) D2064
Grumman (type number unknown)
North American (type number unknown - the topic of this thread)
Boeing Vertol BV (137?)
hesham said:And may be it was Douglas Model-828/A;
hesham said:Hi,
for the military tri-service transport competition of 1961,Bell joined
with Lockheed and submitted a tilt-wing proposal,does anyone know
this competition for USAF ?,which later led to developed the Bell
X-22 for the Navy.
hesham said:A big surprise to all members;
I found the Tri-Service competition and its contenders,they are;
Douglas D-828 & D-829
Silkorsky
North American
Bell/Lockheed D-2064
McDonnell M-175 & M-177
Boeing-Vertol BV.137
Boeing-Wichita Model-900
Vanguard Model-30
Breguet Br.941
LTV XC-142
also we can add Bell D-252,Fairchild M-351 and Grumman G-242.
http://halfdome.arc.nasa.gov/Publications/files/AHSDuganFinal_TiltrotorThrustControl_1029_12408.pdf
Orionblamblam said:I've been trying to convince the author of that paper to share the sources. However, it seems that the sources are a big pallet of reports, and he's understandably less than enthusiastic about shipping off such things to a stranger.
hesham said:A big surprise to all members;
I found the Tri-Service competition and its contenders,they are;
Douglas D-828 & D-829
Silkorsky
North American
Bell/Lockheed D-2064
McDonnell M-175 & M-177
Boeing-Vertol BV.137
Boeing-Wichita Model-900
Vanguard Model-30
Breguet Br.941
LTV XC-142
also we can add Bell D-252,Fairchild M-351 and Grumman G-242.
http://halfdome.arc.nasa.gov/Publications/files/AHSDuganFinal_TiltrotorThrustControl_1029_12408.pdf
The exposed main gear reminds me of the exposed main gear of the long-fuselage MU-2 which can do a gear-up landing with comparatively minor damage to the nose only as the exposed retracted main gear can still support it.circle-5 said:Pictured here is the North American Aviation factory proposal model for the Tri-Service VTOL competition. Note main gear wheels, which stay exposed when retracted. Fenestron-type pitch rotor is also noteworthy.
yasotay said:What a great find! Another superb program falling victim to politics.
The letter further states "Verticraft, however, feels it has a very unique vehicle in that it offers high forward speeds in a true VTOL aircraft, ..." Source NARA
PFM - Pure Functional MagicThe letter further states "Verticraft, however, feels it has a very unique vehicle in that it offers high forward speeds in a true VTOL aircraft, ..." Source NARA
It looks cool, but I'm having difficulty figuring out roll control during hover.
PFM - Pure Functional MagicThe letter further states "Verticraft, however, feels it has a very unique vehicle in that it offers high forward speeds in a true VTOL aircraft, ..." Source NARA
It looks cool, but I'm having difficulty figuring out roll control during hover.
Propriety got the better of me.PFM - Pure Functional MagicThe letter further states "Verticraft, however, feels it has a very unique vehicle in that it offers high forward speeds in a true VTOL aircraft, ..." Source NARA
It looks cool, but I'm having difficulty figuring out roll control during hover.
I would have used a different F.