Pratt & Whitney T34

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

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.

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

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 YC-97J Stratofreighter, which later became the Aero Spacelines Super Guppy. The next application for the engine was the Douglas C-133 Cargomaster.

Variants

 * YT34-P-5
 * 5,229 hp (3,900 kW; 5,200 shp)


 * YT34-P-12A
 * 5,500 hp (4,101.35 kW)


 * T34-P-3
 * 6,000 hp (4469 kW)


 * T34-P-6
 * 5,531 hp (4,120 kW; 5,500 shp)


 * T34-P-7W
 * 7,100 hp (5288 kW) w/water injection


 * T34-P-9W
 * 7,500 hp (5586 kW) w/water injection


 * PT2F-1
 * 5,500 hp (4,101.35 kW); Unbuilt civilian version planned to power the Lockheed L-1249B.


 * PT2G-3
 * 5,600 hp (4,200 kW); Unbuilt civilian version planned to power the Lockheed L-1449 and possibly the L-1549.

Applications

 * Aero Spacelines Super Guppy
 * Boeing YC-97J Stratotanker (YT34-P-5)
 * Lockheed R7V-2 Constellation (YT34-P-12A)
 * Lockheed YC-121F Constellation (T34-P-6)
 * Douglas YC-124B Globemaster II
 * Douglas C-133 Cargomaster

Engines on display

 * T34-P-3: National Air and Space Museum (NASM)
 * T34-P-7W: NASM
 * T34-P-7WA: Pacific Coast Air Museum (PCAM)