How does a PT6A engine work?
It utilizes two counter-rotating turbines; one driving the compressor and the other driving the propeller through a reduction gearbox. The PT6A engine free turbine design allows the propeller RPM to be reduced and the propeller feathered during ground operation without shutting down the engine.
What is the purpose of the bleed hole in the torque meter cylinder?
The bleed valve reintroduces the air into the compressor inlet. The combustion chamber is made up to two parts, inner and outer.
Does a PT6A have a multi stage compressor?
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.
How much does it cost to overhaul a PT6A engine?
Overhauling your engine with this P&WCSMART offer can cost as low as $215,000 USD….Engine Applicability & Pricing (in $USD)
| Engine Model | Flat Rate Overhaul Cost | Optional CT Blades & Life Limited Parts Capped Price |
|---|---|---|
| PT6A-135/135A | 262,500 | 310,000 |
| PT6A-21 | 215,000 | 275,000 |
| PT6A-27 | 245,000 | 300,000 |
| PT6A-28 | 245,000 | 300,000 |
How much does a PT 6 cost?
PT6A Flat-Rate Overhaul Program Pricing
| Engine Model | Basic Price | Capped Price |
|---|---|---|
| PT6A-42 | $331,000 | $391,000 |
| PT6A-64 | $448,000 | |
| PT6A-112 | $282,000 | $377,000 |
| PT6A-114 | $283,000 | $337,000 |
How much does a PT6 engine cost?
PRICE*
| Applicable Models Basic | O/H Parts Capped Cost | LLP Parts Capped Cost |
| PT6A-67D Engine | US $375,000 | US $90,000 |
| PT6A-67D Gas Generator | US $225,000 | US $70,000 |
| PT6A-67D Power Section | US $180,000 | US $20,000 |
How much is a PT 6 overhaul?
Overhaul your engine for as low as $230,000 USD with the P&WCSMART Flat Rate Overhaul Program. To maximize value, we’ve capped the pricing for optional parts replacement – such as compressor-turbine (CT) blades and life limited parts (LLPs) – letting you accurately plan your maintenance costs.
What kind of engine is a PT6A engine?
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.
What does Pratt and Whitney PT6A power management system do?
Page 39 recommenDeD pt6A engine power mAnAgement The PT6A engine power management system has been designed to give the pilot control of the powerplant thrust over the entire airplane flight and ground-operating envelope. It is a simple and reliable system, which fully compliments the inherent operating flexibility of a free turbine engine.
Where is the transmission located on a PT6?
All engine driven accessories (with the exception of the propeller governor, power turbine overspeed governor and power turbine tachometer-generator) are mounted on the accessory gearbox at the rear of the engine.
What kind of turbine does a PT6A-21 use?
PT6A-21 Mechanically identical to a -27 but using reduction gears like -20 and has only one line of fuel nozzles. 550 SHP at 2200 propeller rpm. 12. PT6A-25 Mechanically identical to A-21 except for modifications required for inverted flight. Used by US Navy in T-34 trainer. 550 SHP for TO at 2200 propeller rpm. 13.