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Spinner blade clearance

 
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Lew Gallagher



Joined: 04 Jan 2008
Posts: 402
Location: Greenville , SC

PostPosted: Thu Sep 11, 2008 5:34 am    Post subject: Spinner blade clearance Reply with quote

Well, I'm sitting here on vacation at the outer banks (surf fish on Ocracoke Is. every Sept. for the past 45 yrs. -- was here on 9/11/01 also) ... and I'm building the -10 in my mind. Go figgur!

The Hartzell prop came in right before I left and we temporarily mounted it in order to fit the cowl and spinner. As I recall, the instructions say to make sure the cut outs in the spinner for the blades have enough clearance through the pitch cycle ...?????

It may be obvious (since I searched the archives and found no one else seems to have this problem), but how do you rotate the blades through their pitch manually?
Later, - Lew
(keeping an eye out for hurricanes and eating lots of fresh Bluefish -- there IS a landing strip out here, send me an email and I'll meet you there!)


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NOW OFICIALLY BUILDER #40549
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rene(at)felker.com
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PostPosted: Thu Sep 11, 2008 6:06 am    Post subject: Spinner blade clearance Reply with quote

I clamped padded boards to the blades and then used the boards as a lever.
I think the boards were only two feet or so. Gives you enough of a lever to
move them. Sorry no pictures.

Rene' Felker
RV-10 N423CF Flying
801-721-6080
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Kellym



Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

PostPosted: Thu Sep 11, 2008 6:31 am    Post subject: Spinner blade clearance Reply with quote

Why would you need to rotate the blades? Seems you could just measure
widest spot on the blades at the root and ensure your opening is
circular with a diameter of that widest spot plus 2 times the clearance
value you want. Or am I missing something?

Rene Felker wrote:
[quote]

I clamped padded boards to the blades and then used the boards as a lever.
I think the boards were only two feet or so. Gives you enough of a lever to
move them. Sorry no pictures.

Rene' Felker
RV-10 N423CF Flying
801-721-6080
--


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Kelly McMullen
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PostPosted: Thu Sep 11, 2008 6:37 am    Post subject: Spinner blade clearance Reply with quote

You can twist it by hand, but using a couple of 2x4's with a 1x?
spacer (as Rene mentioned) with a rag or foam padding makes it a
little easier if you are doing it by yourself.

Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694

On Sep 11, 2008, at 9:34 AM, Lew Gallagher wrote:

Quote:


Well, I'm sitting here on vacation at the outer banks (surf fish on
Ocracoke Is. every Sept. for the past 45 yrs. -- was here on
9/11/01 also) ... and I'm building the -10 in my mind. Go figgur!

The Hartzell prop came in right before I left and we temporarily
mounted it in order to fit the cowl and spinner. As I recall, the
instructions say to make sure the cut outs in the spinner for the
blades have enough clearance through the pitch cycle ...?????

It may be obvious (since I searched the archives and found no one
else seems to have this problem), but how do you rotate the blades
through their pitch manually?
Later, - Lew
(keeping an eye out for hurricanes and eating lots of fresh
Bluefish -- there IS a landing strip out here, send me an email and
I'll meet you there!)

--------
non-pilot
crazy about building
NOW OFICIALLY BUILDER #40549
Engine and FF here, now cowl and baffels,waiting on prop.


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rene(at)felker.com
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PostPosted: Thu Sep 11, 2008 7:47 am    Post subject: Spinner blade clearance Reply with quote

Been a while since I did it. But.....the blades only rotate part way
(degrees of pitch) and you do not end up with a circular hole. You could
just cut the hole to fit worst case blade movement, but then you would end
up with a larger gap than needed........might slow you down by .000000001
MPH.....Smile

Rene' Felker
RV-10 N423CF Flying
801-721-6080

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