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#1
February 11th 19, 01:38 PM
posted to rec.aviation.soaring
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Problem with Grob-103
Between the speedup and pitchdown, there's a growling noise.
Don't think it was the pilot. I've heard vibrating mylars, but this pitch is too low. Maybe a bi-stable one? I wonder if you could get enough 75Knot air with a garden blower in the shop. 
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