Pratt & Whitney Canada PW100

The Pratt & Whitney Canada PW100 aircraft engine family is a series of Template:Convert turboprops manufactured by Pratt & Whitney Canada. Pratt & Whitney Canada dominates the turboprop market with 89% of the turboprop regional airliner installed base in 2016, leading GE Aviation and Allison Engine Company.<ref>Template:Cite news</ref>

Development

The engine was first introduced as a technology demonstrator in 1977.<ref name="FI20120228">Template:Cite magazine</ref> The PW100 was first tested in March 1981, made its initial flight in February 1982 on a Vickers Viscount testbed aircraft,Template:Sfn and then entered service in December 1984 on a Dash 8 regional aircraft for NorOntair.<ref name="PWC30thAnniv">Template:Cite press release</ref>

The PW150 engine was introduced on 24 April 1995, when Bombardier selected the engine for the launch of its de Havilland Dash 8-400 regional turboprop. The PW150 was a higher-power version of the PW100 series, with the low-pressure compressor changed from a single-stage centrifugal compressor to a three-stage axial compressor, and the turbine modified to have improved cooling. The power rating was increased from Template:Convert in the PW127 to Template:Cvt in the PW150, although the engine was thermodynamically capable of Template:Cvt.<ref name="FI19950502">Template:Cite magazine</ref>

At the 2021 Dubai Air Show, Pratt & Whitney Canada introduced the PW127XT (extended-time-on-wing) series. The PW127XT, which is intended to replace the PW127M variant, reduces the number of engine overhauls within 10 years to two from three. The engine maintenance interval (time-on-wing) is increased from 14,000 hours to 20,000 hours and would use three percent less fuel than the PW127M.<ref name="AIN20211116">Template:Cite magazine

• {{#invoke:citation/CS1|citation

|CitationClass=web }}</ref> The engine series will premiere as the standard powerplant on all new ATR 42 and ATR 72 aircraft, with a launch order from Air Corsica using the PW127XT-M engine model. The PW127XT-N variant, which is designed for the ATR 72-600, has the same mechanical power rating as the PW127XT-M but has a higher thermodynamic power rating.<ref name="FI20211115">Template:Cite magazine</ref>

Design

Originally called the PT7, the PW100 uses a relatively unusual three-shaft engine configuration. In the PW100, a centrifugal low-pressure (LP) impeller (except for the PW150, which uses a 3-stage axial LP compressor), driven by a single-stage LP turbine, supercharges a contra-rotating centrifugal high-pressure (HP) impeller, driven by a single-stage HP turbine. Power is delivered to the offset propeller reduction gearbox through a third shaft, connected to a two-stage free (power) turbine. The gearbox has two stages, yielding a reduction ratio between 15.4 and 17.16. The first stage uses double helical gears, followed by a second stage with straight spur gears.<ref name="PW100-20years"/>

File:Pratt & Whitney Canada PW123 retouched.jpg

Pratt & Whitney Canada PW123, from right to left: propeller mount, gearbox, air intake below, accessories surrounding the compressor, combustor, turbine and exhaust

Variants

File:HOP ATR42 F-GPYC 25sep14 LFBO-2.jpg

A PW127E installed on an ATR 72-500

File:RAFO EADS CASA C-295 901 PAS 2013 04 PW127G turboprop engine.jpg

PW127G engine on a CASA C-295 aircraft at Paris Air Show 2013

The last two digits of each variant model number represent the nominal power at takeoff, in hundreds of horsepower.<ref name="Cook198504">Template:Cite conference</ref>

Certified variants<ref name="cantcds">Template:Cite report Canadian type certificate for PW118–PW127.</ref>

Variant	Certification	Rating	Notes
PW115	1983-12<ref name="Cook198504"/>	Template:Cvt<ref name="jet-engine">{{#invoke:citation/CS1|citation	CitationClass=web }}</ref> || No longer in service.
PW118	1986-03-11	1,892 eshp (1,411 kW)	Can be converted to a PW118A.
PW118A	1987-06-30	1,893 eshp (1,412 kW)	Can be converted to a PW118B.
PW118B	1996-02-29	1,892 eshp (1,412 kW)
PW119A	1992-03-04	1,948 eshp (1,453 kW)	Can be converted to a PW119B.
PW119B	1993-04-05	1,941 eshp (1,448 kW)	Can be converted to a PW119C.
PW119C	1995-04-21	1,941 eshp (1,448 kW)	Can be converted to a PW119B.
PW120	1983-12-16	1,787 eshp (1,333 kW)	Can be converted to a PW121.
PW120A	1984-09-18	1,892 eshp (1,411 kW)	Can be converted to a PW121.
PW121	1987-02-18	2,044 eshp (1,524 kW)	Can be converted to a PW120.
PW121A	1995-03-24	1,992 eshp (1,465 kW)
PW123	1987-06-30	2,261 eshp (1,687 kW)	Can be converted to a PW123B, C, D, or E.
PW123AF	1989-06-14	2,261 eshp (1,686 kW)	Can be converted to PW123.
PW123B	1991-12-20	2,262 eshp (1,687 kW)	Can be converted to a PW123.
PW123C	1994-05-13	2,054 eshp (1,532 kW)	Can be converted to a PW123 or D.
PW123D	1994-05-13	2,054 eshp (1,532 kW)	Can be converted to a PW123 or C.
PW123E	1995-02-13	2,261 eshp (1,687 kW)	Can be converted to a PW123.
PW124B	1988-05-25	2,522 eshp (1,881 kW)	Can be converted to a PW123 or PW127.
PW125B	1987-05-01	2,261 eshp (1,687 kW)
PW126	1987-05-01	2,323 eshp (1,732 kW)	Can be converted to a PW123 or PW126A.
PW126A	1989-06-14	2,493 eshp (1,859 kW)	Can be converted to a PW123 or PW127D.
PW127	1992-02-04	2,619 eshp (1,953 kW)	Can be converted to a PW127C, E, or F.
PW127A	1992-02-10	2,620 eshp (1,954 kW)	Can be converted to a PW127B.
PW127B	1992-11-05	2,619 eshp (1,953 kW)
PW127C	1992-10-06	2,880 eshp (2,148 kW)
PW127D	1993-03-31	2,880 eshp (2,148 kW)	Can be converted to a PW127B.
PW127E	1994-12-16	2,516 eshp (1,876 kW)	Can be converted to a PW127M.
PW127F	1996-08-30	2,619 eshp (1,953 kW)	Can be converted to a PW127M.
PW127G	1997-09-19	3,058 eshp (2,281 kW)	Used in CASA C295.
PW127H	1998-10-23	2,880 eshp (2,148 kW)
PW127J	1999-01-04	2,880 eshp (2,148 kW)
PW127M	2007-12-07	2,619 eshp (1,953 kW)	Used in the ATR 72-600s.
PW127N	2014-05-05	2,619 eshp (1,953 kW)
Template:Nowrap	2023-08-28	2,619 eshp (1,953 kW)	Developed for use on STOL (short takeoff and landing) aircraft
Template:Nowrap	2022-08-25	2,621 eshp (1,954 kW)	Used in the ATR 72-600s.
Template:Nowrap	2023-06-22	2,621 eshp (1,954 kW)
PW150A	1998-06-24	5,492 eshp (4,095 kW)<ref name="cantcds-pw150">Template:Cite report Canadian type certificate for PW150.</ref>	For the Q400 and An-132.Template:Efn

Other variants

PW119

Template:Cvt,<ref name="Flying199109">Template:Cite magazine</ref> no longer in service.

PW124

Template:Cvt,Template:Sfn no longer in service.

PW124A

No longer in service.

PW125

No longer in service.

PW125A

No longer in service.

PW127TS

Template:Cvt turboshaft version that powered the first 2 prototypes of the Mil Mi-38 helicopter<ref name="AIN201402">Template:Cite magazine

• {{#invoke:citation/CS1|citation

|CitationClass=web }}</ref> and was to be used on the Mi-38-1 variant.<ref name="Take-Off201411">Template:Cite magazine

• {{#invoke:citation/CS1|citation

|CitationClass=web }}</ref>

PW127XT-S

Selected to power the Deutsche Aircraft D328eco in June 2022.<ref name="AirInsight20220617">Template:Cite news</ref>

PW130

Unsuccessfully offered for the Saab 2000<ref name="AW19890703">Template:Cite magazine</ref> and IPTN N-250 aircraft.<ref name="AW19900730">Template:Cite magazine</ref> Proposed for the unbuilt Fokker 50-400 aircraft.<ref name="Aeropers199007">Template:Cite magazine</ref>

PW150 Twin Pack

Proposed powerplant for the Airbus A400M.<ref name="FI19990317">Template:Cite magazine</ref> Two PW150-based engines would be used to drive a single propeller.<ref name="FI19990602">Template:Cite magazine</ref> The powerplant was eliminated from contention by Airbus in early June 1999, since it was short of providing the Template:Cvt required to drive the eight-bladed propeller at the time, and its specific fuel consumption (SFC) was excessive.<ref name="JDW19990609">Template:Cite magazine</ref>

PW150B

Proposed powerplant for the Shaanxi Y-8F-600.<ref name="UPI20081203">Template:Cite news</ref> Abandoned in December 2008 when the United States government barred a U.S.-based subcontractor from exporting the engine control software for the PW150B.<ref name="ACN20081222">Template:Cite news</ref>

PW150C

Proposed powerplant for the Xian MA700.<ref name="AIN20200120">Template:Cite news</ref> Includes a third-stage power turbine, larger-diameter propellers, modified reduction gearbox, and optimized low-pressure compressor.<ref name="AIN20170620">Template:Cite news</ref> Has higher thrust, higher speed, and extended range compared to the PW150A. Blocked from an export license by the Canadian government in 2020,<ref name="cha20210928">Template:Cite news</ref> because of the Chinese government's retaliatory detention of Canadian citizens (the "two Michaels") starting in 2018.<ref name="FI20221003">Template:Cite news</ref>

ST18M

Marine application for the PW100.

ST40

PW150 derivative adapted for the Bombardier JetTrain, which was proposed for use in high-speed train travel in North America.<ref name="HC20021016">Template:Cite news</ref>

ST40M

Marine application for the PW150A.

Applications

Aircraft

File:Pw120a-142803.jpg

A PW120A fitted to a Canadian Forces CT-142

Application	Variant
Antonov An-132D	PW150A
Antonov An-140	PW127A
ATR 42-300/320/400	PW120/PW121
ATR 42-500/600/600Template:Abbr	PW127E/XT-M/XT-L
ATR 72-100/200	PW124B
ATR 72-500/600	PW127F/XT-M
BAe ATP	PW126
Canadair CL-215T	PW123AF
Canadair CL-415	PW123AF
De Havilland Canada Dash 8-100	PW120/PW121
De Havilland Canada Dash 8-200/300	PW123
De Havilland Canada Dash 8-400	PW150
Dornier 328	PW119
EADS CASA C-295	PW127G
Embraer EMB 120 Brasilia	PW118/118A/118B
Fokker 50/60	PW125B/127B
Ilyushin Il-114	PW127H
Xian MA60	PW127J
Xian Y-7-200A	PW127C<ref name="flightglobal_21461">Template:Cite magazine</ref>

Other applications

• Bombardier JetTrain
• Skjold-class corvette

Specifications

citation

CitationClass=web }}</ref>	Series	Thermo. Power	Mech. Power	Prop. max. RPM	BSFCTemplate:Efn<ref name="Gudmundsson2022"/>	Dry weight<ref name="Gudmundsson2022">Template:Cite book</ref>	Height	Width	Length	Application
PW118	Template:Cvt	Template:Cvt	1,300	Template:Cvt	Template:Cvt	Template:Cvt	Template:Cvt	Template:Cvt	Embraer EMB-120
PW120	Template:Cvt	Template:Cvt	1,200	Template:Cvt	Template:Cvt	Template:Cvt	Template:Cvt	Template:Cvt	ATR 42-300/320 Dash 8-100
PW123/124	Template:Cvt	Template:Cvt	1,200	Template:Cvt	Template:Cvt	Template:Cvt	Template:Cvt	Template:Cvt	Dash 8-200/300 Canadair CL-215T/CL-415
PW127	Template:Cvt	Template:Cvt	1,200	Template:Cvt	Template:Cvt	Template:Cvt	Template:Cvt	Template:Cvt	An-140, ATR 42-400/500/600, ATR 72-210/500/600 CASA C-295, Il-114-100, Xian MA60
PW150	Template:Cvt	Template:Cvt	1,020	Template:Cvt<ref name="NonfighterEngines2007"/>	Template:Cvt<ref name="NonfighterEngines2007">Template:Cite book</ref>	Template:Cvt	Template:Cvt	Template:Cvt	Dash 8-400

Bibliography

• {{#invoke:citation/CS1|citation

|CitationClass=web }}

• Template:Cite book

External links

• Template:Official website