PW121

PW121 is a turboprop engine manufactured by Pratt & Whitney Canada, a subsidiary of Pratt & Whitney. It is part of the PW100 family of engines, known for their reliability and fuel efficiency. The PW121 is a derivative of the earlier PW120, offering increased power output. It typically features a two-spool design with a two-stage gas generator turbine and a four-stage power turbine. The engine is equipped with a full-authority digital engine control (FADEC) system for optimal performance and monitoring.

The PW121 is commonly used to power regional airliners and utility aircraft. Its power rating generally falls in the range of 1,800 to 2,000 shaft horsepower, making it suitable for aircraft in the light to medium-sized category. Applications for the PW121 include aircraft like the Embraer EMB 120 Brasilia, ATR 42, and various military and special mission aircraft. The engine's design emphasizes durability and ease of maintenance, contributing to its widespread adoption in commercial aviation. Pratt & Whitney Canada's extensive support network also plays a role in the engine's operational success.