De la página de Pratt & Whitney Canada, todos los modelos que tienen como grupo motopropulsor a la PT-6 tienen reversa.
Y lo otro es que la reversa en todos los motores es una opción. Ejemplo, en el Marcel Dassault Falcon 20 equipado con General Electric CF-700 como las reversas eran
complicadas y el avión tiene velocidades de aproximación muy bajas la mayoria de los operadores decidieron no adquirir el avión con reversas y hasta algunos como
los que había en la Argentina las desinstalaron.
Hablar mal de una PT-6 porque se podría haber comprado Garret TPE-331, es como decir que un BMW es peor que un Mercedez Benz...y tenes un Bento...
http://www.pwc.ca/en/engines/pt6a
PT6A
More Than a Legend.
500 to 2,000 shaft horsepower class
The PT6A turboprop engine is a powerhouse that offers unmatched performance, reliability and value in its class of 500 – 2,000 shaft horsepower for a wide range of applications. From transporting people in business and airline aviation, to dropping cargo in the Antarctic darkness at 75 degrees below zero and supporting environmental efforts in reforestation programs, the dependability and versatility of the PT6A family continues to earn the highest respect from pilots worldwide.
Overview
The PT6A engine family remains the world's most popular engine in its class and is one of P&WC's greatest success stories. Experience gained from the PT6A has helped spawn many of the engine families that have made P&WC a world leader in the gas turbine engine market.
Dependability and versatility have been the hallmarks of the PT6A and continue to be the foundation of the many new PT6A models incorporating the very latest advanced technologies. New aerodynamic and material technologies have enabled the PT6 engine to gain more power without significantly increasing in size. Other innovations have reduced emissions, increased maintenance intervals and further enhanced ease of operation with the introduction of digital electronic control to small gas turbine engines.
Ranging in power from 500 shp to over 2,000 shp, PT6A engines are available in more than 69 models, offering unsurpassed flexibility and capability for a variety of applications. The numbers speak for themselves: members of the family currently power aircraft in service with more than 6,500 operators in more than 170 countries. More than 41,000 PT6A engines have been produced since the family entered service in the 1960s, accumulating 335 million flying hours. PT6A engines have demonstrated their versatility in powering aircraft applications spanning the airlines, general aviation, business, agricultural and utility markets.
Operators of PT6A engines are supported by P&WC's industry-leading global customer support. This includes over 30 P&WC-owned and designated service facilities around the world, more than 100 field support representatives on all major continents, a 24/7 Customer First Centre for rapid expert support, the most advanced diagnostic capabilities for this market and the largest pool of P&WC rental and exchange engines in the industry.
Features
The PT6A engine family continues to advance, incorporating the latest technologies in the drive to exceed our customers' expectations in performance, reliability, durability, fuel consumption and environmental friendliness. More than 69 PT6A models have been produced, ranging in shaft horsepower power from 500 shp to 2,000 shp. New aerodynamic and material technologies have enabled the PT6 engine to gain more power without significantly increasing in size. Other innovations have reduced emissions, increased maintenance intervals and further enhanced ease of operation with the introduction of digital electronic control to small gas turbine engines.
The novel PT6A configuration has proven a key attribute to its success: its rearward, reverse flow inlet and forward facing turbine section providing fast maintenance turn-around through on-wing hot section refurbishment in most aircraft installations. The PT6A is a two-shaft engine with a multi-stage compressor driven by a single-stage compressor turbine and an independent shaft coupling the power turbine to the propeller through an epicyclic concentric reduction gearbox.
The PT6A family of engines embodies three series of models with increasing power levels, referred to as PT6A 'Small', 'Medium' and 'Large.' The increased power levels are achieved through the increase of compressor air flow and increased number of power turbine stages. Most recent models enjoy the advantage of additional advanced technologies in materials, turbine cooling and aerodynamic design.
Multi- stage axial and single-stage centrifugal compressor
- Reverse flow, radial inlet with screen for FOD (Foreign Object Damage) protection
- Large high power PT6A models incorporate 4-stage axial and 1-stage centrifugal
- Small and Medium PT6A models incorporate 3-stage axial and 1-stage centrifugal
Reverse flow combustor
- Low emissions, high stability, easy starting, durable
Single-stage compressor turbine
- Cooled vanes in some models to maintain high durability
Independent 'free' power turbine with shrouded blades
- Large and Medium PT6A models incorporate 2-stage axial power turbine
- Small PT6A models incorporate 1-stage axial power turbine
- Forward facing output for fast hot section refurbishment
Epicyclic speed reduction gearbox
- Enables compact installation
- Output speed optimized for highest power and low propeller noise
- 1,700 to 2,200 rpm output speed
Electronic engine controls on multiple PT6A models
- Other models incorporate various control modules and over-ride features to promote ease of operation and safety of flight
Thermodynamic
Power
Class*
(ESHP***) Mechanical
Power
Class*
(SHP) Propeller
Speed
(Max. RPM) Height**
(Inches) Width**
(Inches) Length**
(Inches)
PT6A 'Small'
(A-11 to A-140) 600 to
1075 500 to
900 1,900 to
2,200 21 to
25 21.5 61.5 to
64
PT6A 'Medium'
(A-41 to A-62) 1,000 to
1,400 850 to
1,050 1,700 to
2,000 22 19.5 66 to
72
PT6A 'Large'
(A-64 to A-68) 1,400 to
1,900 700 to
1,700 1,700 to
2,000 22 19.5 69 to
75.5
* Powers are approximate values at take-off. Available at sea level, standard day, static conditions, uninstalled.
** Dimensions are approximate values.
*** Equivalent Shaft Horsepower: includes estimated equivalent contribution of exhaust thrust.
Applications
PT6A-114A Cessna 208/208B Caravan I
PT6A-11AG Air Tractor AT 402A/402B
Schweizer G-164B AG-Cat Turbine
PT6A-135A Beechcraft King Air F90-1/C90GT/C90GTi/C90GTx
Blackhawk XP135A Cheyenne Series
Blackhawk XP135A Conquest I
Blackhawk XP135A King Air 90 Series
Cessna Conquest I
Lancair International Inc. Evolution
Silverhawk 135/StandardAero C90/E90
StandardAero Cheyenne Series
StandardAero King Air F90
T-G Aviation Super Cheyenne®
Vazar Dash 3 Turbine Otter
PT6A-15AG Air Tractor AT 402A/402B
Air Tractor AT 502B
Frakes Turbo Cat Model A/B/C
Schweizer G-164B AG-Cat Turbine
PT6A-21 Beechcraft King Air C90A/B/SE
Turbine Air Bonanza
PT6A-25C Embraer EMB-312 Tucano
Pilatus PC-7/PC-7 MKII Turbo Trainer
PZL-Okecie PZL-130 TC-II Turbo-Orlik
PT6A-27 Beechcraft 99A
Beechcraft B99
Bombardier (deHavilland) DHC-6 Twin Otter Series 300
CATIC/HAIG Y-12
Embraer Bandeirante EMB-110
LET L410
Pilatus PC-6 Turbo Porter
PT6A-34 Embraer Bandeirante EMB-110
Embraer Bandeirante EMB-111
Embraer Caraja
Frakes Mallard
JetPROP DLX
Pacific Aerospace XSTOL (750XL)
Quest Kodiak
Vazar Dash 3 Turbine Otter
Viking DHC-6 Twin Otter 400
PT6A-34AG Air Tractor AT 502B
Frakes Turbo Cat Model A/B/C
Pacific Aerospace 750
PZL-Okecie PZL-106 Turbo-Kruk
Schweizer G-164B AG-Cat Turbine
Schweizer G-164D AG-Cat Turbine
Thrush 510P
PT6A-35 Blue 35
JetPROP DLX
PT6A-41 Beechcraft King Air 200/B200
Piper Cheyenne III/IIIA
PT6A-42 Beechcraft C12F
Beechcraft King Air 200/B200
Blackhawk XP42 King Air 200
StandardAero King Air 200
PT6A-42A Blackhawk XP42A Caravan Series
Piper Meridian
PT6A-52 Beechcraft King Air B200GT/250
Blackhawk XP52 King Air 200/B200
Enhanced Aero B200GTO
StandardAero King Air 200/B200
PT6A-60A Beechcraft King Air 300/350
PT6A-60AG Air Tractor AT 602
Thrush 550P
Thrush 660
PT6A-62 KA1-KT-1/KO-1
Pilatus PC-9 Turbo Trainer
PT6A-64 EADS Socata TBM 700
Socata TBM 700
PT6A-65AG Air Tractor AT 602
Air Tractor AT 802/802A/802AF/802F
Thrush 660
Thrush 710P
PT6A-65B Beechcraft 1900/1900C
Polish Aviation Factory M28 Skytruck
PT6A-66 National Aerospace Laboratories Saras
PIAGGIO Avanti P-180
PT6A-66A Ibis Aerospace Ae 270 HP
PT6A-66B PIAGGIO Avanti II
PT6A-66D EADS Socata TBM 850
Socata TBM 850
PT6A-67A Beechcraft Starship
EPIC LT
IAI HeronTP
PT6A-67AG Air Tractor AT 802/802A/802AF/802F
Thrush 710P
PT6A-67B Pilatus PC-12
PT6A-67F Air Tractor AT 802/802A/802AF/802F
PT6A-67P Pilatus PC-12NG
PT6A-67R Basler Turbo BT-67
Shorts 360 / 360-300
PT6A-68 T-6A Texan II
PT6A-68B Pilatus PC-21
PT6A-68C Embraer EMB-314 Super Tucano