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Old November 4th 19, 06:23 PM posted to rec.aviation.soaring
Bob Kuykendall
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Default GLIDING INTERNATIONAL -- RESEARCH

On Sunday, November 3, 2019 at 11:26:11 AM UTC-8, Mike C wrote:

I thought that electric systems were very dependable.


In the Kawa case under discussion, it appears that the motor control system would not energize the motor because it did not detect that the mast was fully deployed. The culprit appears to be either the mast extension system which did not fully extend the mast, or the limit switch which did not properly detect that the mast was fully extended.

Either way, it is a reminder that the more complicated your system is, the more potential points of failure it embodies.

--Bob K.