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Raisbeck Engineering Swept Blade Turbofan Propellers for King Air

Available for all 200/B200 and 90 series King Airs

 

Benefits for 200 props

  • Quieter cruise and cabin
  • Needs 1,090ft less runway
  • Premium alternate to power props
  • Stunning ramp presence

Download the brochure for the B200 Series King Air

Download the brochure for the 250 Series King Air

Benefits for 90 props

  • Stunning ramp presence
  • More thrust with less noise
  • Measurably improved FAA-certified performance
  • Affordable aluminum construction
  • Increased takeoff (10,500 lbs.) and landing (9,700 lbs.) weights
  • Great payload/fuel/range capability from shorter runways and high-hot scenarios

Why sweep the propeller blades?

The newer King Air 200s can cruise as fast as .52 Mach (MMO) at 28,000 feet. At a propeller RPM of 1800, the propeller tip Mach number is over .9 at cruise.

This same high-Mach phenomenon is also very much present during takeoff at low forward airspeeds but higher prop RPM. As an example, at 120 Knots during initial climb at 2000 RPM, the propeller tip Mach is an astonishingly high .8.

These takeoff, climb and cruise conditions are encountered on almost every King Air 200 flight, and they push the propeller blades significantly into the transonic drag rise for airfoils and unswept wings.

As a comparative example, commercial airliners and business jets typically fly around Mach .79 to .82, and some of them are pushing .90 (747) and even as high as .92 (Gulfstream 650 and Cessna Citation Ten). The wing sweep on these airplanes varies from 30 to 40 degrees. All one has to do is look at the top view of any of these aircraft to see how dramatic the sweep is (see figures above right).

Typical commercial airplane quarter-chord sweep angles are the Douglas DC-8 at 32 degrees and the Boeing 757 with 25 degrees. Boeing’s biggest sweep ever built into a Boeing commercial airplane is the 747 with 37½ degrees of quarter cord sweep which cruises over Mach .9 when pushed.

With a jet airplane, its entire wing is at the same Mach number. However, with a propeller blade, the farther out on its diameter, the higher the Mach number. Adding additional diameter to a propeller adds to its tip Mach number, which in turn adds unwanted additional transonic drag and noise. This, of course, detracts from the other desirable performance increases resulting from such an increase in diameter.

Now, air over an airfoil doesn’t know if that airfoil is part of a wing going straight through the air, or a propeller blade being whirled around in a circle by its propeller hub. The air reacts the same to increasing Mach number. Merely adding propeller diameter doesn’t necessarily add proportionate performance improvement and it can be measurably noisier because of high Mach effects at the outer parts of the blades.

Introducing blade sweep to the blades can largely overcome these drawbacks. You are never going to get rid of noise, but blade sweep does allow you to increase diameter to increase performance without paying the normal penalties.

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    Technical services staff

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    Will D. Cutter

    Regional Maintenance Sales Manager
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    Will D. Cutter
    Regional Maintenance Sales Manager
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    Will D. Cutter is the Regional Maintenance Sales Manager for Cutter Aviation Addison and San Antonio, TX locations. He is the dedicated point of contact for client ownership experience and is in charge of expediting post-sale maintenance to include managing and coordinating action plans with approved service centers.

    Will brings a valuable mix of industry knowledge to this role, particularly in the area of piston and turboprop products. Prior to joining Cutter Aviation, Will worked for Piper Aircraft, Inc. as a Marketing Analyst in their Digital Marketing division. Will gained in-depth understanding of Piper’s competitive advantages, target markets and client base while developing a new Customer Relationship Management system. Will also supported Piper’s marketing efforts through website curation and advertisement creation. Life-long exposure to the aviation industry coupled with his previous experience makes Will a remarkable addition to the Cutter Aviation team.

    Will is an FAA rated private pilot, currently pursuing his Instrument Rating and is looking forward to being certified to fly every aircraft Cutter Aviation sells. As a graduate of The University of Arizona, Will received a Bachelor of Science Degree with a concentration in Economics.

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    James Fisher

    Engine Program Sales and Client Relationship Manager
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    James Fisher
    Engine Program Sales and Client Relationship Manager
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    James Fisher is the Engine Program Sales and Client Relationship Manager for Cutter Aviation. James brings with him 25 years of solid aviation experience. Fisher began his career as an A&P mechanic and has held management positions with increasing responsibilities throughout the Aviation Industry. He held several positions in his 15 years at Pratt & Whitney Canada as an Engine Line Manager, Materials Manager, Operation Manager, and Continuous Improvement Manager for ACE (Achieving Competitive Excellence). In his last position as Director of Maintenance for N1 LLC his duties included setting up a heavy maintenance shop for the Honeywell HTF 7000, developing a Mobile Repair Team (MRT), implementing logistics, and managing the Fleet Maintenance Program for all Flexjet Aircraft in Arizona. He was also responsible for managing the operations of the repair station in West Virginia.

    James enjoys his leisure time watching or playing sports, specifically baseball.

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    Adam Parish

    Manager of Aircraft Services, PHX
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    Adam Parish
    Manager of Aircraft Services, PHX
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    Adam Parish is the Manager of Aircraft Services at Cutter Aviation Phoenix Sky Harbor. With over twenty-six years of accomplishments in avionics and maintenance sales, management, business development, STC development, avionics/maintenance installations and repair, he is an asset to the avionics team. Adam joined Cutter Aviation in 2003 with a position in Avionics Sales, and was eventually promoted to Avionics Sales Manager. He left the company in 2008 to pursue other opportunities and returned to Cutter Aviation in 2017.

    Previously, Adam was a Project Manager at Executive Aircraft Maintenance and a Director of Sales at Crownair Companies. He began his aviation career as an avionics and maintenance technician in the United States Air Force, working on heavy military refueling and transport aircraft as well as search and rescue helicopters.

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    Bruce Tanis

    Manager of Aircraft Services, SAT
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    Bruce Tanis
    Manager of Aircraft Services, SAT
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    Bruce Tanis as Manager of Aircraft Services for Cutter Aviation in San Antonio, TX. Bruce is responsible for managing all aspects of the maintenance operation including cost-effective utilization of department resources to meet or exceed service, avionics and aircraft upgrade requirements requested from Cutter Aviation’s maintenance customers.

    Bruce was raised around aviation and is the son of Peter Tanis, the inventor of the Tanis Engine Preheater. Growing up, Bruce’s family owned several FBOs and maintenance facilities where as soon as he was able to see over the engine cowling, he was helping in the shop.

    While attending school at Northwestern Bible College, Bruce worked as a line technician at Anoka County Blaine Airport. He later received an associate’s degree in Aviation Maintenance from Lake Area Technical College in South Dakota. After receiving his A&P License and becoming an IA, Bruce went on to work for several prestigious aviation companies which provided him with unparalleled experience in a wide array of airframes including Piper, King Air, Beechcraft, Honda, Hawker, TBM, Quest and Cessna aircraft as well as commercial airliners.

    Bruce has a Private Pilot License with SEL and MEL ratings. He is married and has two adult sons, who also followed in his family’s aviation path. When not working, he enjoys golf, playing music and most of all spending time with his grandkids.

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    Christopher Gradisar

    Manager of Aircraft Services, ADS
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    Christopher Gradisar
    Manager of Aircraft Services, ADS
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    Christopher Gradisar is Cutter Aviation’s Manager of Aircraft Services in Addison, Texas. Mr. Gradisar is responsible for managing all aspects of the maintenance operation including the successful implementation of maintenance work order projects and cost-effective utilization of department resources to meet or exceed the service, avionics, and aircraft upgrade requirements requested from Cutter Aviation’s maintenance customers.

    Mr. Gradisar began his career with Cutter Aviation in 2005 when he was hired as Chief Inspector for Cutter’s maintenance facility at Dallas Executive Airport. In 2012 Christopher accepted the position as Service Supervisor where he directed the day-to-day operations for the shop. He started his aviation career working as an A&P for an aircraft maintenance provider in Pueblo, CO and later moved to Dallas, TX and worked as a floor inspector with Raytheon Aircraft.

    Christopher enjoys working on home improvement projects in his spare time as well as sailing and racing his MacGregor 26S sailboat. Mr. Gradisar also enjoys spending time with his two grown children and 15-month-old granddaughter.

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