Pratt & Whitney TF33
From Scramble - The Aviation Magazine
The TF33 Pratt & Whitney's JT3D turbofan engine. It was derived from the J57 turbojet, increasing air mass flow almost 2.5 times. The first two compressor stages of the canceled J91/JT9 replaced the first three compressor stages of the J57, making it simple to modify existing turbojets with a kit. The conversion increased thrust by 35 percent and fuel consumption by 15-22 percent. The TF33 first flew in 1958 and was in production until 1985. About 8,600 were produced.
- Data for TF33-P-100A
- Compressor Stages: @
- Combustion Chamber: @
- Turbine Stages: @
- Max Diameter: 1.373 m (54.06 inch)
- Length: 3.607 m (142 inch)
- Dry Weight: 2,173 kg (4,790 lb)
- Pressure ratio: @ : 1
- Mass flow: 450 lb/sec
- Bypass ratio: 1.4
- Thrust to weight ratio 7-8 : 1
- Specific fuel consumption: 15.86 mg/Ns (0.56 lb/h/lb st)
Fitted to the B-52H. Rated at 75.6 kN (17,000 lb) thrust.
Fitted to the C-135B and derived variants. Rated at 80.1 kN (18,000 lb).
Fitted to the C-135C and derived variants, including the EC-135C Looking Glass.
Fitted to Martin WB-57F as TF33-P-11A. Rated at 71.2 kN (16,000 lb).
Company designation JT3D-8B, modified with additional accessory drives to cope with higher electric energy generation demands. Selected for the Boeing E-3 Sentry and TC-18E as TF33-P-100A. Rated at 93.4 kN (21,000 lb).
Designation for ex-civil JT3D engines (taken from surpluss civil airframes) to re-engine some KC-135As. Over 150 aircraft were modified and the former KC-135A were re-designated KC-135E. The TF33-P-102C is powering the Northrop Grumman (Boeing) E-8 J-Stars. Rated at 80.1 kN (18,010 lb).
Alternative designation for the TF33-P-3. Rated at 75.6 kN (16,995 lb).
- Boeing (K)C-135 Stratolifter/Stratotanker
- Boeing E-3 Sentry
- Boeing B-52H Stratofortress
- General Dynamics RB-57F Canberra
- Lockheed C-141 Starlifter
- Northrop Grumman (Boeing) E-8 J-Stars
- Jane's All the World's Aircraft, ISBN 0 7106-0821-7