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Contents.Development The U.S. Military came very close to not procuring the UH-1N Twin Huey because of the PT6T. The purchase of the aircraft for U.S.
Free PT6A Training Material - download site update. I am curious what PWC did to make the PT6-28 engine different from the -27for the high altitude capability. It takes to do this. Now if someone wants to hire me to do a set of free manuals I come pretty reasonable but I think you would be very surprised at the end cost. A small aircraft.
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Military use was opposed by the Chairman of the at the time,. Rivers took this position because the PT6T was produced in Canada.
The Canadian government had not supported U.S. Involvement in Vietnam, and had opposed U.S. Policies in southeast Asia, as well as accepting U.S. Rivers was also concerned that procurement of the engines would result in a negative trade deficit situation with Canada. Congress only approved the purchase when it was assured that a U.S. Source would be found for the PT6T engines. This source was Pratt & Whitney Engine Services in, which was established in 1971 to assemble and test new T400-WV-402 engines.
As a result, the U.S. Military ordered 294 Bell 212s under the designation UH-1N, with deliveries commencing in 1970. Variants.
![Pt6 Engine Manual Pt6 Engine Manual](http://online.anyflip.com/qxaf/hpbc/files/thumb/3.jpg?1555003770)
Foreign object damage (FOD) deflection screen on a Bell 412's PT6T PT6T-3 Basic production model PT6T-3A Same as the PT6T-3 but with aluminum (instead of magnesium) gearbox casting, No longer used. PT6T-3B Same as the PT6T-3, except for the single power section contingency ratings and has PT6T-6 compressor turbine components.
PT6T-3BE Same as the PT6T-3B with the removal of the torque sharing function in the torque control and is a PT6T-3BE gearbox fitted with two PT6T-3B power sections. PT6T-3BF Similar to the PT6T-3B, except 30-minute one engine inoperative (OEI) rating is equivalent to the 2½ minute OEI rating. PT6T-3BG Similar to the PT6T-3BE, except 30 minute OEI rating is equivalent to the 2½ minute OEI rating. PT6T-3D Same as the PT6T-3B, except for improved hot section hardware to allow for increased ratings. PT6T-3DE Same as the PT6T-3D, except the continuous OEI rating is replaced by a 30 minutes rating. PT6T-3DF Same as the PT6T-3DE, except for improved hot section hardware to allow for increased ratings.
PT6T-6 Same as the PT6T-3, except for the 2½ min rating and higher ratings and improved engine parts. PT6T-6B Same as the PT6T-6 with the removal of the torque sharing function in the torque control and is a PT6T-6B gearbox with two PT6T-6 power sections. PT6T-9 Similar to the PT6T-3DF, except for an improved hot section and it is equipped with an engine electronic control system. T400-C-400 Military PT6T-3 T400-CP-401 Military variant used on the VH-1N variant of the UH-1N.
T400-WV-402 Military PT6T-6, assembled by Pratt & Whitney Engine Services, Inc.
About the Pratt & Whitney PT6A:The Pratt & Whitney Canada PT6A is a family of twin-shaft turboprop enginesand the world's most popular engine in its class. As many as 69 different versions of the PT6A have been produced- with engine power ranging from 500 to 2,000 shp.In service, PT6A-powered aircraft are used for many different purposes such as transport of people;(both private and commercial), dropping cargo in adverse weather conditions; military pilot training, surveillance and other special missions;and supporting various environmental efforts. The strength of the PT6A family is its dependability and versatility.The PT6A is in service with both the U.S.
Air Force (MC-12W) and the U.S. Army (C-12).The MC-12W and C-12 are military special mission aircraft and mainly provide intelligence, surveillance, and reconnaissance (ISR).The C-12 is powered by two PT6A-60A engines with 1,050 shp each.Also, the PT6A is used on themilitary trainer aircraft, which provides undergraduate pilot training for the U.S. Air Force and U.S. Navy.The T-6 Texan II is powered by a single PT6A-68 engine with 1,100 shp.The PT6A engine is one of the most popular and proven power plants in its class.Over the years, new aerodynamic technologies have enabled the PT6A engine to gain more power withoutsignificantly increasing its size or weight. Other innovations have reduced greenhouse gas emissions,increased maintenance intervals, and enhanced the ease-of-operation.PT6A engines are currently in service with more than 6,500 aircraft operators in over 170 countries.Since the PT6A family entered service in the 1960s, more than 41,000 engines have been produced. To date, the PT6A hasaccumulated 335 million flying hours and is therefore a highly proven and durable engine.Sources Used: U.S.
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Manufacturer: Pratt & Whitney Canada Power: PT6A-60A: 1,050 shp; PT6A-68: 1,250 shpOverall Pressure Ratio at Maximum Power: UnknownCompressor: Axial flow/centrifugalCompressor Stages: 4-stage axial/1-stage centrifugalTurbine: 2 PT (2-stage axial power turbine)FADEC: NoLength: 72.5 in (1.84 m)Diameter: 19 in (48 cm)Dry Weight: UnknownPlatforms:PT6A-60A: C-12 Huron / MC-12WPT6A-68:Price/Unit Cost:PT6A-60A: $954,869 (in 2015)PT6A-68: $969,000 (in 2015)Introduced: 1961 (first PT6 engine)First Run: UnknownFirst Flight: May 30, 1961.
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