Trust Plate

[Wayne G. O'Shea]

Bruce have you actually fitted the spinner and determined you need 1/2"
spacers or reading some assembly instructions?? Unless MAM has changed the
spinner again, this shouldn't be necessary. I have fitted both versions that
I know exist. The original had a front bulkhead "cone" that had to slip
inside the bore of the E-26 to center it. Then they changed to a proper
front bulkhead that bolted on with the prop bolts. The bolt on one worked
out perfect, for position, with the Sensenich prop that is about 4" thick. I
bolted it right onto the front of the prop and I sandwiched it between the
prop and the E-26. IF using a McCauley prop I could see needing 1/2" spacers
as they are usually 3 1/2" thick, as are other Sensenich props, but not the
heavy DM prop that you would have ordered through MAM. IF your bolts come up
slightly short you can counterbore about 1/2 way through that E-26 to give
you more grip. The E-26 squash plate is very important to spread the load or
the bulkhead will be quick to crack around the prop bolts!

Wayne G. O'Shea
www.irishfield.on.ca

----- Original Message -----
From: <Legeorgen@cs.com>
To: <murphy-rebel@dcsol.com>
Sent: Friday, January 18, 2002 9:43 PM
Subject: Re: Trust Plate

I ordered a Sensenich metal prop from MAM, and they sent an E-26 thrust

plate

(or crush plate for a wood prop) with the spinner kit. Grant, at MAM, said

it

was to provide more frontal attachment area for the front bulkhead of the
spinner. I would prefer not to use the E-26 thrust plate. Does anyone see

a

problem with this?

The front bulkhead of the spinner is spaced off the front of the prop with
1/2" spacers, to make it fit up against the spinner. If I use the trust

plate

on the front side of the forward spinner bulkhead, the prop bolts will not
engage enough thread in the prop flange. I could buy larger bolts (AN&-64
instead of AN7-60) but why have the extra weight of the trust plate if not
necessary.

Bruce G 357R

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[Legeorgen]

Wayne,

The front bulkhead bolts on with the prop bolts. I do have the metal
Sensenich for an 0320 from MAM that measures 4". My front bulkhead HAD to be
spaced exactly a half inch from the prop to meet up with the spinner.

Is the 0360 prop 4 1/2" thick? Maybe MAM is using this spinner kit for both
installations now, to consolidate inventory. I recollect Grant mentioning
that I wouldn't have needed the spacers with an 0360. At any rate, the bolts
Sensenich sent out with the prop made no allowance for any spacing of a
bulkhead, or thrust plate. I believe the bolts have to have thread engagement
at least the diameter of the bolt. In this case 7/16" into the prop flange.

Bruce G 357R



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[Legeorgen]

I ordered a Sensenich metal prop from MAM, and they sent an E-26 thrust plate
(or crush plate for a wood prop) with the spinner kit. Grant, at MAM, said it
was to provide more frontal attachment area for the front bulkhead of the
spinner. I would prefer not to use the E-26 thrust plate. Does anyone see a
problem with this?

The front bulkhead of the spinner is spaced off the front of the prop with
1/2" spacers, to make it fit up against the spinner. If I use the trust plate
on the front side of the forward spinner bulkhead, the prop bolts will not
engage enough thread in the prop flange. I could buy larger bolts (AN&-64
instead of AN7-60) but why have the extra weight of the trust plate if not
necessary.

Bruce G 357R



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