FAA approves Duke strakes

Vortex-generator specialist Boundary Layer Research has obtained a US Federal Aviation Administration supplemental type-certificate for fitting a pair of aft-body strakes to Beech Duke models 60, A60 and B60. The two 1.6m-long strakes, weighing a total of 3.4kg, are riveted to the underside of the aft fuselage. They are claimed ...

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