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When I built my 320 I had heard of several people having spinner back plate
cracking problems. It was obvious that having no bracing near the front of
the spinner was an issue so I created a "donut" out of ½" foam with 2-bid on
either side. The donut was fit to the prop hub with a micro release and
then bonded with micro and 2-bid to the inside of the spinner. To make the
fit a little more snug on the prop hub I put a thin layer of RTV on the
inside of the donut. For photos of this setup check out:
http://w1.lancair.net/pix/olsen-construction. This setup has been working
with no cracks for about 240 hours now.
Dan Olsen
LNC2 - N320DK
Fort Collins, CO
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