Dual Aft Body Strakes

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Raisbeck’s Dual Aft Body Strakes – which are being hailed as “The New Standard” – not only help improve directional stability, but also aid in the improvement of pilot control, aircraft handling characteristics, ride quality for passengers, as well as climb and cruise performance. These Dual Aft Body Strakes are factory installed on all new King Air 350’s, and are a key component of Raisbeck’s highly praised EPIC package, which has been shown to increase safety and dispatch reliability, as well as economy.

It’s widely know that wing/body vortices typically disrupt airflow under the aft fuselage which, in turn, creates drag. However, this separation is eliminated with the implementation of Raisbeck’s Dual Aft Body Strakes, which work to channel the vortices and accelerate the air – which, in effect, winds up pushing the airplane through the air.

Some of the most noticeable benefits – aside from distinctive lines that they’ll most certainly add to your King Air – seen with the utilization of the Dual Aft Body Strakes are:

Improved directional stability
Improved pilot control
Improved quality of ride
Reduced drag in all flight modes
Quieter cabin and cockpit
An increase in both climb and cruise performance
A substantial reduction in minimum control airspeed
Decreased drag results
Increase dispatch reliability
Eliminate or raise yaw damper limits

These yaw-stabilization factor of the Dual Aft Body Strakes increase the yaw-damper-inop maximum altitude to over 19,000 feet meaning that, should your yaw damper happen to fail en-route, you’ll still be able to safely find your way home – even if that “way home” is over the mountains. Plus, the drag-reducing produced via the strakes increase plane stability to the point that your electronic yaw damper is no longer necessary at any altitude, and no longer a dispatch item.
In fact, Raisbeck’s Dual Aft Body Strakes are able to cut drag on the King Air’s by up to two knots by keeping the airflow attached underneath the aft fuselage.

How, exactly is this achieved? Well, as high pressure air that’s flowing underneath the fuselage comes into contact with low pressure air that’s flowing over the top of the wing, a vortex is formed at the aft wing root and runs along the fuselage. Typically, the vortex would move and separate uncontrollably around the vertical fin, causing drag. However, the Dual Aft Body Strakes are crated to capture these vortices in-between each surface, thereby tucking the flow closer to the fuselage itself. This works to relieve the issues of separation and, in turn, produces thrust.

If Raisbeck’s Dual Aft Body Strakes are something that you’re interested in having installed on your King Air, please don’t hesitate to give us a call! International Propeller in Lincoln, Nebraska, is a leading Raisbeck dealer that specializes in both local, national, and international sales and service.

source: raisbeck.com