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.
| 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 |
T800 : PW200 