June 7, 2010
By Thomas A. Horne
Finnoff Aviation of Boulder, Colo., has developed an FAA- and EASA-approved supplemental type certificate (STC) that lets Pilatus PC-12 owners install five-blade composite propellers on their airplanes.
The propeller, built by MT-Propeller of Atting, Germany, weighs 10 pounds less and has one more blade than stock PC-12 props, 1.75 inches more ground clearance, and yields performance advantages, Finnoff says. Among them are a 15-percent reduction in takeoff ground run, a 15-percent greater climb rate, a five-knot boost in cruise speed, and nearly vibration-free operations.
The new propeller’s resonance is such that the usual vibrations attending engine operations at startup, flight idle, and shutdown are greatly reduced. Noise levels are also diminished. MT-Propeller claims that cabin noise levels are cut by six to seven dB(A) and that aircraft noise level is reduced by four dB(A) compared to the standard metal propeller.
The price is $56,600, with the exchange of the original propeller. The STC includes a new hub and a newly-designed, stainless steel spinner ring to send electrical power to the blades’ ice protection boots. No engine modifications are required for installation. Current TBO is set at 2,000 hours or 72 months, whichever comes first. Target TBO is 3,000 hours.
AOPA Pilot Editor at Large Tom Horne has worked at AOPA since the early 1980s. He began flying in 1975 and has an airline transport pilot and flight instructor certificates. He’s flown everything from ultralights to Gulfstreams and ferried numerous piston airplanes across the Atlantic.
AOPA expressed concern in a meeting with town officials from East Hampton, New York, that restrictions proposed to curb airport noise “overwhelmingly” generated by transient commercial flights would unfairly burden traditional airport users.
February 27, 2015 ePilot Training Tip: Awake to a hazard
February 27, 2015 Medical reform bills add IFR; Hawaii from above
VOLUNTEER AT AN AOPA FLY-IN NEAR YOU!
SHARE YOUR PASSION. VOLUNTEER AT AN AOPA FLY-IN. CLICK TO LEARN MORE >>>
VOLUNTEER LOCALLY AT AOPA FLY-IN! CLICK TO LEARN MORE >>>
BE A PART OF THE FLY-IN VOLUNTEER CREW! CLICK TO LEARN MORE >>>