11AC Spinner & Spacer Installation

Props, Spinners and McDowell Starter issues.
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Chief Pilot
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11AC Spinner & Spacer Installation

Post by Chief Pilot » Fri Jun 03, 2011 00:58

Hi,
I'm finally getting around to installing a Bob Carr spinner on my Chief. (Getting that adapter off the crankshaft was something else!) The nose bowl is applicable to the McDowell starter, but the starter is not installed. So I understand that in order to get adequate clearance between the prop/spinner and the cowl I need to install a 1/2" spacer between the taper shaft adapter flange and the propeller. My concern is this: the spacer - along with the deep chamfer in the propeller bore - allows the adapter boss to extend less than 1/8" inch into the prop hub bore.

Am I missing something? It seems to me that you would want to maximize the contact area in this area. No? Is the only purpose of the contact area between the prop bore and the adapter boss to keep the the prop centered until the retaining bolts are tightened? :?:

Advice is appreciated; thank you,
Raleigh (Seattle WA)

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