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.
The FAA is working to automate a contingency plan developed on the fly when Chicago Center was taken out by arson from within Sept. 26.
AOPA has urged College Park, Maryland, to make approval of a hotel construction project near the city airport conditional on reducing the building’s height.
The North Dakota Aeronautics Commission is seeking the participation of pilots and businesses that rely on general aviation in two separate online surveys.
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 >>>