In the mid-50s, P&W decided to concentrate on turbine engines for general aviation. Their first product was the PT6A. Forty years and 34,000 engines later (not including the PT6T), the PT6A is still a leader in the corporate and general turboprop market.
Depending upon the model, the PT6A produces from 580 to 1,940 horsepower (432 - 1440 kW).

models

• PT6A-25: 400 hp (298 kW)
• PT6A-42: 850 hp (634 kW)
• PT6A-50: 1,120 hp (835 kW)
• PT6A-67D: 1,280 hp (955 kW)
• PT6A-67R: 1,424 hp (1062 kW)
• PT6A-68: 1,708 hp (1274 kW)
• PT6A-114: 600 hp (477 kW)

specifications

• Turboprop
• Compressor: three stage axial with single stage centrifugal
• Turbine: 1-stage HP and 1-stage LP for the prop
• Mass flow: 5.9 - 9.5 lbs/sec
• Pressure ratio: 6.5 - 10

used by

• Beech King Air 200
• Beech 1900
• Beech T-34C Turbo-Mentor
• Cessna 208 Caravan
• de Havilland Canada DHC-7
• Raytheon-Beech T-6 Texan II
• Shorts 360