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ACMA/C-XX Advanced Cargo Transport competition

Triton

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Joint Civil/Military Cargo Aircraft: Prospects and Current Perceptions

Author(s):
William T. Mikolowsky - Lockheed-Georgia Co.
William A. Garrett - Lockheed-Georgia Co.

Abstract:
The ACMA (Advanced Civil/Military Aircraft) is conceived as an advanced technology transport aircraft designed from the outset with the potential for fulfilling both the U.S. need for military strategic airlift and the worldwide need for commercial airfreight in the 1990s and beyond. The ACMA, initially called the C-XX, was first described in 1974, and is the subject of a Military Airlift Command Statement of Operational Need (SON) published in 1979. Evidence of the corresponding civil need for a large payload, long range cargo transport has been supplied by the NASA sponsored Cargo Logistics Airlift System Studies (CLASS). The recent preconceptual studies of the ACMA which examine both the technical and institutional issues affecting a joint program indicate that there are no significant obstacles to developing a single, basic configuration, or in administering such a venture. Current Lockheed-Georgia design studies suggest that the ACMA can provide a 30 to 40 percent reduction in direct operating costs and as much as a 50 percent improvement in fuel efficiency compared to contemporary commercial cargo aircraft.

http://papers.sae.org/801052/
 

Stargazer2006

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hesham, please verify your information. This is the Model 754 in the picture, not the 751!!!

So was the C-XX contender the Model 754 (Burnelli-type) or the Model 751 (cooperation with Aeritalia)?
 

hesham

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Stargazer2006 said:
hesham, please verify your information. This is the Model 754 in the picture, not the 751!!!

So was the C-XX contender the Model 754 (Burnelli-type) or the Model 751 (cooperation with Aeritalia)?


Yes you are right,


I will correct it.
 

Graham1973

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I've found a couple of NASA papers on the C-XX program discussing the possibility of building a 'common airframe' for both civil/military uses. The attached cartoon comes from the first paper, the aircraft diagrams come from the second.

The first of the pictured transports appears to be the Douglas "Nation Builder", I've never personally seen anything matching the configuration of the freight/passenger aircraft.

1. Commonality In Future Civil/Military Large Cargo Aircraft: Prospects and Problems (1976)

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19780076239_1978076239.pdf

2. Prospects For A Civil/Military Transport Aircraft (1978)

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19780025117_1978025117.pdf
 

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Graham1973

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I've been looking around on the NTRS trying to find any more information on the Cargo/Passenger aircraft (The one with the overwing engines), but I've not been able to find anything other than the VfW-614 which is a small twinjet with overwing engines (Wikipedia). If anyone can link it back to a particular manufacturer I'd be most interested.
 

Triton

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C-XX or Advanced Civil/Military Aircraft (AC/MA) concept circa 1977. Appears to be McDonnell Douglas "Nation Builder".

Source:
Noor, Ahmed Khairy ed. Structures Technology: Historical Perspective and Evolution. Reston, Virginia: American Institute of Aeronautics and Astronautics, Inc. 1998.
 

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Triton

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Existing topic:

McDonnell Douglas Nation Builder
http://www.secretprojects.co.uk/forum/index.php/topic,6139.msg67769.html#msg67769
 

hesham

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Hi,


here is the Lockheed ACMA concept.


http://arc.aiaa.org/doi/abs/10.2514/3.45548
 

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Antonio

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ACMA: advanced civil/military aircraft

from the source ;)
 

hesham

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Hi,

http://archive.aviationweek.com/image/spread/19810223/26/2
http://archive.aviationweek.com/image/spread/19810223/27/2
 

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LowObservable

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We had better mushrooms back then than you whippersnappers can dream of.
 

Pioneer

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Found this in relation to topic
http://arc-test.aiaa.org/doi/abs/10.2514/6.1983-1592

Sorry if its already been identified and highlighted!

P.S. have we ascertained the actual year that this program was started?

Regards
Pioneer
 

Vahe Demirjian

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The book American Secret Projects 3: US Airlifters since 1962 describes a number of Boeing design studies for the C-XX competition. The first proposal was a 747-based airlifter with a wingspan of 223 feet and a length 265.3 feet as well as a maximum takeoff weight of 980,000 pounds (444,520 kg) and a payload of 300,000 pound (136,080 kg). Another Boeing C-XX design was for an airlifter with three General Electric CF6 turbojets (two under the wings and one inside the vertical stabilizer), a T-tail configuration, a length of 283 feet, a wingspan of 262 feet, a height of 65 feet, and a takeoff weight of 600,000 lb (272,160 kg); a Boeing desktop model of a twin-engine airlifter suggests that Boeing also looked into a twin-engine airlifter design based on the 767 airliner. Drawings and desktop models of the Boeing C-XX designs are published in ASP3 on pages 226 to 228.
 
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