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Basics of Turboprop Engines
Descriptions of various Turboprops
Comparison Tables
A turboprop engine bears a functional similarity to a turbofan, in that the shaft of the engine is used to drive another system. The other system is in this case a gearbox and a propeller, rather than a ducted fan. The core engine is designed much more in focus on creating torque, rather than providing thrust. The core should account for less than 10% of the engine's total thrust.
A turboshaft engine is similar in concept, but instead of the propeller, the gearbox exits to some other device. The most common use is to power a helicopter rotor.
TPE331 family
Allison Engines
AE 2100
T56 family
General Electric
CT7 family
Pratt & Whitney Canada
PT6A family
PW100 family
LTS101 family
T53 family
Allison Engines
Model 250 family
Light Helicopter Turbine Engine Company
T800
Pratt & Whitney Canada
PT6 Derivatives
PW200
| Make | Model | Application | Horsepower (T/O | Cruise) | SFC (T/O | Cruise) | Pressure Ratio | Length x Diameter (in) | Weight (lb) |
|---|---|---|---|---|---|---|---|
| Allied Signal | TPE331-8 | Cessna Conquest | 755 | ?? | 0.568 | ?? | 10.3 | 43 x 26 | 370 |
| Allison Engines | AE2100 | C-130J | 6000 | ?? | ||||
| T56-A-14 | P-3C Orion | 4591 | ?? | 0.54 | ?? | 9.6 | 146.3 x 49 | 1890 | |
| GE | CT7-7A | CASA/IPTN CN235 | 1700 | 1312 | 0.474 | 0.429 | 17 | 96 x 29 | 783 |
| Pratt CA | PT6A-135B | Too may to list! | 750 | ?? | 0.659 | ?? | 7 | 63 x 19 | 346 |
| PW124B | ATR 72 | 2400 | ?? | 0.468 | ?? | 13.9 | 84 x 25 | 1060 |
| Make | Model | Application | Horsepower (T/O | Cruise) | SFC (T/O | Cruise) | Pressure Ratio | Length x Diameter (in) | Weight (lb) |
|---|---|---|---|---|---|---|---|
| Allied Signal | LTS101-600A-3 | Eurocopter AS 350D | 615 | ?? | 0.58 | ?? | 8.4 | 31 x 21 | 253 |
| T53-L-703 | Bell AH-1S Cobra | 1800 | ?? | 0.568 | ?? | 8 | 47.6 x 23 | 545 | |
| Allison | 250-C30M | AS 350G | 650 | 600 | 0.59 | ?? | 8.6 | 43.2 x 25.7 | 250 |
| LHTEC | T800-LHT-801 | RAH-66 Comanche | 1563 | ?? | 0.46 | ?? | 14.1 | 31.5 x 26.8 | 330 |
| Pratt Canada | PT6B-36B | Sikorsky S-76B | 981 | ?? | 0.581 | ?? | 7.1 | 59.2 x 19.5 | 378 |
| PW206D | Bell 427 | 611 | ?? | 0.541 | ?? | 8 | 35.9 x 22.3 | ~240 |