What are the two primary engines on ATR twin-turboprop aircraft and what family do they belong to?

What are the two primary engines on ATR twin-turboprop aircraft and what family do they belong to?

• A. Two turboprop engines from the PW100 family drive the propellers.
• B. Two turbofan engines from the PW100 family drive the propellers.
• C. One turboprop engine from the PW100 family drives the propellers.
• D. Two turboprop engines from the PW300 family drive the propellers.

Answer: (A)

The ATR twin-turboprop uses two turboprop engines from the PW100 family to power its propellers. On most ATRs, the engines are the PW127M, which drive the propellers through a reduction gearbox designed for propulsive efficiency at regional flight speeds. The PW100 family is specifically built for turboprop propulsion, offering good fuel efficiency and performance for short- to medium-range routes. The PW300 family, by contrast, is a turbofan line used on jets, not on ATR turboprops, so it wouldn’t power this aircraft. Having two engines provides the necessary redundancy for safe, reliable operation on regional flights.

The ATR twin-turboprop uses two turboprop engines from the PW100 family to power its propellers. On most ATRs, the engines are the PW127M, which drive the propellers through a reduction gearbox designed for propulsive efficiency at regional flight speeds. The PW100 family is specifically built for turboprop propulsion, offering good fuel efficiency and performance for short- to medium-range routes. The PW300 family, by contrast, is a turbofan line used on jets, not on ATR turboprops, so it wouldn’t power this aircraft. Having two engines provides the necessary redundancy for safe, reliable operation on regional flights.