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Mine is on a Lyc IO-360 with constant speed prop. The plate is just under 12" OD and fits the 12" spinner.
Has anyone had trouble with cracks developing around the four mounting bolt holes? I think this was original from Lancair since there is a very similar photo in one of the older catalogs. It has a very large hexagonal hole in the center and the four mounting holes already drilled. Each of the mounting holes is backed up by a large rectangular aluminum doubler with four rivets each.
As you can see in the photo, these cracks are severe. Any ideas?
Tom Thibault
N4XB
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