C-133 Cargomaster

C-133 Cargomaster
Name	Douglas C-133 Cargomaster
Caption	USAF C-133 in flight
Type	Strategic transport aircraft
Manufacturer	Douglas Aircraft Company
First flight	1956
Introduced	1957
Retired	1971
Primary users	United States Air Force
Produced	50

C-133 Cargomaster The Douglas C-133 Cargomaster was a large strategic transport aircraft developed in the 1950s for long-range heavy lift missions, notable for transporting ballistic missiles, heavy equipment, and outsized cargo. It served primarily with the Military Air Transport Service and Military Airlift Command, supporting operations during the Cold War and contributing to strategic readiness through logistics for programs such as the Atlas (rocket), Titan I, and Thor (rocket). The type was designed and built by the Douglas Aircraft Company and operated by units including the 60th Military Airlift Wing and 436th Military Airlift Wing.

Development and Design

Development began as a response to requirements from the United States Air Force for a heavy strategic airlifter capable of carrying large missile components and combat vehicles across transoceanic distances. The design traces to Douglas projects alongside contemporaries like the Lockheed C-141 Starlifter and predecessors such as the Douglas C-124 Globemaster II. The C-133 featured a high-mounted wing, four Pratt & Whitney turboprop engines, and a distinctive cavernous fuselage with a rear cargo ramp that facilitated loading of long items for programs including Minuteman (missile) testing and logistics for the Pacific Air Forces.

Engine integration and structural considerations were influenced by advances in aeronautical engineering from institutions like the National Advisory Committee for Aeronautics and companies such as General Electric and Hamilton Standard. Aerodynamic refinements addressed issues identified during prototypes evaluated at facilities including Edwards Air Force Base and tested under conditions monitored by organizations like the Civil Aeronautics Administration. The production run reflected modifications prompted by feedback from units such as the 6213th Air Transport Wing and included reinforcement of the floor and cargo-handling systems to accommodate vehicles like the M48 Patton tank and components for strategic programs overseen by the Air Force Logistics Command.

Operational History

The C-133 entered service in the late 1950s with squadrons assigned to McChord Air Force Base, Tinker Air Force Base, and Hunter Air Force Base, conducting strategic airlift during heightened tensions exemplified by crises such as the Berlin Crisis of 1961 and routine support for deployments to Vietnam War logistics chains. Missions often connected bases across the Continental Air Command footprint and supported allied operations with partners including NATO members and Pacific allies like Japan and South Korea.

Aircraft were flown by aircrews drawn from units including the 1502d Air Transport Wing and supported by maintenance from depots like the Ogden Air Logistics Complex. Notable operations included ferrying parts for missile sites associated with the Strategic Air Command and carrying outsized payloads for civilian projects coordinated with agencies such as the National Aeronautics and Space Administration and contractors like Convair and Martin Marietta. The type’s range and payload enabled unique missions that linked airfields including Andersen Air Force Base, Ramstein Air Base, and Dover Air Force Base.

Retirement was accelerated by the advent of jet transports like the Lockheed C-5 Galaxy and the Lockheed C-141 Starlifter, combined with structural fatigue issues discovered during service inspections performed by Air Mobility Command predecessors. The last operational flights occurred in the early 1970s, and remaining airframes were relegated to storage at depots such as Davis–Monthan Air Force Base.

Variants

Douglas issued a principal production variant and proposed modifications to meet evolving requirements. The main production model served with the United States Air Force and is often referenced in unit histories of wings like the 63d Military Airlift Wing and 60th Military Airlift Wing. Proposed variants addressing increased range, alternate powerplants, or civil freighter conversion attracted interest from manufacturers including Lockheed and Boeing but did not proceed to mass production. Experimental adaptations and field-modified airframes were evaluated by organizations like the Air Force Flight Test Center.

Technical Specifications

General characteristics included a high-mounted wing, four Pratt & Whitney T34 turboprop engines, tricycle landing gear, and a capacious fuselage enabling carriage of outsized cargo such as missile stages from programs like Atlas (rocket), Titan I, and Thor (rocket). The fuselage cross-section and rear loading ramp allowed vehicles including the M48 Patton and heavy generators used by United States Army units to be loaded and offloaded at bases like Andersen Air Force Base and Dover Air Force Base. Performance metrics were shaped by contemporaneous designs like the Douglas C-124 Globemaster II and influenced procurement decisions by commands including the Military Air Transport Service.

Specifications (typical) - Crew: flight crew drawn from units such as the 436th Military Airlift Wing - Powerplant: four Pratt & Whitney turboprops (T34 series) - Role: strategic airlift for missile components, vehicles, and outsized cargo - Operators: United States Air Force, units at McChord Air Force Base, Tinker Air Force Base, Hunter Air Force Base

Accidents and Incidents

Service history included several high-profile accidents investigated by agencies like the Civil Aeronautics Board and reported in military records of the United States Air Force. Incidents occurred during operations from bases such as Dover Air Force Base, Andersen Air Force Base, and during transoceanic ferry flights to destinations including Hickam Air Force Base and Cam Ranh Bay Air Base. Investigations often examined structural fatigue, maintenance practices at depots like the Ogden Air Logistics Complex, and operational factors encountered by crews from wings including the 63d Military Airlift Wing.

Category: Category:Douglas aircraft Category: Category:United States military transport aircraft