CX-HLS (Cargo Experimental, Heavy Logistic Support) designs & derivatives

MISSIONS CONSIDERED FOR MPLE


The missions considered in the July MPLE study were selected after discussions with Headquarters, USAF and several AF Commands. They are the Airborne Alert Weapon System, and the Post Attack Command and Control System, both Strategic Air Command missions; the Airborne Warning and Control System and the Manned Air Defense System, missions of concern to both the Air Defense Command and the Tactical Air Command; and the CX-4 Heavy Logistics Transport System, a mission requirement of the Military Air Transport Service. As a result of the discussions, it has been assumed that the AWAC and MADS systems would not be procured simultaneously; either one or the other would be procured, but not both, and the cost effectiveness studies are based upon this assumption.

Specific operational requirements were determined for each mission from the discussions with military personnel and official documents where possible. The specific requirements of the AAWS, PACCS, AWAC, and MADS missions are classified. Each has as a basic requirement, however, the achievement of unrefuelled airborne endurance beyond that presently available from operational equipment. In addition to long endurance certain of the missions require high altitude and high speed capability as well.

The CX-4 mission requirements are those specified in Draft #3 Specific Operational Requirements for Heavy Logistics Support Aircraft System dated 17 September 1962, as revised in discussions with MATS and Headquarters, USAF. For the basic mission of 4000 nautical miles range, the assumed payload is 135,000 pounds with a structural capability of 165,000 pounds. The cruise altitude must not be less than 30,000 feet and the cruise speed must not be less than 440 knots. At the design gross weight the required take-off distance over a 50-foot obstacle on a 89.5°F day is 8000 feet.

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CX-4

Gross Weight (Lb) 585,000
LFC on Wing & Tail No
Engines 4 X 34,700 lb. Thrust
Turbofans
Wing Area (Sq.Ft.) 4,640
Endurance/speed/alt. (hr/knt/ft) 15.5/400/35,000 at
672,000 lb. G.W.

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Although Boeing lost the competition for the gigantic military transport, the C-5A, Boeing took advantage of the high bypass engine technology developed for the C-5A to develop the new gigantic 747 commercial transport. The design philosophy behind the 747 was to develop a completely new plane, and other than the engines, the designers purposefully avoided using any hardware developed for the C-5.

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A probable one of a kind model Aircraft produced in the Lockheed model shop in the early 1960's. The GL-194 aircraft was one of many submitted to the USAF for the CX-X project, then renamed theCX-HLS, Heavy Logistics System Project. This model comes in its original custom made pine box. The condition of the model is excellent, minus some hairline cracks on the top fuselage where the wings cross the top. The only marking is on the bottom with a piece of tape that says "GL-194-12". The material is light weight, looking in the hole in the bottom for the base it looks to be wood.

This is an extremely rare model and probably the only one in existence. This came from the estate of a Lockheed engineer several years ago.

Wingspan is about 10 1/2", length is about 10".

CX-X and Heavy Logistics System - In 1961, several aircraft companies began studying heavy jet transport designs that would replace the Douglas C-133 Cargomaster and complement Lockheed C-141 Starlifters. In addition to higher overall performance, the United States Army wanted a transport aircraft with a larger cargo bay than the C-141, whose interior was too small to carry a variety of their outsized equipment. These studies led to the "CX-4" design concept, but in 1962 the proposed six-engine design was rejected, because it was not viewed as a significant advance over the C-141.[3] By late 1963, the next conceptual design was named CX-X. It was equipped with four engines, instead of six engines in the earlier CX-4 concept. The CX-X had a gross weight of 550,000 pounds (249,000 kg), a maximum payload of 180,000 lb (81,600 kg) and a speed of Mach 0.75 (500 mph or 805 km/h). The cargo compartment was 17.2 ft (5.24 m) wide by 13.5 feet (4.11 m) high and 100 ft (30.5 m) long with front and rear access doors. To provide required power and range with only four engines required a new engine with dramatically improved fuel efficiency.

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Triton said:

Is this model a CX-X concept or a CX-4 design concept? The seller states it is a CX-X concept while the cut-and-paste from Wikipedia would support that this is a CX-4 design concept with a six-engine configuration rejected in 1962?

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PaulMM (Overscan) said:

Triton said:

Is this model a CX-X concept or a CX-4 design concept? The seller states it is a CX-X concept while the cut-and-paste from Wikipedia would support that this is a CX-4 design concept with a six-engine configuration rejected in 1962?

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Not certain, but it isn't the Lockheed CX-4 recommended configuration (that was T-tail).

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Vintage Boeing Gordon Phillips SST USAF Airplane Poster...Rare 1970's original PROMOTIONAL Poster...Huge size...great condition...some age wear...Rare Gordon Phillips Art Work poster for your collection

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Orionblamblam said:

Boeing, after all, put forward a detailed proposal for the B-1, including building a full scale mockup of at least the forward fuselage; but as soon as Rockwell was selected, the Boeing effort vanished almost entirely.

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