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Douglas C-133A Cargomaster Main Gear and APUs

Douglas C-133A Cargomaster Main Gear and APUs

C-133A port side view showing the main landing gear design and APUs.
The C-133A "Cargomaster" was built by the Douglas Aircraft Company and made it's first flight on 23 April, 1956. Douglas designed the C-133A to meet the USAF's Logistic Carrier Support System requirements for transport of strategic missiles. Production ended in 1961 with Douglas building 35 C-133A's and 15 C-133B models. The main difference between the A and B models was changing the rear ramp/doors of the A model to a clamshell design on the B and increasing the power of the turboprop engines. The B model gained 3 additional feet of usable cargo deck, allowing a fully assembled Titan missile to be loaded, eliminating the need to transport strategic missiles over the nation's highways. The main C-133 design features were the high wing and main gear. To get a cargo deck long enough and without obstructions from the aircraft's structure, the wing box is above the ceiling of the cargo compartment. The main landing gear were of a new design with a blister type fairing on the bottom of the fuselage, allowing the cargo deck to be free of any wheel well protrusions. The structural load from the main landing gear would now be absorbed by the fuselage instead of the wing. This feature would be carried forward to newer airframes like the C-130, C-141, C-5, and C-17.


Engines: Four Pratt & Whitney T34-P-9W's / 7,500 hp each
Crew: Six
Maximum speed: 359 mph
Cruising speed: 323 mph
Range: 4,027 miles
Ceiling: 29,950 ft.
Span: 179 ft. 8 in.
Length: 157 ft. 6 in.
Height: 48 ft. 3 in.
Cargo deck length: 86 ft. 10 in
Cargo deck height: 13 ft. 4 in.
Weight: 286,000 lbs. maximum

Posted in Submitted by keith on Thu, 03/05/2009 - 20:51.