Hartzell Propeller and Raisbeck Engineering have partnered to create a supplemental type certificate for a swept five-blade composite propeller. The propeller has a 105-inch diameter and the mod improves takeoff and climb performance while significantly reducing the noise footprint. The composite prop has an unlimited blade life with a TBO of 4,000 hours or six years. The STC is expected to be available soon and the price, which has not yet been finalized, is expected to stay below $140,000 for the two props, said Raisbeck’s vice president of sales and marketing, Lynn Thomas. Once the STC is complete, the new propeller will be available through Raisbeck’s and Hartzell’s dealer networks.