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1. 06:49 PM - Re: LycomingEngines-List Digest: 4 Msgs - 11/16/07 (capmrp)
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| Subject: | Re: LycomingEngines-List Digest: 4 Msgs - 11/16/07 |
Thanks Guys, for all of the input.
I mentioned that I have the procedure for clocking this prop. I got it from
a rep at Hartzell who participated in the test process referred to here
which was done last Spring on a HRII. They clocked the prop 60 degrees
against crank rotation so that it resides closer to 3-9 o'clock when #1
cylinder is TDC. The result was a reduction of overall vibration by 83%
between 2500 rpm down to 2200 rpm while preserving maximum top end speed vs
that of an MT 3-blade. I also spoke with two engine shops. The procedures
mentioned by you guys was repeated by both shops. The main caution is that
the bushing is square to the flange before pressing it into position and
that the pressing technique is the way to go (no tapping allowed).
Thanks again.
R/
Mike
----- Original Message -----
From: "LycomingEngines-List Digest Server"
<lycomingengines-list@matronics.com>
<lycomingengines-list-digest@matronics.com>
Sent: Saturday, November 17, 2007 1:56 AM
Subject: LycomingEngines-List Digest: 4 Msgs - 11/16/07
> *
>
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> ----------------------------------------------------------
> LycomingEngines-List Digest Archive
> ---
> Total Messages Posted Fri 11/16/07: 4
> ----------------------------------------------------------
>
>
> Today's Message Index:
> ----------------------
>
> 1. 12:15 PM - Re: LycomingEngines-List Digest: 1 Msgs - 11/15/07
(capmrp@cfu.net)
> 2. 01:53 PM - Re: Re: LycomingEngines-List Digest: 1 Msgs - 11/15/07
(Ralph E. Capen)
> 3. 02:55 PM - Re: Re: LycomingEngines-List Digest: 1 Msgs - 11/15/07
(manuel weber)
> 4. 04:05 PM - Re: Re: LycomingEngines-List Digest: 1 Msgs - 11/15/07
(frequent flyer)
>
>
> ________________________________ Message 1
_____________________________________
>
>
> Time: 12:15:15 PM PST US
> From: capmrp@cfu.net
> Subject: LycomingEngines-List: Re: LycomingEngines-List Digest: 1 Msgs -
11/15/07
>
>
> Gents,
>
> I am thinking of changing out the bushings in the prop flange on the
> crank to allow clocking the c/s 2-blade prop to cut down vibrations at
> cruise power. I have the procedure but since I have never swapped out
> the bushings, I'm wondering if anyone out there can give insight.
>
> 1. Are the bushings oversize fit?
> 2. Are the sides of the bushings textured in any way in order to grip
> the flange tighter ie: make it more difficult to remove?
> 3. Since the "special tool" for bushing removal/insall costs $1800
> does anyone know of where I can borrow one or of other tools that will
> work just as well?
>
> Any insight would be appreciated.
>
> Thanks.
> Mike
> capmrp@cfu.net
>
>
> ________________________________ Message 2
_____________________________________
>
>
> Time: 01:53:57 PM PST US
> From: "Ralph E. Capen" <recapen@earthlink.net>
> Subject: Re: LycomingEngines-List: Re: LycomingEngines-List Digest: 1
Msgs - 11/15/07
>
>
> I have actually seen a website where someone documented this process.
> Don't remember the details but it was fairly recent.
> Check some of the Matronics RV list archives......improve the value of
your donation........
>
> -----Original Message-----
> >From: capmrp@cfu.net
> >Sent: Nov 16, 2007 2:08 PM
> >To: lycomingengines-list@matronics.com
> >Subject: LycomingEngines-List: Re: LycomingEngines-List Digest: 1 Msgs -
11/15/07
> >
> >
> >Gents,
> >
> >I am thinking of changing out the bushings in the prop flange on the
> >crank to allow clocking the c/s 2-blade prop to cut down vibrations at
> >cruise power. I have the procedure but since I have never swapped out
> >the bushings, I'm wondering if anyone out there can give insight.
> >
> >1. Are the bushings oversize fit?
> >2. Are the sides of the bushings textured in any way in order to grip
> >the flange tighter ie: make it more difficult to remove?
> >3. Since the "special tool" for bushing removal/insall costs $1800
> >does anyone know of where I can borrow one or of other tools that will
> >work just as well?
> >
> >Any insight would be appreciated.
> >
> >Thanks.
> >Mike
> >capmrp@cfu.net
> >
> >
>
>
> ________________________________ Message 3
_____________________________________
>
>
> Time: 02:55:43 PM PST US
> From: manuel weber <flyinwithme99@yahoo.com>
> Subject: Re: LycomingEngines-List: Re: LycomingEngines-List Digest: 1
Msgs - 11/15/07
>
> The bushings are an "interference fit"
> The bushings are not "textured", they are held in place by the above
interference
> fit.
>
> I have removed the bushings very easily by using a piece of tubing that
just
> fits over the flange of the bushing on the back side of the crank flange,
use
> a bolt, nut and a washer placed on the front side of the bushing where the
washer
> is slightly smaller than the O.D. of the bushing, and simply using two
wrenches
> to squeeze the nut bolt combination together will force the bushing from
> the crankflange.
>
> Installation is done by using a bolt that fits the threads in the I.D.
of the
> bushing and placing an appropriate piece of tubing on the front side of
the crankflange,
> insert the bolt throught the tubing, crankflange, and screw into the
> bushing placed on the back side of the crankflange, pull the bushing into
place
> by turning the bolt. Lightly oil all surfaces to keep from galling. The
> press fit is not real tight so it should go in easily.
>
> Please be careful of what you may consider "proper clocking" of the prop
to the
> crank. Use the information from the prop manufacturer if available, or
call
> the prop manufacturer.
>
> Manuel Weber
> A&P
>
> capmrp@cfu.net wrote:
>
> Gents,
>
> I am thinking of changing out the bushings in the prop flange on the
> crank to allow clocking the c/s 2-blade prop to cut down vibrations at
> cruise power. I have the procedure but since I have never swapped out
> the bushings, I'm wondering if anyone out there can give insight.
>
> 1. Are the bushings oversize fit?
> 2. Are the sides of the bushings textured in any way in order to grip
> the flange tighter ie: make it more difficult to remove?
> 3. Since the "special tool" for bushing removal/insall costs $1800
> does anyone know of where I can borrow one or of other tools that will
> work just as well?
>
> Any insight would be appreciated.
>
> Thanks.
> Mike
> capmrp@cfu.net
>
>
> ---------------------------------
> Get easy, one-click access to your favorites. Make Yahoo! your homepage.
>
> ________________________________ Message 4
_____________________________________
>
>
> Time: 04:05:14 PM PST US
> From: frequent flyer <jdhcv@yahoo.com>
> Subject: Re: LycomingEngines-List: Re: LycomingEngines-List Digest: 1
Msgs - 11/15/07
>
> It's pretty easy. Put a socket on the back sid that the bushing will fit
through
> and use a c-clamp to push the bushing out. Hope this helps.
>
> Jack
>
> capmrp@cfu.net wrote:
>
> Gents,
>
> I am thinking of changing out the bushings in the prop flange on the
> crank to allow clocking the c/s 2-blade prop to cut down vibrations at
> cruise power. I have the procedure but since I have never swapped out
> the bushings, I'm wondering if anyone out there can give insight.
>
> 1. Are the bushings oversize fit?
> 2. Are the sides of the bushings textured in any way in order to grip
> the flange tighter ie: make it more difficult to remove?
> 3. Since the "special tool" for bushing removal/insall costs $1800
> does anyone know of where I can borrow one or of other tools that will
> work just as well?
>
> Any insight would be appreciated.
>
> Thanks.
> Mike
> capmrp@cfu.net
>
>
> ---------------------------------
> Never miss a thing. Make Yahoo your homepage.
>
>
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