March 16/ 2016: Piper Adds Hartzell Five-Blade Prop
NEW: Hartzell's popular five-blade carbon-fiber composite propeller now is available for Piper's Meridian and M500 single-engine pressurized turboprops, the companies announced last week.
The new propeller offers a number of improvements, including:
- Flyover noise: 1.9 dB(A) quieter
- Cruise speed: 2 to 3 knots faster
- Climb: 90 feet/minute greater at Vy
- Takeoff ground roll: 20 % greater acceleration
- 15 pounds lighter than the 4-blade Hartzell metal prop w/ metal blades (and 10 pounds lighter than the wood core prop)
The blades of the new propeller are certified for unlimited life and are 5 to 10 times stronger than wood core blades. They feature a stainless steel shank, nickel cobalt leading edge and mesh erosion screen for FOD protection.
The propeller, first introduced in 2013, is also available on Socata's TBM turboprop and the Pilatus PC-12. Both the aerodynamic design and the high-strength materials drive the prop’s performance. Through optimized aerodynamic design, the low-end performance is coupled with improved cruise performance. The larger surface area and blockage effect of five-blade propellers provide quicker descents resulting in smoother touchdowns with less float.
All the mentioned improvements are vs. the standard 4-blade Hartzell prop with metal blades.
The propeller is currently approved under the FAA. However, Hartzell is actively seeking approval with several aviation authorities outside of the United States.