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PT6 Derivatives
Any engine as successful and established as Pratt's PT6 will have numerous
variants; in this case, there are a number of said variants that have
become turboshaft engines for helicopters instead of turboprops for planes.
The PT6T is a twin, with two core engines powering one drive shaft.
Engine statistics
| Specification |
PT6B-36B |
PT6T-6B |
| Application |
Sikorsky S-76B |
Agusta Bell 412 |
| T/O Power |
981 shp |
1970 shp |
| T/O SFC |
0.581 |
0.592 |
| Cruise Power |
|
|
| Cruise SFC |
|
|
| Max pwr. pressure ratio |
7.1 |
|
| Length (in) |
59.2 |
65.8 |
| Dia (in) |
19.5 |
32.6 |
| Weight |
378 lb |
665 lb |