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Old 10-09-2018, 06:18 AM   #9
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Join Date: Nov 2008
Posts: 1,202

Originally Posted by Andy Craven View Post
Thanks and fascinating. By way of further detail, attached are a couple of photos from the hub. Without a caliper, I think the dimensions are:

Hub thickness 4"
Centre bolt 2 1/2"
Bolt size 1/2"
Bolt circle 6 5/8"

Is this at all consistent with your earlier thoughts.
That bolt circle diameter eliminates the Gnome as a possibility, but Bob has already found the more likely engine.

As we frequently see, the hub has been cut out to accommodate the barometer, which is all too common and always a terrible shame with one of these very old artifacts.
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