Pratt & Whitney JT12

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JT12/J60
Pratt & Whitney Jt-12A Turbojet Engine.jpg
A Pratt & Whitney JT12A turbojet
Type Turbojet
Manufacturer Pratt & Whitney
First run 1957
Major applications North American Sabreliner
T-2 Buckeye
Number built 2621[1]
Variants Pratt & Whitney T73

The Pratt & Whitney JT12, (US military designation J60) is a small turbojet engine. The Pratt & Whitney T73 (Pratt & Whitney JFTD12) is a related turboshaft engine.[2]

Design and development[edit]

The J60 conception and project design began in July 1957 at United Aircraft of Canada (now Pratt & Whitney Canada) in Montreal. The project design details were transferred to the main P&W company in East Hartford and in May 1958, the first prototype, with military designation YJ60-P-1 commenced testing.

Flight tests were completed in early 1959; followed by the delivery of the new JT12A-5 engines in July 1959. These were for the two Canadair CL-41 prototype trainers with a rating of 12.9 kN (2,900 lb st). The modified JT12A-3 turbojets with a basic rating of 14.69 kN (3,300 lb st) were tested in the two Lockheed XV-4A Hummingbird VTOL research aircraft. The next version, JT12A-21, had an afterburner which delivered a maximum thrust of 17.91 kN (4,025 lb st).

Variants[edit]

Data from Janes[3]
YJ60-P-1—prototype
J60-P-3
J60-P-4
J60-P-5
J60-P-6
T73
Military designation of the Pratt & Whitney JFTD12 free power turbine turboshaft version of the J60.
JT12A-3LH
JT12A-5
(J60-P-3/-5/-6) Take-off ratings from 2,900 lbf (12.9 kN) to 3,001 lbf (13.35 kN).
JT12A-6
Essentially similar to the -5
JT12A-7
(J60-P-4) up-rated to 3,300 lbf (15 kN)
JT12A-8
JT12A-21
An after-burning version developing 4,024 lbf (17.9 kN) thrust wet.
FT12
Turboshaft versions for marine use.
JFTD12
Company designation of the Pratt & Whitney T73 free power turbine turbo-shaft version of the J60.

Applications[edit]

Civilian (JT12)[edit]

Military (J60)[edit]

Specifications[edit]

General characteristics

  • Type: Turbojet
  • Length: 1930 mm
  • Diameter: 556 mm
  • Dry weight: 212 kg

Components

  • Compressor: 9 stage axial
  • Turbine: 2 stages

Performance

See also[edit]

Related development
Comparable engines
Related lists

References[edit]

External links[edit]