Hartzell’s 5-Blade Swept Prop Gets OK from FAA and EASA, Increases TBM Performance
Hartzell Propeller Inc. has received type certificate approval from the Federal Aviation Administration and European Aviation Safety Agency for an advanced swept airfoil structural composite five-blade propeller for TBM 700/850 aircraft.
The new design, specifically engineered for the single-engine TBM turboprop, delivers faster takeoff acceleration, higher cruise speeds and better climb, along with less noise.
“The stronger structural composite construction of these advanced carbon fiber blades and their sophisticated aerodynamic design boosts the TBM’s already-impressive performance to a higher level,” said Hartzell President Joe Brown.
“We just finished flying cross country from Ohio to the Pacific Northwest in our TBM 700 with the new five-blade prop, and the added quickness and speed is striking, and its ramp presence is stunning.”
Higher Performance and a Quieter Cabin
With the new Hartzell propeller, the takeoff acceleration from zero to 90 knots is 10 percent faster than with any other available propeller. Hartzell’s new propeller also provides for a 100-feet-per-minute faster climb rate. Cruise is 2 knots faster than the current four-blade prop, and a full 5 knots faster than the five-blade wood-based propeller option. The new Hartzell five-blade prop is also significantly quieter in the cabin and in the pattern.
Hartzell began taking orders for the new TBM five-blade prop at the TBM Owners and Pilots Association Convention held this past month in Coeur d’Alene, Idaho. The initial response to the new TBM propeller was very positive, Brown said, noting that a number of TBM owners at the convention placed advance orders for the new props for delivery following supplemental type certificate approval, which is expected in the first quarter of next year.
Mike McCorkle, corporate pilot for Hartzell, said, “Our TBM 700 with the new propeller will now climb comparable to our 850 model. Coming out of Coeur d’Alene, we went straight up to 27,000 feet in only 16 and a half minutes with temperature 8 degrees above standard. That’s an average of nearly 1,500 feet per minute, and we shaved at least a couple minutes off of our normal time to climb.”
Higher Tensile Strength
Hartzell’s resin-injected carbon fiber blades have a tensile strength of 175 ksi (kilopound-force per square inch) compared to the competition’s beech wood (39 ksi) and spruce (8.7 ksi) construction. The thinner airfoil, which is possible due to carbon fiber’s greater strength, makes the improved TBM performance possible.
The new five-blade design features a state-of-the-art composite wedge retention into its stainless steel alloy shank rather than the aluminum and lag screw construction used by another manufacturer. Hartzell incorporates an innovative nickel erosion mesh and field replaceable nickel-cobalt erosion shield to prevent foreign object damage.
Hartzell offers the new prop with its industry-leading “Plus 3” warranty, which covers the propeller for a full three years or 1,000 hours, and a 3,600-hour/six-year TBO (Time Between Overhaul). The new propeller is available directly through Hartzell’s Top Prop conversion program or through DAHER-SOCATA’s distributor network.
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