The Pratt & Whitney Canada PT6 is a

turboprop A turboprop is a Gas turbine, gas turbine engine that drives an aircraft Propeller (aeronautics), propeller. A turboprop consists of an intake, reduction drive, reduction gearbox, gas compressor, compressor, combustor, turbine, and a propellin ...

aircraft engine An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Aircraft using power components are referred to as powered flight. Most aircraft engines are either piston engines or gas turbin ...

produced by

Pratt & Whitney Canada Pratt & Whitney Canada (PWC or P&WC) is a Canada-based aircraft engine manufacturer. PWC's headquarters are in Longueuil, Quebec, south of Montreal. It is a division of the larger US-based Pratt & Whitney (P&W), itself a business unit of RTX ...

. Its design was started in 1958, it first ran in February 1960, first flew on 30 May 1961, entered service in 1964, and has been continuously updated since. The PT6 consists of two basic sections: a gas generator with accessory gearbox, and a free-power turbine with reduction gearbox. In aircraft, the engine is often mounted "backwards," with the intake at the rear and the exhaust at the front, so that the turbine is directly connected to the propeller. Many variants of the PT6 have been produced, not only as turboprops but also as

turboshaft A turboshaft engine is a form of gas turbine that is optimized to produce shaft horsepower rather than jet thrust. In concept, turboshaft engines are very similar to turbojets, with additional turbine expansion to extract heat energy from the ex ...

engines for helicopters, land vehicles, hovercraft, and boats; as auxiliary power units; and for industrial uses. By November 2015, 51,000 had been produced, which had logged 400 million flight hours from 1963 to 2016. It is known for its reliability, with an in-flight shutdown rate of 1 per 651,126 hours in 2016. The PT6A turboprop engine covers the power range between , while the PT6B/C are

variants for helicopters.

Development

In 1956, Pratt & Whitney Canada's (PWC) president, Ronald Riley, ordered engineering manager Dick Guthrie to hire a team of gas turbine specialists to design a small gas turbine engine. Demand for the

Wasp A wasp is any insect of the narrow-waisted suborder Apocrita of the order Hymenoptera which is neither a bee nor an ant; this excludes the broad-waisted sawflies (Symphyta), which look somewhat like wasps, but are in a separate suborder ...

radial engine The radial engine is a reciprocating engine, reciprocating type internal combustion engine, internal combustion engine configuration in which the cylinder (engine), cylinders "radiate" outward from a central crankcase like the spokes of a wheel. ...

was still strong and its production was profitable but the aim was to become Canada's prime engine company by focusing on a small gas turbine engine. Riley gave Guthrie a modest budget of C$100,000. Guthrie recruited twelve engineers with experience gained at various places including the National Research Council in

Ottawa Ottawa is the capital city of Canada. It is located in the southern Ontario, southern portion of the province of Ontario, at the confluence of the Ottawa River and the Rideau River. Ottawa borders Gatineau, Gatineau, Quebec, and forms the cor ...

Orenda Engines Orenda Engines was a Canadian aircraft engine manufacturer and parts supplier. As part of the earlier Avro Canada conglomerate, which became Hawker Siddeley Canada, they produced a number of military jet engines from the 1950s through the 1970 ...

Ontario Ontario is the southernmost Provinces and territories of Canada, province of Canada. Located in Central Canada, Ontario is the Population of Canada by province and territory, country's most populous province. As of the 2021 Canadian census, it ...

, Bristol Aero Engines and

Blackburn Aircraft Blackburn Aircraft Limited was a British aircraft manufacturer from 1914 to 1963 that concentrated mainly on naval and maritime aircraft. History Blackburn Aircraft was founded by Robert Blackburn (aviation pioneer), Robert Blackburn and Jessy ...

. They completed the detailed design of an engine for Canadair's small jet trainer, the CL-41. It was a thrust turbojet but the design was taken over by P&WA who developed it into the

Pratt & Whitney JT12 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. Design and development The J60 conception and project design began in July 1957 ...

. The team had to wait for market assessments to define their next engine, a turboprop for twin-engined aircraft, the PT6.https://www.flightglobal.com/pdfarchive/view/1990/1990%20-%200238.html?search=pt6%20phenomenon The early development of the PT6, which first ran in December 1963, was beset with engineering problems, cost overruns and lack of sales. It was almost cancelled. The team lacked the ability to deal with the technical difficulties, i.e. how to develop the engine, because, as one of the team Elvie Smith recalled, they came from research and design backgrounds. They learned how to run a development program, such as testing around the clock rather than on one shift, from a PWA team which directed the development for several months. The PT6 first flew on 30 May 1961, mounted as a third engine in the nose of a

Beech 18 The Beechcraft Model 18 (or "Twin Beech", as it is also known) is a 6- to 11-seat, twin-engined, low-wing, tailwheel light aircraft manufactured by the Beech Aircraft Corporation of Wichita, Kansas. Continuously produced from 1937 to Novembe ...

aircraft which had been converted by

de Havilland The de Havilland Aircraft Company Limited (pronounced , ) was a British aviation manufacturer established in late 1920 by Geoffrey de Havilland at Stag Lane Aerodrome Edgware on the outskirts of North London. Operations were later moved to ...

at its Downsview facility in

North York, Ontario North York is a former township and city and is now one of the six administrative districts of Toronto, Ontario, Canada. It is located in the northern area of Toronto, centred around Yonge Street, north of Ontario Highway 401. It is bounded by ...

. Full-scale production started in 1963, with service entry the following year. The Beech 18 continued as a PT6 and propeller flying test-bed until it was replaced with a Beech King Air in 1980. The King Air test-engine or propeller replaced one of the standard ones. In 1974 the Beech 18 had been unable to fly fast enough and high enough to test the PT6A-50 for the

de Havilland Canada Dash 7 The de Havilland Canada DHC-7, popularly known as the Dash 7, is a turboprop-powered regional airliner with short take-off and landing (STOL) performance. Variants were built with 50–54 seats. It first flew in 1975 and remained in producti ...

so a

Vickers Viscount The Vickers Viscount is a retired British medium-range turboprop airliner first flown in 1948 by Vickers-Armstrongs. A design requirement from the Brabazon Committee, it entered service in 1953 and was the first turboprop-powered airliner. T ...

was modified as a PT6 test-bed with a Dash-7 installation in the nose. The first production PT6 model, the PT6A-6, was certificated in December 1963. The first application was the

Beech Queen Air The Beechcraft Queen Air is a twin-engined light aircraft produced by Beechcraft in numerous versions from 1960 to 1978. Based upon the Twin Bonanza, with which it shared key components such as wings, engines, and tail surfaces, it had a larg ...

, enticing the U.S. Army to buy a fleet of the U-21 Ute variant. This helped launch the King Air with Beechcraft selling about 7,000 by 2012. From 1963 to 2016

power-to-weight ratio Power-to-weight ratio (PWR, also called specific power, or power-to-mass ratio) is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another. Power-to-weight ratio is a measurement ...

was improved by 50%,

brake specific fuel consumption Brake-specific fuel consumption (BSFC) is a measure of the fuel efficiency of any prime mover that burns fuel and produces rotational, or shaft power. It is typically used for comparing the efficiency of internal combustion engines with a shaft ou ...

by 20% and

overall pressure ratio In aeronautical engineering, overall pressure ratio, or overall compression ratio, is the amount of times the pressure increases due to ram compression and the work done by the compressor stages. The compressor pressure ratio is the ratio of the ...

reached 14:1. Its development continues and while today its basic configuration is the same as in 1964, updates have included a cooled first-stage turbine vane, additional compressor and turbine stages and

single-crystal In materials science, a single crystal (or single-crystal solid or monocrystalline solid) is a material in which the crystal lattice of the entire sample is continuous and unbroken to the edges of the sample, with no grain boundaries. The absen ...

turbine blades in the early 1990s. Its pressure ratio is 13:1 in the

AgustaWestland AW609 The Leonardo AW609, formerly the AgustaWestland AW609, and originally the Bell-Agusta BA609, is a twin-engined tiltrotor VTOL aircraft with an overall configuration similar to that of the Bell Boeing V-22 Osprey. It is capable of landing vertic ...

tiltrotor, the highest that can be used without cooled turbine blades. In response to the General Electric GE93, in 2017 Pratt & Whitney Canada started testing core technology and systems for a proposed engine to replace the most powerful versions of the PT6. It was considered likely to be a development of the PT6C core, and would fit between the PT6C-67C/E and the

PW100 The Pratt & Whitney Canada PW100 aircraft engine family is a series of turboprops manufactured by Pratt & Whitney Canada. Pratt & Whitney Canada dominates the turboprop market with 89% of the turboprop regional airliner installed base in 2016, ...

family. It was expected to be ready to launch by the end of 2017 for an initial

helicopter A helicopter is a type of rotorcraft in which Lift (force), lift and thrust are supplied by horizontally spinning Helicopter rotor, rotors. This allows the helicopter to VTOL, take off and land vertically, to hover (helicopter), hover, and ...

platform with a 10-15% reduction in

. This 2,000 hp engine would target a possible new market such as a Super PC-12, a more powerful TBM, or a bigger King Air.

PW100

When

de Havilland Canada De Havilland Aircraft of Canada Limited (DHC) is a Canadian aircraft manufacturer that has produced numerous aircraft models since its inception including the popular De Havilland Canada Dash 8, Dash 8. The company's primary facilities were loca ...

asked for a much larger engine for the

DHC-8 The De Havilland Canada DHC-8, commonly known as the Dash 8, is a series of turboprop-powered regional airliners, introduced by de Havilland Canada (DHC) in 1984. DHC was bought by Boeing in 1986, then by Bombardier in 1992, then by Longv ...

, roughly twice the power of the Large PT6, Pratt & Whitney Canada responded with a new design initially known as the PT7, later renamed

Pratt & Whitney Canada PW100 The Pratt & Whitney Canada PW100 aircraft engine family is a series of turboprops manufactured by Pratt & Whitney Canada. Pratt & Whitney Canada dominates the turboprop market with 89% of the turboprop regional airliner installed base in 2016, ...

Design

The rate at which parts deteriorate in a gas turbine is unbalanced insofar as the hottest parts need replacing or repairing more often than the cooler-running parts. If the hotter parts can be removed without disturbing the rest of the engine, for example without removing the complete engine from the aircraft, maintenance costs are reduced. It was achieved with the PT6 by having the hottest parts, the gas generator turbine and combustor, at the propeller end. They are removed without disturbing the rest of the engine with its connections to the aircraft. This arrangement was patented by designer Newland, one of the original PT6 team. A similar general arrangement with a free-turbine power take-off at the exhaust end (the P.181 engine) had been shown by

Armstrong Siddeley Armstrong Siddeley was a British engineering group that operated during the first half of the 20th century. It was formed in 1919 and is best known for the production of luxury vehicles and aircraft engines. The company was created following t ...

Motors at the

Farnborough Airshow The Farnborough International Airshow is a trade exhibition for the aerospace and defence industries, where civilian and military aircraft are demonstrated to potential customers and investors in Farnborough, Hampshire. Since its first show in ...

in 1957. An early design improvement, incorporated in the PT6A-20, was the pipe diffuser patented by Vrana, another of the original PT6 team. It replaced the vaned type diffuser used in centrifugal compressors. The pipe diffuser became standard design practice for P&WC. Another design change improved the part-speed functioning of the compressor. It is common to bleed air from a compressor to make it work properly at low engine speeds. The PT6 has a bleed arrangement which reuses the bleed air by returning it in a tangential direction at the entry to the compressor, an idea patented by Schaum et al. and titled "Turbine Engine With Induced Pre-Swirl at Compressor Inlet". It acts like a variable vane and is known as a "Jet-Flap". All versions of the engine consist of two sections that can be easily separated for maintenance: a gas generator supplies hot pressurized gas to a free power turbine. The starter has to accelerate only the gas generator, making the engine easy to start, particularly in cold weather. Air enters the gas-generator through an inlet screen into the low-pressure

axial compressor An axial compressor is a gas compressor that can continuously pressurize gases. It is a rotating, airfoil-based compressor in which the gas or working fluid principally flows parallel to the axis of rotation, or axially. This differs from other ...

. This has three stages on small and medium versions of the engine and four stages on large versions. The air then flows into a single-stage

centrifugal compressor Centrifugal compressors, sometimes called impeller compressors or radial compressors, are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. They achieve pressure rise by adding energy to the continuous flow of fluid through th ...

, through a folded annular

combustion chamber A combustion chamber is part of an internal combustion engine in which the air–fuel ratio, fuel/air mix is burned. For steam engines, the term has also been used for an extension of the Firebox (steam engine), firebox which is used to allow a mo ...

, and finally through a single-stage turbine that powers the compressors at about 45,000 rpm. Hot gas from the gas generator flows into the power turbine, which turns at about 30,000 rpm. It has one stage on the small engines and two stages on the medium and large ones. For turboprop use, this powers a two-stage planetary output reduction gearbox, which turns the propeller at a speed of 1,900 to 2,200 rpm. The exhaust gas then escapes through two side-mounted ducts in the power turbine housing. The turbines are concentric with the combustion chamber, reducing overall length. In most aircraft installations the PT6 is mounted so that the intake end of the engine is towards the rear of the aircraft, leading to it being known by many as the "back-to-front" engine. This places the power section at the front of the nacelle, where it can drive the propeller directly without the need for a long shaft. Intake air is usually fed to the engine via an underside mounted duct, and the two exhaust outlets are directed rearward. This arrangement aids maintenance by allowing the entire power section to be removed along with the propeller, exposing the gas-generator section. To facilitate rough-field operations, foreign objects are diverted from the compressor intake by inertial separators in the inlet. In some installation such as the PT6A-66B version in the Piaggio P.180 Avanti, the engine is reversed, with the propeller acting as a "pusher", the accessory gearbox facing the front of the aircraft.

Operational history

By the 40th anniversary of its maiden flight in 2001, over 36,000 PT6As had been delivered, not including the other versions. Up to October 2003, 31,606 delivered engines have flown more than 252 million hours. Till November 2015, 51,000 have been produced. The family logged 400 million flight hours from 1963 to 2016. The PT6 family is known for its reliability with an in-flight shutdown rate of 1 per 333,333 hours up to October 2003, 1 per 127,560 hours in 2005 in Canada, 1 per 333,000 hours from 1963 to 2016, 1 per 651,126 hours over 12 months in 2016.

Time between overhaul Time between overhauls (abbreviated as TBO or TBOH) is the manufacturer's recommended number of running hours or calendar time before an aircraft engine or other component requires overhaul. On rotorcraft, many components have recommended or ma ...

s is between 3,600 and 9,000 hours and hot-section inspections between 1,800 and 2,000 hours. Early PT6 versions lacked a

FADEC A full authority digital engine (or electronics) control (FADEC) is a system consisting of a digital computer, called an "electronic engine controller" (EEC) or " engine control unit" (ECU), and its related accessories that control all aspects of a ...

autothrottle An autothrottle (automatic throttle; also known as autothrust, A/T, or A/THR) is a system that allows a pilot to control the power setting of an aircraft's engines by specifying a desired flight characteristic, rather than manually controlling t ...

could be installed as an aftermarket upgrade with an

actuator An actuator is a machine element, component of a machine that produces force, torque, or Displacement (geometry), displacement, when an electrical, Pneumatics, pneumatic or Hydraulic fluid, hydraulic input is supplied to it in a system (called an ...

, initially for single-engine aircraft like the

PC-12 PC-1 (Pacific Crossing 1) is a submarine telecommunications cable system in the North Pacific Ocean linking the United States to Japan. It has landing points in: # Shima, Mie Prefecture, Japan # Ajigaura, Hitachinaka, Ibaraki Prefecture, Japan ...

and potentially in twin-turboprop aircraft. In October 2019 the PT6 E-Series was launched on the PC-12 NGX, the first general aviation turboprop with an electronic propeller and engine control system with a single lever and better monitoring for longer maintenance intervals, increased from 300 to 600 hours, and a TBO increased by 43% to 5,000 hours, reducing engine operating costs by at least 15%. In April 2022,

Daher Daher (also stylized as DAHER) is a French industrial conglomerate. It is operational across the aerospace, defence, nuclear, and automotive industrial sectors in the fields of manufacturing, services, and transport. It was founded in 1863 ...

announced that the updated SOCATA TBM-960 would be powered by the PT6E-66XT.

Variants

The main variant, the PT6A, is available in a wide variety of models, covering the power range between in the original series, and up to in the 'large' lines. The PT6B and PT6C are

variants for helicopters. In US military use, they are designated as T74 or T101. Several other versions of the PT6 have appeared over time: *the Large PT6 added an extra axial compressor stage(4), and another power turbine stage(2) and a deeper output reduction, producing almost twice the power output, between . *the Medium PT6 added another power turbine stage(2) -41 thru the -60 engines *the PT6B is a

turboshaft model, featuring an offset reduction gearbox with a freewheeling clutch and power turbine governor, producing at 4,500 rpm. *the PT6C is a helicopter model, with a single side-mounted exhaust, producing at 30,000 rpm, which is stepped down in a user-supplied gearbox. *the PT6E is a large PT6A derivative equipped with digital engine control. *the PT6T Twin-Pac consists of two PT6 engines driving a common-output reduction gearbox, producing almost at 6,000 rpm. *the ST6 is a version intended for stationary applications, originally developed for the

UAC TurboTrain The UAC TurboTrain was an early high-speed, gas turbine train manufactured by United Aircraft that operated in Canada between 1968 and 1982 and in the United States between 1968 and 1976. It was one of the first gas turbine-powered trains to en ...

, and now widely used as

auxiliary power unit An auxiliary power unit (APU) is a device on a vehicle that provides energy for functions other than propulsion. They are commonly found on large aircraft and naval ships as well as some large land vehicles. Aircraft APUs generally produce 115&n ...

s on large aircraft, as well as many other roles. The PT6A family is a series of free-turbine turboprop engines providing

Small

Medium

Large

;T74-CP-700 :(PT6A-20) United States military designation for the PT6A-20/27, used in the Beechcraft U-21 Ute. ;T74-CP-702 :(PT6A-29) ;T101 :United States military designation for the T101-CP-100 / PT6A-45R, used in the

Shorts 330 The Short 330 (also SD3-30) is a small turboprop transport aircraft produced by Short Brothers. It seats up to 30 people and was relatively inexpensive and had low maintenance costs at the time of its introduction in 1976. The 330 was based on ...

and Shorts C-23 Sherpa. ;PT6B-9 :The PT6B-9 is a turboshaft engine for use in helicopters; a later mark of PT6B is rated at . ;PT6B-16: ;PT6C :The PT6C is a engine for helicopters and tiltrotors. ;PT6D-114A :The PT6D-114A is based on the PT6A-114A; the main difference is the deletion of the second-stage reduction gearing and output shaft, because the engine is intended for integration with a combining gearbox incorporating power turbine governors and a propeller output shaft. ;Soloy Dual Pac:2x PT6D-114A engines driving a single propeller through a combining gearbox, capable of independent operation. ; PT6T :Twin PT6 power units combining outputs through a gearbox for use in helicopters. ;ST6 :The ST6 is a variant of the PT6 that was originally developed as a powerplant for the

power cars, but later developed as a stationary power generator and

. ;ST6B :The ST6B-62 was a version of the PT6 developed for use in the

STP-Paxton Turbocar The STP-Paxton Turbocar was an American racing car, designed by Ken Wallis as the STP entry in the Indianapolis 500. Parnelli Jones drove it in the 1967 event. After leading for much of the race, a transmission failure with only eight miles left e ...

, raced in the 1967

Indianapolis 500 The Indianapolis 500, formally known as the Indianapolis 500-Mile Race, and commonly shortened to Indy 500, is an annual automobile race held at the Indianapolis Motor Speedway in Speedway, Indiana, United States, an enclave suburb of Indian ...

. ;STN 6/76 :The STN 6/76 was a version of the PT6 developed for use in the

Lotus 56 The Lotus 56 was a gas turbine-powered four-wheel-driven racing car, designed by Maurice Philippe as Team Lotus's STP-backed entry in the 1968 Indianapolis 500. All three cars entered and retired from the race with Joe Leonard's car expiring wh ...

, raced in the 1968

and later in

Formula One Formula One (F1) is the highest class of worldwide racing for open-wheel single-seater formula Auto racing, racing cars sanctioned by the Fédération Internationale de l'Automobile (FIA). The FIA Formula One World Championship has been one ...

races, in 1971.

Applications

The engine is used in over 100 different applications.

PT6A

AASI Jetcruzer The AASI Jetcruzer was an American single turboprop light civil transport made by Advanced Aerodynamics and Structures Inc. The Jetcruzer had an unusual configuration, with a single turboprop engine driving a pusher propeller, a prominent canard ...

* Aero Commander 680T (PT6 conversion) * Aero Ae 270 Ibis *

AHRLAC Holdings Ahrlac The AHRLAC (Advanced High Performance Reconnaissance Light Aircraft), also known as Mwari, is a South African light reconnaissance aircraft, reconnaissance and counter-insurgency aircraft developed by Paramount Aerospace Industries, which start ...

Air Tractor AT-400 The Air Tractor AT-400 is a family of agricultural aircraft that first flew in the United States in September 1979. Type certification was awarded to Air Tractor in April 1980. Of low-wing monoplane taildragger configuration, they carry a chem ...

* Air Tractor AT-501 * Air Tractor AT-602 *

Air Tractor AT-802 The Air Tractor AT-802 is an American agricultural aircraft that may also be adapted into Aerial firefighting, fire-fighting or armed versions. It first flew in the United States in October 1990 and is manufactured by Air Tractor. The AT-802 carr ...

* Antilles Super Goose *

Antonov An-28 The Antonov An-28 (NATO reporting name Cash) is a twin-engined light turboprop transport aircraft, developed from the Antonov An-14M. It was the winner of a competition against the Beriev Be-30, for use by Aeroflot as a short-range airliner. It ...

* Ayres Turbo Thrush *

Basler BT-67 The Basler BT-67 is a utility aircraft produced by Basler Turbo Conversions of Oshkosh, Wisconsin. It is a remanufactured and modified Douglas C-47 Skytrain / Douglas DC-3; the modifications are designed to significantly extend the DC-3's servic ...

Beechcraft 1900 The Beechcraft 1900 is a U.S made twin-engine turboprop regional airliner manufactured by Beechcraft. It is also used as a freight aircraft and corporate transport, and by several governmental and military organizations. With customers favoring ...

Beechcraft Model 99 The Beechcraft Model 99 is a civilian aircraft produced by American manufacturer Beechcraft. It is also known as the Beech 99 Airliner and the Commuter 99. The 99 is a twin-engine, unpressurized, 15 to 17 passenger seat turboprop aircraft, deriv ...

* Beechcraft A36TC Bonanza (turbine conversion) *

Beechcraft C-12 Huron The Beechcraft C-12 Huron is the military designation for a series of twin-engine turboprop aircraft based on the Beechcraft Super King Air and Beechcraft 1900. C-12 variants are used by the United States Air Force, Army, Navy and Marine Corps. ...

Beechcraft King Air The Beechcraft King Air is a line of American utility aircraft produced by Beechcraft. The King Air line comprises a number of twin-turboprop models that have been divided into two families. The Model 90 and 100 series developed in the 1960s ...

* Beechcraft Lightning * Beech 18 series (turbine conversion) * Beechcraft Model 87 *

Beechcraft RC-12 Guardrail The Beechcraft RC-12 Guardrail is an airborne signals intelligence (SIGINT) collection platform based on the Beechcraft King Air and Super King Air. While the US military and specifically the United States Army have numerous personnel transpor ...

* Beechcraft RU-21C Ute * Beechcraft Starship *

Beechcraft Super King Air The Beechcraft Super King Air family is part of a line of twin-turboprop aircraft produced by Beechcraft. The Model 200 and Model 300 series were originally marketing, marketed as the "Super King Air" family; the "Super" designation was droppe ...

Beechcraft T-6 Texan II The Beechcraft T-6 Texan II is a single-engine turboprop aircraft built by Textron Aviation. It is a license-built Pilatus PC-9, a trainer aircraft. The T-6 replaced the United States Air Force's Cessna T-37B Tweet and the United States Nav ...

* Beechcraft T-34C Turbo-Mentor * Beechcraft T-44 Pegasus * Beriev Be-30K * Calidus B-250 * CASA C-212 series 300P *

Cessna 208 Caravan The Cessna 208 Caravan is a utility aircraft produced by Cessna. The project was commenced on November 20, 1981, and the prototype first flew on December 9, 1982. The production model was certified by the FAA in October 1984 and its Cargoma ...

* Cessna P210N (turbine conversion) * Cessna 404 Titan (turbine conversion) * Cessna 421C Golden Eagle (turbine conversion) * Cessna 425 Corsair/Conquest I * Conair Turbo Firecat * Conroy Tri-Turbo-Three * de Havilland Canada DHC-2 Mk. III Turbo Beaver * de Havilland Canada DHC-2T Turbo Beaver * de Havilland Canada DHC-3 Otter (turbine conversions) *

de Havilland Canada DHC-6 Twin Otter The de Havilland Canada DHC-6 Twin Otter is a Canadian STOL (Short Takeoff and Landing) utility aircraft developed by de Havilland Canada in the mid-1960s and still in production today. Built by De Havilland Canada from 1965 to 1988, Viking ...

* Dominion UV-23 Scout * Dornier Do 128 Turbo Skyservant * Dornier Seawings Seastar * Douglas DC-3 (turbine conversions) * Epic LT Dynasty *

Embraer EMB 110 Bandeirante The Embraer EMB 110 Bandeirante (English: ''pioneer'') is a Brazilian twin-turboprop light transport aircraft designed by Embraer for military and civil use. The EMB 110 was designed by the French engineer Max Holste; it had been designed in ...

Embraer EMB 121 Xingu The Embraer EMB 121 Xingu (, named after the Xingu River) is a twin-turboprop fixed-wing aircraft built by the Brazilian aircraft manufacturer, Embraer. The design is based on the EMB 110 Bandeirante, using its wing and engine design merged wit ...

Embraer EMB 312 Tucano The Embraer EMB 312 Tucano (English: ''Toucan'') is a Monoplane#Low, low-wing, tandem-seat, single-turboprop, basic trainer (aircraft), trainer and light attack aircraft developed and produced by Embraer in Brazil. The Brazilian Air Force sponso ...

Embraer EMB 314 Super Tucano The Embraer EMB 314 Super Tucano (English: ''Super Toucan''), also named ALX or A-29, is a Brazilian turboprop light attack aircraft, attack and Counter-insurgency_aircraft, counter-insurgency aircraft designed and built by Embraer as a developm ...

* Frakes Mohawk 298 * Frakes Turbocat * Gulfstream American Hustler 400 * Grumman Mallard (turbine conversion) * Grumman Goose (turbine conversion) *

Harbin Y-12 The Harbin Y-12 ( zh, c=运-12, p=Yùn-12) is a high wing twin-engine turboprop utility aircraft built by Harbin Aircraft Industry Group (HAIG). It is the first Chinese-designed and produced aircraft to receive type certificate from the FAA in M ...

Helio AU-24 Stallion The Helio AU-24 Stallion was an American armed gunship, Counter-insurgency aircraft, counter-insurgency, and utility transport developed for the United States Air Force. A total of 20 were built during the Vietnam War, with most of the aircraft ...

IAI Arava The Israeli Aircraft Industries Arava (, "Willow" or "Steppe" or "Desert", named after the Aravah of the Jordan Rift Valley) is a light STOL utility transport aircraft developed and produced by Israeli aerospace company Israel Aerospace Industri ...

IAI Eitan The IAI Eitan (איתן – "Steadfast"; export designation Heron TP) is an unmanned reconnaissance aircraft developed in Israel in the early 21st century by the Malat division of Israel Aerospace Industries.Egozi 2008 The aircraft is a newer v ...

Indonesian Aerospace N-219 The Indonesian Aerospace N-219 Nurtanio is a light STOL utility aircraft developed by Indonesian Aerospace. Its maiden flight was in August 2017 and according to Indonesian Aerospace's CEO at the time, the plane was developed without any foreig ...

* JetPROP DLX *

Kestrel K-350 The Kestrel K-350 or Kestrel (previously the Kestrel JP10) is a high-performance, single engine turboprop, all-composite, six-seat aircraft. The proof-of-concept (POC) first flew on 29 July 2006 and by April 2010, registered N352F, had logged ...

KAI KT-1 The KAI KT-1 Woongbi (korean language, Hangul: KT-1 웅비) is a South Korean single-engined turboprop, basic training aircraft. It was jointly developed by Korea Aerospace Industries (KAI) and the Agency for Defense Development (ADD). Developm ...

Let L-410 Turbolet The Let L-410 Turbolet is a twin-engine short-range transport aircraft designed and produced by the Czech Republic, Czech aircraft manufacturer Aircraft Industries, Let Kunovice (named Aircraft Industries since 2005). It was developed as the ''L ...

Lancair Evolution The Lancair Evolution is an American Pressurization, pressurized, low wing, four-place, single engine light aircraft, made from carbon fiber composite, developed by Lancair and supplied as an Homebuilt aircraft, amateur-built kit by Evolution ...

NAL Saras The NAL Saras () is the first Indian multi-purpose civilian aircraft in the light transport aircraft category as designed by the National Aerospace Laboratories (NAL). In January 2016, it was reported that the project had been cancelled. B ...

* NDN Fieldmaster * FTS Turbo Firecracker *

PAC 750XL The PAC P-750 XSTOL, (formerly known as the PAC 750XL) is a utility aircraft of conventional Aluminium, all-metal low-wing monoplane design, with fixed Tricycle gear, tricycle undercarriage. Combining the engine and wings of the PAC Cresco with ...

* PAC Cresco * Piaggio P.180 Avanti * Pilatus PC-6/B Turbo-Porter *

Pilatus PC-7 The Pilatus PC-7 Turbo Trainer is a low-wing tandem-seat training aircraft, designed and manufactured in Switzerland by Pilatus Aircraft. The aircraft is capable of all basic training functions, including aerobatics, instrument, tactical, and ...

Pilatus PC-9 The Pilatus PC-9 is a single-engine, low-wing tandem-seat turboprop training aircraft designed and manufactured by Pilatus Aircraft of Switzerland. Developed as a more powerful evolution of the preceding Pilatus PC-7, the PC-9 features an enlar ...

Pilatus PC-12 The Pilatus PC-12 is a pressurized, single-engined, turboprop aircraft manufactured by Pilatus Aircraft of Stans, Switzerland since 1991. It was designed as a high-performance utility aircraft that incorporates a large aft cargo door in addi ...

Pilatus PC-21 The Pilatus PC-21 is a turboprop-powered advanced Trainer (aircraft), trainer with a stepped tandem cockpit. It is manufactured by Pilatus Aircraft of Switzerland. Development In November 1997 Pilatus flew a modified Pilatus PC-7, PC-7 Mk.II in ...

* Piper PA-31P (turbine conversion) *

Piper PA-31T Cheyenne The Piper PA-31T Cheyenne is a twin-engine turboprop development of the earlier Piper PA-31 Navajo, PA-31P Pressurized Navajo. Development Originally, the aircraft was an upgraded version of the Pressurized Navajo equipped with two Pratt & Whitn ...

* Piper PA-42 Cheyenne III * Piper PA-46-500TP Meridian * Piper T1040 * PZL-130T Turbo Orlik and PZL-130TC-II Orlik * PZL M-18 Dromader (turbine conversion) *

PZL M28 Skytruck The PZL M28 Skytruck is a family of Polish light utility aircraft with STOL capability produced by PZL Mielec for military and civilian use. They are mainly used in transport, patrol and maritime reconnaissance roles. The maritime patrol and ...

Quest Kodiak The Daher Kodiak (formerly Quest Kodiak) is an American utility aircraft designed by and originally manufactured by Quest Aircraft in Sandpoint, Idaho. Manufacturing was taken over by Daher in 2019 after its purchase of Quest Aircraft. The h ...

Reims-Cessna F406 Caravan II The Reims-Cessna F406 Caravan II is a turboprop twin engine utility aircraft manufactured and designed by Reims Aviation in cooperation with Cessna. Design and development The F406 Caravan II is a twin turboprop engined, fourteen-seat low-win ...

* Saunders ST-27/ST-28 *

Scaled Composites ATTT The Scaled Composites Model 133-4.62 ATTT, or Advanced Technology Tactical Transport was a technology demonstration project built by Burt Rutan's Scaled Composites in 1986 under contract to DARPA. Design and development In the mid-1980s, the Am ...

Shorts 360 The Short 360 (also SD3-60; also Shorts 360)Mondey, David. ''Encyclopedia of the World's Commercial and Private Aircraft''. New York: Crescent Books, 1981. , p. 228. is a commuter aircraft that was built by UK manufacturer Short Brothers durin ...

Short C-23 Sherpa The Short C-23 Sherpa is a small military transport aircraft built by Short Brothers. It was designed to operate from unpaved runways and make STOL, short takeoff and landings (STOL). It features a large squared fuselage with a full-width rea ...

* Socata TBM * Spectrum SA-550 * Swearingen SA26-T Merlin IIA * US Aircraft A-67 Dragon *

TAI Hürkuş The TAI Hürkuş (Free Bird) is a tandem two-seat, low-wing, single-engine, turboprop aircraft being produced by Turkish Aerospace Industries (TAI) as a trainer and ground attack aircraft for the Turkish Armed Forces. The aircraft is named af ...

* Baykar Bayraktar Akıncı-B

PT6B

AgustaWestland AW119 Koala The AgustaWestland AW119 Koala, produced by Leonardo since 2016, is an eight-seat utility helicopter powered by a single turboshaft engine produced for the civil market. Introduced as the Agusta A119 Koala prior to the Agusta-Westland merger, ...

* Avicopter AC313 * Changhe Z-8F * Lockheed XH-51 *

Sikorsky S-76 The Sikorsky S-76 is a medium-size commercial utility helicopter designed and produced by the American helicopter manufacturer Sikorsky Aircraft. It is the company's first helicopter specifically developed for the civilian market. The S-76 ...

B * Westland Lynx 606

PT6C

Airbus Helicopters H175 The Airbus Helicopters H175 (formerly Eurocopter EC175) is a 7-ton class super-medium utility helicopter produced by Airbus Helicopters. In China, the H175 is produced by the Aviation Industry Corporation of China (AVIC) as the Avicopter AC352. ...

/Avicopter Z-15 *

AgustaWestland AW139 The AgustaWestland AW139, now known as the Leonardo AW139, is a 15-seat medium-sized twin-engined helicopter developed and produced by the Italian helicopter manufacturer AgustaWestland, now part of Leonardo. It is marketed at several differ ...

* Bell UH-1 Global Eagle upgrade

PT6D

* Soloy Pathfinder 21

PT6E

NGX

ST6

* Lockheed L1011 TriStar (as an APU) *

Indy racer *

STN

USAC and

Formula 1 Formula One (F1) is the highest class of worldwide racing for open-wheel single-seater formula Auto racing, racing cars sanctioned by the Fédération Internationale de l'Automobile (FIA). The FIA Formula One World Championship has been one ...

racing car

Engines on display

New England Air Museum The New England Air Museum (NEAM) is an American aerospace museum located adjacent to Bradley International Airport in Windsor Locks, Connecticut. The museum consists of three display hangars with additional storage and restoration hangars. Its ...

, Connecticut (cutaway)

Specifications (PT6A-6)

Gas Turbine Engines

References

External links

* * * * * ** {{DEFAULTSORT:Pratt and Whitney Canada PT6 1960s turboprop engines Pratt & Whitney Canada aircraft engines Mixed-compressor gas turbines