The Pratt & Whitney Canada PW300 series is a family of turbofan engines developed by Pratt & Whitney Canada specifically for business jet applications.

The basic configuration of the PW300 is as follows: single stage fan, driven by a three-stage low pressure turbine, supercharging a four-stage axial/single stage centrifugal high pressure compressor, driven by a two stage high pressure turbine. An annular combustor is featured. Some versions have an unmixed exhaust, but the PW306 and PW308 include a forced mixer. A Full Authority Digital Engine Control (FADEC) system is incorporated.

The PW307A is a new centre-line engine developed specifically for a tri-jet application on the Dassault Falcon 7X. The PW307 was certified by Transport Canada in March 2005.

The PW308A has been chosen to power the Scaled Composites White Knight Two, the launch aircraft for Virgin Galactic’s SpaceShipTwo.

Variants:
PW305A
20.81kN variant used on the Bombardier Learjet 60

PW305B
23.41kN variant used on the Hawker 1000

PW306A
25.36kN variant used on the IAI Galaxy & Gulfstream G200

PW306BL
variant used on the Dornier 328JET

PW306C
25.67kN variant used on the Cessna Citation Sovereign

PW307A
28.49kN variant used on the Dassault Falcon 7X

PW307B
variant used on the Bombardier Learjet 85

PW308A
30.69kN (6900 lb) variant used on the Hawker 4000 & Scaled Composites White Knight Two

PW308C
31.14kN variant used on the Dassault Falcon 2000EX/DX/LX

Applications:
Cessna Citation Sovereign
Dassault Falcon 2000EX/DX/LX
Dassault Falcon 7X
Fairchild Dornier 328JET
Fairchild Dornier 428JET
Gulfstream G200
Hawker 1000
Hawker 4000
Learjet 60
Learjet 85
Scaled Composites White Knight Two

The Pratt & Whitney Canada PW100 aero engine family is a series of 2,000 to 5,000 horsepower (1,500 to 3,700 kW) turboprops manufactured by Pratt and Whitney’s Canadian subsidiary. The engine first entered service in 1984.

Originally called the PT7, the PW100 uses a relatively unusual three-shaft engine configuration. In the PW100, a centrifugal LP impeller (except for the PW150 which uses a 3-stage axial LP compressor), driven by a single stage LP turbine, supercharges a centrifugal HP impeller, driven by a single stage HP turbine. Power is delivered to the offset propeller reduction gearbox via a third shaft, connected to a 2-stage free (power) turbine.

Variants:
PW115

PW118
Certified in 1986 with a maximum continuous rating of 1892eshp (1411kW), can be converted to a PW118A.

PW118A
Certified in 1987 with a maximum continuous rating of 1893eshp (1412kW), can be converted to a PW118B.

PW118B
Certified in 1996 with a maximum continuous rating of 1892eshp (1412kW).

PW119

PW119A
Certified in 1992 with a maximum continuous rating of 1948eshp (1453kW), can be converted to a PW119B.

PW119B
Certified in 1993 with a maximum continuous rating of 1941eshp (1448kW), can be converted to a PW119C.

PW119C
Certified in 1995 with a maximum continuous rating of 1941eshp (1448kW), can be converted to a PW119B.

PW120
Certified in 1983 with a maximum continuous rating of 1787eshp (1333kW), can be converted to a PW121.

PW120A
Certified in 1984 with a maximum continuous rating of 1892eshp (1411kW), can be converted to a PW121.

PW121
Certified in 1987 with a maximum continuous rating of 2044eshp (1524kW), can be converted to a PW120.

PW121A
Certified in 1995 with a maximum continuous rating of 1992eshp (1465kW).

PW123
Certified in 1987 with a maximum continuous rating of 2261eshp (1687kW), can be converted to a PW123B, C, D or E.

PW123AF
Certified in 1989 with a maximum continuous rating of 2261eshp (1686kW), can be converted to PW123.

PW123B
Certified in 1991 with a maximum continuous rating of 2262eshp (1687kW), can be converted to a PW123.

PW123C
Certified in 1994 with a maximum continuous rating of 2054eshp (1532kW), can be converted to a PW123 or D.

PW123D
Certified in 1994 with a maximum continuous rating of 2054eshp (1532kW), can be converted to a PW123 or C.

PW123E
Certified in 1995 with a maximum continuous rating of 2261eshp (1687kW), can be converted to a PW123.

PW124

PW124A

PW124B
Certified in 1988 with a maximum continuous rating of 2522eshp (1881kW), can be converted to a PW123 or PW127.

PW125

PW125A

PW125B
Certified in 1987 with a maximum continuous rating of 2261eshp (1687kW).

PW126
Certified in 1987 with a maximum continuous rating of 2323eshp (1732kW) can be converted to a PW123 or PW126A.

PW126A
Certified in 1989 with a maximum continuous rating of 2493eshp (1859kW), can be converted to a PW123 or PW127D.

PW127
Certified in 1992 with a maximum continuous rating of 2619eshp (1953kW), can be converted to a PW127C,E or F.

PW127A
Certified in 1992 with a maximum continuous rating of 2620eshp (1954kW), can be converted to a PW127B.

PW127B
Certified in 1992 with a maximum continuous rating of 2619eshp (1953kW).

PW127C
Certified in 1992 with a maximum continuous rating of 2880eshp (2148kW).

PW127D
Certified in 1993 with a maximum continuous rating of 2880eshp (2148kW), can be converted to a PW127B.

PW127E
Certified in 1994 with a maximum continuous rating of 2516eshp (1876kW), can be converted to a PW127M.

PW127F
Certified in 1996 with a maximum continuous rating of 2619eshp (1953kW), can be converted to a PW127M.

PW127G
Certified in 1997 with a maximum continuous rating of 3058eshp (2281kW).

PW127H
Certified in 1998 with a maximum continuous rating of 2880eshp (2148kW).

PW127J
Certified in 1999 with a maximum continuous rating of 2880eshp (2148kW).

PW127M
Certified in 2007 with a maximum continuous rating of 2619eshp (1953kW).

PW150A
Certified in 1998-06-24 with a maximum continuous rating of 5071 SHP (3782kW), although capable of up to 7000 SHP. Has a 3 stage axial low pressure compressor instead of the centrifugal NL unit on other variants. Used on the Bombardier Q400.

ST18M
marine application for PW100

ST40M
marine application for PW150A

Applications
ATR 42 (PW120 on -200, PW127E on -500, PW127M on -600)
ATR 72 (PW124B on -100 -200, PW127F or M on -500, PW127M on -600)
BAe ATP (PW126)
Bombardier 415 (PW123AF)
Bombardier CL-215T (PW123AF)
Bombardier Q100 (PW121)
Bombardier Q200/Q300 (PW123)
Bombardier Q400 (PW150)
Canadair CL-415 (PW123AF)
Dornier 328 (PW119)
EADS CASA C-295 (PW127G)
Embraer EMB 120 Brasilia (PW115, latterly PW118A)
Euromil Mi-38 (PW127TS)
Fokker 50 (PW125B)
Fokker 60 (PW127B)
Ilyushin Il-114 (PW127H)
Xian MA60 (PW127J)

Specifications:
Type: Turboprop
Length:
Diameter:
Dry weight: 929 pounds Weight with accessories and fluid 1064 pounds
Compressor: LP and HP independent centrifugal compressors. PW150 LP compressor is three-stage axial.
Combustors: Annular reverse flow combustion chamber
Turbine: Axial flow: single-stage HP; single-stage LP; the power turbine has two stages on all PW100 variants, and three stages on the PW150.
Fuel type: JET A
Oil system: Self-contained system
Maximum power output:
PW120 – takeoff 1800shp – Rto 2000shp
PW121 – takeoff 1900shp – Rto 2100shp
PW124 – takeoff 2160shp – Rto 2400shp
PW127 – takeoff 2475shp – Rto 2750shp
Turbine inlet temperature: max ITT for Reserve takeoff power, 816c Start 950c 5 seconds