Raisbeck Engineering has received a supplemental type certificate (number SA02559SE) by the Federal Aviation Administration, approving the installation of Raisbeck/Hartzell five blade swept turbofan propellers on heavyweight (16,500 lb) King Air 300, 350 and 360 series aircraft.

The Raisbeck/Hartzell five blade swept turbofan propellers offer a significant enhancement to aircraft performance, including increased thrust and cruise speeds, decreased noise levels and improved landing deceleration and accelerate stop. With carbon fibre composite construction and nickel cobalt leading edges, these Raisbeck/Hartzell Propellers provide unlimited blade life while weighing 54 lbs less than the OEM propeller.

"We are thrilled to have received STC approval from the FAA for our revolutionary propeller design," says Hal Chrisman, president of Raisbeck Engineering. "Our team has worked tirelessly to extend the benefits offered by our five-blade composite propellers to operators in diverse roles requiring heavyweight aircraft such as air ambulance and ISR. These props are quieter and lighter, improve performance, last forever, and they look awesome on the ramp. I am confident it will be a winner for both our customers and Raisbeck."

Raisbeck Engineering has been producing durable, five-blade composite props for 15,000 lb King Air 300 series aircraft since 2017, and this new STC is applicable to the Beechcraft King Air B300, B300C (MC-12W) and B300C models. The five-blade composite props are now available for purchase and installation through authorised dealerships worldwide.