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Firebolt nose bowl problem (Steen aero lab firebolt nose bowl)

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Skybolt67

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I don't know what to do about this. I've been working on figuring out if a spacer can be made for my McCauley constant speed prop. Three is 3 inches between the continental IO-520D engine crankshaft flange and the back plate of the spinner. Is it possible to have a spacer on a constant speed propeller? If not, I would have to redesign the firebolt nose bowl and cut it down by 3 inches!
 

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