Page 11 - Volume 15 Number 10

“ ... cabin noise is reduced by up to one-third and single- engine climb (flaps retracted) is increased by 25.8% ... ”
Propeller System.” In 2014 the composite blades were developed in concert with Hartzell Propellers. Constructed of carbon fiber, the propellers have a diameter of 96 inches and save an average of 48 pounds compared with a standard, four-blade propeller installation. Raisbeck claims cabin noise is reduced by up to one-third and single-engine climb (flaps retracted) is increased by 25.8% compared to the OEM four-blade propeller installation. Composite propellers for the Model 350 are 106 inches in diameter and save an average of 54 pounds compared to the standard propeller.
As of May 2021, Raisbeck Engineering had sold 1,686 shipsets of the swept-blade propellers, including 1,276 sets of aluminum and 410 sets of the composite version. Of these, 589 have been installed on 90-series Kings Airs, 83 on the Model 100, 1,043 on the 200-series King Air and 63 on the Model 300. The blades were standard equipment on Textron Aviation’s Beechcraft King Air C90GTX.
OCTOBER 2021
KING AIR MAGAZINE • 9