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T34 Turbo-Wasp
A B-17 Flying Fortress testbed for the T-34 tuboprop engine
Type Turboprop
National origin United States
Manufacturer Pratt & Whitney
First run ca. 1950
Major applications C-133 Cargomaster

The Pratt & Whitney T34 (company designation PT2) was an axial flow[1] turboprop engine designed and built by Pratt & Whitney. Its model name was Turbo-Wasp.[1]


Design and development

In 1945 the United States Navy funded the development of a turboprop engine. The T34 was produced from 1951 to 1960, but never used in a U.S. Navy aircraft production.[2]

The YT34 engine with 3 wide bladed propellers was made for two Navy R7V-2 (C-121s) variants, for testing. Flight tests were 1 September 1954.[3]

In September 1950, a testbed Boeing B-17 Flying Fortress flew with a T34 turboprop mounted in the nose of the bomber. The first application for the T34 was the Boeing YKC-97J, which later became the Model 377 Super Guppy. The next application for the engine was the Douglas C-133 Cargomaster.[2]


  • YT34:
  • T34-P-3: 6,000 hp (4469 kw)
  • T34-P-7W: 7,100 hp (5288 kw) w/water injection
  • T34-P-9W: 7,500 hp (5586 kw) w/water injection


Engines on display

Specifications (T34)


General characteristics

  • Type: Turboprop
  • Length:
  • Diameter:
  • Dry weight:


  • Compressor:


See also

Comparable engines

Related lists


  • Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. pp. 79. ISBN 0-7509-4479-X.  

External links


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