What spinner/backplate diameter is compatible with the SJ cowl? I see 11 1/2" and 12" out there. Prop is a Felix FP.
You should, of course, verify this with Will James, but for the RV-7/7A in my case, it was the standard 13" one, same as for Van's cowl.
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H. Evan's RV-7A N17HH 240+ hours
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