Pratt & Whitney Canada PT6T - Variants

Variants

PT6T-3

Basic production model

PT6T-3A

Same as the PT6T-3 but with aluminum (instead of magnesium) gearbox casting, No longer used.

PT6T-3B

Same as the PT6T-3, except for the single power section contingency ratings and has PT6T-6 compressor turbine components.

PT6T-3BE

Same as the PT6T-3B with the removal of the torque sharing function in the torque control and is a PT6T-3BE gearbox fitted with two PT6T-3B power sections.

PT6T-3BF

Similar to the PT6T-3B, except 30-minute one engine inoperative (OEI) rating is equivalent to the 2½ minute OEI rating.

PT6T-3BG

Similar to the PT6T-3BE, except 30 minute OEI rating is equivalent to the 2½ minute OEI rating.

PT6T-3D

Same as the PT6T-3B, except for improved hot section hardware to allow for increased ratings.

PT6T-3DE

Same as the PT6T-3D, except the continuous OEI rating is replaced by a 30 minutes rating.

PT6T-3DF

Same as the PT6T-3DE, except for improved hot section hardware to allow for increased ratings.

PT6T-6

Same as the PT6T-3, except for the 2½ min rating and higher ratings and improved engine parts.

PT6T-6B

Same as the PT6T-6 with the removal of the torque sharing function in the torque control and is a PT6T-6B gearbox with two PT6T-6 power sections.

PT6T-9

Similar to the PT6T-3DF, except for an improved hot section and it is equipped with an engine electronic control system.

T400-C-400

Military PT6T-3

T400-CP-401

Military variant used on the VH-1N variant of the UH-1N.

T400-WV-402

Military PT6T-6, assembled by Pratt & Whitney Engine Services, Inc. in West Virginia