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Test Flying
A collection of articles relating to phase one test flying of the Bearhawk aircraft.


Vortex Generators
Vortex Generators offer a number of incremental performance improvements with no observable change to cruise speed. Installation A number...
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Heavy Wing
When I was test flying my Bearhawk I noticed that in level flight the right aileron was reflexed slightly more than the left. It flew...
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Flow Matching Fuel Injectors
These days many pilots operate their engine "Lean of Peak" (LOP). There is plenty information about this on the internet, but essentially...
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Engine Cooling
Due largely to the Amateur built/Experimental category of the Bearhawk, there is no one standard for engine cooling. Factors affecting...
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Aileron Reflex
The designer recommends reflexing the ailerons approximately 3/8" above the trailing edge to help reduce adverse yaw. This works by...
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Weight and Balance Accuracy
This article discusses a method to level the aircraft accurately, so that the arm distances can be compared to other known measurements for
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Pitot Static Position Error
What is it ? Position error normally manifests as the ASI (airspeed indicator) reading a very low speed at high angles of attack. It is...
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Rigging the Bearhawk
Related links: Heavy Wing There's plenty written about how to build the Bearhawk, but very little about how to rig it well. Rigging it...
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Engine Failure Scenarios
I performed a number of glide approaches to simulate an engine failure, starting from downwind abeam the threshold at 1000ft agl. Then...
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Phase One - Managing Risks
Risk mitigation The Safety Note on Loss of Directional Control while Landing contains information from the NTSB database indicating a...
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