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Raisbeck Engineering Receives STC for King Air 350 Hartzell Composite Props

Date: September 26, 2017 Category: Press Releases
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Piqua, Ohio, Sept. 26, 2017 Raisbeck Engineering has received a Supplemental Type Certificate from the FAA for Hartzell Propeller’s newest structural composite swept blade props designed specifically for Beechcraft King Air 350 turboprops.

Hartzell Propeller will feature the propeller at Booth C7812 at the National Business Aviation Association’s Convention & Exhibition (NBAA-BACE), held Oct. 10-12, 2017, in Las Vegas, Nev. The 106-inch diameter, five -blade propeller will also be on display at Raisbeck Engineering’s NBAA-BACE Booth C11812.

Hartzell designed and manufactures the King Air 350 propellers. Raisbeck performed the flight tests for the STC and will install in the aftermarket across its dealer network. The new King Air 350 propellers are an extension of propeller blade technology advancementsĀ developed by Hartzell for the King Air 90, King Air B200 series and King Air 300 series aircraft over the past three decades.

“The new composite propellers provide strong performance gains for the aircraft, including take-off distance, time to climb, and cruise speed,” said Hartzell Propeller Executive Vice President JJ Frigge. “Importantly, the props also come with an enhanced, 3-year, 3,000 hour warranty,” he added.

“The new five-blade swept propellers replace the standard Hartzell four-blade aluminum propellers on the King Air 350 fleet,” said Raisbeck Engineering Vice President of Sales and Marketing Lynn Thomas. “This provides nearly 50 lbs. of weight savings for the aircraft, improved single-engine climb performance, unlimited life blades, increased takeoff acceleration, and is quieter.”

The five-blade technology, designed specifically for the King Air 350, greatly increases the utility of the world’s most popular twin-engine turboprop. By taking advantage of the aerodynamic effect of blade sweep, the strength of lightweight structural composites and robotic manufacturing technologies, performance is optimized in all flight phases.

About Raisbeck Engineering:

Raisbeck Engineering, headquartered in Seattle, Wash., is a leading provider of aircraft modifications for business and commercial aircraft. Dedicated to improving performance and efficiency for aircraft owners, Raisbeck’s aerodynamically designed enhancements deliver better performance results and improve passenger comfort. For more information about Raisbeck Engineering and our products, please visit Stay connected with Raisbeck online through Facebook, Twitter and LinkedIn accounts.

100th Year in Business

Celebrating its 100th year, Hartzell Propeller is the global leader in advanced technology aircraft propeller design and manufacturing for business, commercial and government customers. The company designs next generation propellers with innovative “blended airfoil” technology and manufactures them with revolutionary machining centers, robotics and custom resin transfer molding curing stations.

With ASC-IIā„¢ composite technology, Hartzell delivers optimal performance, strength, and durability with carbon fiber blades. Hartzell Propeller and its sister company, Hartzell Engine Technologies LLC, form the general aviation business unit of Tailwind Technologies Inc. For more info on Hartzell Propeller go to

Hartzell Propeller