Engine Mount Torque Values

[Jeffrey Steenson]

Dear Builders,

A great moment for me today as I hung the O-320 I got from Wayne on the
conical mount. It was a relatively simple one-man job, and everything lined
up fine. I was pleased that the tail stayed down!

The MAM instructions I have don't give any torque numbers for the AN8 bolts.
Is there a trick to tightening these up properly?

It all appears rock solid, and I am pleased that I took the extra step of
installing the O'Shea plates. The side panels oil-can when I lift up on the
engine, but I think that should be easily solved with an extra length of
wing stringer for a doubler. I also plan to install angles (3/4 x 3/4 x/
1/8) under the floor from firewall to carrythough near the engine mount
brackets. The floor is certainly under load with the engine hanging.
Drumming on it with the fingers yields a new sound.

Best wishes for the new year!

Jeffrey Steenson
E714




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[Murray Cherkas]

Jeff

Your definitely getting closer,feels good. You'll be up soon.
Congrats on your engine.

Murray
REBEL 505

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Jeffrey Steenson
Sent: Monday, December 29, 2003 6:11 PM
To: murphy-rebel@dcsol.com
Subject: Engine Mount Torque Values


Dear Builders,

A great moment for me today as I hung the O-320 I got from Wayne on the
conical mount. It was a relatively simple one-man job, and everything lined
up fine. I was pleased that the tail stayed down!

The MAM instructions I have don't give any torque numbers for the AN8 bolts.
Is there a trick to tightening these up properly?

It all appears rock solid, and I am pleased that I took the extra step of
installing the O'Shea plates. The side panels oil-can when I lift up on the
engine, but I think that should be easily solved with an extra length of
wing stringer for a doubler. I also plan to install angles (3/4 x 3/4 x/
1/8) under the floor from firewall to carrythough near the engine mount
brackets. The floor is certainly under load with the engine hanging.
Drumming on it with the fingers yields a new sound.

Best wishes for the new year!

Jeffrey Steenson
E714




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[Jeffrey Steenson]

Hey, I really appreciate all the advice on this question. 50 ft lbs is a
heck of a pull, so I'll bet Wayne's field practices are right on.

Jeffrey




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[Wayne G. O'Shea]

Make those FOOT-lbs and I'll go along with you Steve! )

Torque range for a 1/2-20 bolt with standard (re-not shear) nut is 480-690
inch pounds (40 to 57.5 ft-lbs)

Cheers,
Wayne

----- Original Message -----
From: "steve whitenect" <srwhitenect@hotmail.com>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 2:47 PM
Subject: RE: Engine Mount Torque Values

Hi Jeffrey

Last valve I had for the conical mount bushings on the #8 bolts was 50

inch

pounds. Ensure the engine is supported not to put a load on the bushings
before torquing. Ideally. bolt the mount to the engine and then the mount
to the firewall.

Steve W.

From: Murray Cherkas <cherkas@shaw.ca>
Reply-To: <murphy-rebel@dcsol.com>
To: murphy-rebel@dcsol.com
Subject: RE: Engine Mount Torque Values
Date: Mon, 29 Dec 2003 19:43:45 -0700

Jeff

Your definitely getting closer,feels good. You'll be up soon.
Congrats on your engine.

Murray
REBEL 505

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Jeffrey Steenson
Sent: Monday, December 29, 2003 6:11 PM
To: murphy-rebel@dcsol.com
Subject: Engine Mount Torque Values


Dear Builders,

A great moment for me today as I hung the O-320 I got from Wayne on the
conical mount. It was a relatively simple one-man job, and everything
lined
up fine. I was pleased that the tail stayed down!

The MAM instructions I have don't give any torque numbers for the AN8
bolts.
Is there a trick to tightening these up properly?

It all appears rock solid, and I am pleased that I took the extra step of
installing the O'Shea plates. The side panels oil-can when I lift up on
the
engine, but I think that should be easily solved with an extra length of
wing stringer for a doubler. I also plan to install angles (3/4 x 3/4 x/
1/8) under the floor from firewall to carrythough near the engine mount
brackets. The floor is certainly under load with the engine hanging.
Drumming on it with the fingers yields a new sound.

Best wishes for the new year!

Jeffrey Steenson
E714

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[Drew Dalgleish]

wouldn't that be kind of hard on the rubber?

At 03:50 PM 12/30/2003 -0500, you wrote:

Make those FOOT-lbs and I'll go along with you Steve! )

Torque range for a 1/2-20 bolt with standard (re-not shear) nut is 480-690
inch pounds (40 to 57.5 ft-lbs)

Cheers,
Wayne

----- Original Message -----
From: "steve whitenect" <srwhitenect@hotmail.com>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 2:47 PM
Subject: RE: Engine Mount Torque Values

Hi Jeffrey

Last valve I had for the conical mount bushings on the #8 bolts was 50

inch

pounds. Ensure the engine is supported not to put a load on the bushings
before torquing. Ideally. bolt the mount to the engine and then the mount
to the firewall.

Steve W.

From: Murray Cherkas <cherkas@shaw.ca>
Reply-To: <murphy-rebel@dcsol.com>
To: murphy-rebel@dcsol.com
Subject: RE: Engine Mount Torque Values
Date: Mon, 29 Dec 2003 19:43:45 -0700

Jeff

Your definitely getting closer,feels good. You'll be up soon.
Congrats on your engine.

Murray
REBEL 505

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Jeffrey Steenson
Sent: Monday, December 29, 2003 6:11 PM
To: murphy-rebel@dcsol.com
Subject: Engine Mount Torque Values


Dear Builders,

A great moment for me today as I hung the O-320 I got from Wayne on the
conical mount. It was a relatively simple one-man job, and everything
lined
up fine. I was pleased that the tail stayed down!

The MAM instructions I have don't give any torque numbers for the AN8
bolts.
Is there a trick to tightening these up properly?

It all appears rock solid, and I am pleased that I took the extra step of
installing the O'Shea plates. The side panels oil-can when I lift up on
the
engine, but I think that should be easily solved with an extra length of
wing stringer for a doubler. I also plan to install angles (3/4 x 3/4 x/
1/8) under the floor from firewall to carrythough near the engine mount
brackets. The floor is certainly under load with the engine hanging.
Drumming on it with the fingers yields a new sound.

Best wishes for the new year!

Jeffrey Steenson
E714

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Drew Dalgleish




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[Wayne G. O'Shea]

Hell, I'll be honest and can't give you a true torque value. I have always
just tightened those 1/2" bolts 'till I can't turn them anymore with a
standard length wrench! In reality there is a dimension that you are
supposed to compress the rubbers to for an overall dimension between the
large washers each side of the case hole. Just no way that I was going to
let Jeffrey scratch his head with a finger tight 4.17 ft-lbs suggested by
Steve (although I suspect he left out a zero when typing 50!). Trying to
find the dimension on Supercub.org, as it was brought up a while ago for
mounting conical O-320's on the PA-18's. Problem is this dimension won't
apply to the rubbers that are supplied by MAM as they only recommend/supply
the rubbers with the steel insert.... as opposed to the standard plain
rubber ones that are generally used on a conical engine. The main reason I
see for these steel insert rubbers is that they hold the engines rear intake
tubes out off the motor mount x tube. To get these tight enough I'm pretty
sure you will see the better part of that 50 ft-lbs I was willing to go
along with!

Cheers,
Wayne

----- Original Message -----
From: "Drew Dalgleish" <drewjan@cabletv.on.ca>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 3:58 PM
Subject: Re: Engine Mount Torque Values

wouldn't that be kind of hard on the rubber?

At 03:50 PM 12/30/2003 -0500, you wrote:

Make those FOOT-lbs and I'll go along with you Steve! )

Torque range for a 1/2-20 bolt with standard (re-not shear) nut is

480-690

inch pounds (40 to 57.5 ft-lbs)

Cheers,
Wayne

----- Original Message -----
From: "steve whitenect" <srwhitenect@hotmail.com>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 2:47 PM
Subject: RE: Engine Mount Torque Values

Hi Jeffrey

Last valve I had for the conical mount bushings on the #8 bolts was 50

inch

pounds. Ensure the engine is supported not to put a load on the

bushings

before torquing. Ideally. bolt the mount to the engine and then the

mount

to the firewall.

Steve W.

the

of

on

of

x/

mount

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[Walter Klatt]

Hmmm, just checked my old firewall forward book by Tony B and you
may be right about the inch pounds, although I find it hard to
believe, too. It says 80 inch pounds for the small ones, and 40
for the large bushings (and no, I don't have this backwards).
However, these are the pure rubber ones and as Wayne says, MAM
supplies the metal capped ones, so maybe they are different. I
didn't use a torque wrench on mine either, but am sure it was a
lot more than 40 inch pounds.

Walter

-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
steve whitenect
Sent: Tuesday, December 30, 2003 8:34 PM
To: murphy-rebel@dcsol.com
Subject: Re: Engine Mount Torque Values


Hi Wayne and others

I can find the value of 50 inch pounds as soon as I
get my Tony Bingles (not
sure of the spelling) books back. Lent them to a buddy
that just received an
Elite kit. I'm sure thats where I got it from. Thats
why the suggestion of
placing the mount to the engine and then to airframe.
Don't want to get into
a pissing match with u but I'll put a dollar or two on
it that it's within
the stated inch pound range. I believe that the 50
foot pounds would either
split or deform the mounts, conical that is not
dyno's. These are the large
bolts that squeeze the bushings, right? From what I
learned, these are very
minimal torque values. I turned 50 yesterday and have
the occassional brain
fart, but I'm quite sure on this when I mounted an
o-235 to my Christavia
years ago with the same mount.

Steve W.

From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
Reply-To: <murphy-rebel@dcsol.com>
To: murphy-rebel@dcsol.com
Subject: Re: Engine Mount Torque Values
Date: Tue, 30 Dec 2003 18:23:32 -0500

Haven't found a torque value stated anywhere yet, but

here is lycomings

dimension from the face of the conical mount to the

inside face of the

rubber retaining washer, as stated by a guy on supercub.org.

Quote: "3.) I did not torque bolts from engine to

engine mount. Had to

tighten castle nuts at least until I could slip a

cotter pin in. This

seemed
to apply a lot of squeeze on rubber mounts. I looked

in my Lycoming book

today and noticed they give a dimension of 1.84"

between engine mount and

large washer which is the distance between both

mounts when assembled. I

have not checked this yet."

This dimension will be only useful for plain rubber

bushings as used on a

PA-18 and most conical mounts though, and not the

metal insert style lord

mount that Murphy recommends and ships with their

engine mount kits.

Wayne


----- Original Message -----
From: "Jeffrey Steenson" <jsteenson1@comcast.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 5:58 PM
Subject: Re: Engine Mount Torque Values

Hey, I really appreciate all the advice on this

question. 50 ft lbs is

a

heck of a pull, so I'll bet Wayne's field

practices are right on.

Jeffrey

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[Wayne G. O'Shea]

Haven't found a torque value stated anywhere yet, but here is lycomings
dimension from the face of the conical mount to the inside face of the
rubber retaining washer, as stated by a guy on supercub.org.

Quote: "3.) I did not torque bolts from engine to engine mount. Had to
tighten castle nuts at least until I could slip a cotter pin in. This seemed
to apply a lot of squeeze on rubber mounts. I looked in my Lycoming book
today and noticed they give a dimension of 1.84" between engine mount and
large washer which is the distance between both mounts when assembled. I
have not checked this yet."

This dimension will be only useful for plain rubber bushings as used on a
PA-18 and most conical mounts though, and not the metal insert style lord
mount that Murphy recommends and ships with their engine mount kits.

Wayne


----- Original Message -----
From: "Jeffrey Steenson" <jsteenson1@comcast.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 5:58 PM
Subject: Re: Engine Mount Torque Values

Hey, I really appreciate all the advice on this question. 50 ft lbs is a
heck of a pull, so I'll bet Wayne's field practices are right on.

Jeffrey

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[steve whitenect]

Hi Jeffrey

Last valve I had for the conical mount bushings on the #8 bolts was 50 inch
pounds. Ensure the engine is supported not to put a load on the bushings
before torquing. Ideally. bolt the mount to the engine and then the mount
to the firewall.

Steve W.

From: Murray Cherkas <cherkas@shaw.ca>
Reply-To: <murphy-rebel@dcsol.com>
To: murphy-rebel@dcsol.com
Subject: RE: Engine Mount Torque Values
Date: Mon, 29 Dec 2003 19:43:45 -0700

Jeff

Your definitely getting closer,feels good. You'll be up soon.
Congrats on your engine.

Murray
REBEL 505

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Jeffrey Steenson
Sent: Monday, December 29, 2003 6:11 PM
To: murphy-rebel@dcsol.com
Subject: Engine Mount Torque Values


Dear Builders,

A great moment for me today as I hung the O-320 I got from Wayne on the
conical mount. It was a relatively simple one-man job, and everything
lined
up fine. I was pleased that the tail stayed down!

The MAM instructions I have don't give any torque numbers for the AN8
bolts.
Is there a trick to tightening these up properly?

It all appears rock solid, and I am pleased that I took the extra step of
installing the O'Shea plates. The side panels oil-can when I lift up on
the
engine, but I think that should be easily solved with an extra length of
wing stringer for a doubler. I also plan to install angles (3/4 x 3/4 x/
1/8) under the floor from firewall to carrythough near the engine mount
brackets. The floor is certainly under load with the engine hanging.
Drumming on it with the fingers yields a new sound.

Best wishes for the new year!

Jeffrey Steenson
E714




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[steve whitenect]

Hi Wayne and others

I can find the value of 50 inch pounds as soon as I get my Tony Bingles (not
sure of the spelling) books back. Lent them to a buddy that just received an
Elite kit. I'm sure thats where I got it from. Thats why the suggestion of
placing the mount to the engine and then to airframe. Don't want to get into
a pissing match with u but I'll put a dollar or two on it that it's within
the stated inch pound range. I believe that the 50 foot pounds would either
split or deform the mounts, conical that is not dyno's. These are the large
bolts that squeeze the bushings, right? From what I learned, these are very
minimal torque values. I turned 50 yesterday and have the occassional brain
fart, but I'm quite sure on this when I mounted an o-235 to my Christavia
years ago with the same mount.

Steve W.

From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
Reply-To: <murphy-rebel@dcsol.com>
To: murphy-rebel@dcsol.com
Subject: Re: Engine Mount Torque Values
Date: Tue, 30 Dec 2003 18:23:32 -0500

Haven't found a torque value stated anywhere yet, but here is lycomings
dimension from the face of the conical mount to the inside face of the
rubber retaining washer, as stated by a guy on supercub.org.

Quote: "3.) I did not torque bolts from engine to engine mount. Had to
tighten castle nuts at least until I could slip a cotter pin in. This
seemed
to apply a lot of squeeze on rubber mounts. I looked in my Lycoming book
today and noticed they give a dimension of 1.84" between engine mount and
large washer which is the distance between both mounts when assembled. I
have not checked this yet."

This dimension will be only useful for plain rubber bushings as used on a
PA-18 and most conical mounts though, and not the metal insert style lord
mount that Murphy recommends and ships with their engine mount kits.

Wayne


----- Original Message -----
From: "Jeffrey Steenson" <jsteenson1@comcast.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 5:58 PM
Subject: Re: Engine Mount Torque Values

Hey, I really appreciate all the advice on this question. 50 ft lbs is

a

heck of a pull, so I'll bet Wayne's field practices are right on.

Jeffrey

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[steve whitenect]

Hi Walter
The smaller ones, 7/8 for the 0-235 and 290 use a collar on the inside of
the bushing. The 1" for the 0-320 is flush against the 1/2 " bolt. Thus
the need for the castle nuts and cotter pins. U can't properly torque the
smaller values with elastic locking nuts. Thanks, too, Walter, I won't have
to find Gilbert tomorrow and have him look up what u found.

Steve W.

From: Walter Klatt <walter.klatt@shaw.ca>
Reply-To: <murphy-rebel@dcsol.com>
To: murphy-rebel@dcsol.com
Subject: RE: Engine Mount Torque Values
Date: Tue, 30 Dec 2003 21:13:58 -0800

Hmmm, just checked my old firewall forward book by Tony B and you
may be right about the inch pounds, although I find it hard to
believe, too. It says 80 inch pounds for the small ones, and 40
for the large bushings (and no, I don't have this backwards).
However, these are the pure rubber ones and as Wayne says, MAM
supplies the metal capped ones, so maybe they are different. I
didn't use a torque wrench on mine either, but am sure it was a
lot more than 40 inch pounds.

Walter

-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
steve whitenect
Sent: Tuesday, December 30, 2003 8:34 PM
To: murphy-rebel@dcsol.com
Subject: Re: Engine Mount Torque Values


Hi Wayne and others

I can find the value of 50 inch pounds as soon as I
get my Tony Bingles (not
sure of the spelling) books back. Lent them to a buddy
that just received an
Elite kit. I'm sure thats where I got it from. Thats
why the suggestion of
placing the mount to the engine and then to airframe.
Don't want to get into
a pissing match with u but I'll put a dollar or two on
it that it's within
the stated inch pound range. I believe that the 50
foot pounds would either
split or deform the mounts, conical that is not
dyno's. These are the large
bolts that squeeze the bushings, right? From what I
learned, these are very
minimal torque values. I turned 50 yesterday and have
the occassional brain
fart, but I'm quite sure on this when I mounted an
o-235 to my Christavia
years ago with the same mount.

Steve W.

From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
Reply-To: <murphy-rebel@dcsol.com>
To: murphy-rebel@dcsol.com
Subject: Re: Engine Mount Torque Values
Date: Tue, 30 Dec 2003 18:23:32 -0500

Haven't found a torque value stated anywhere yet, but

here is lycomings

dimension from the face of the conical mount to the

inside face of the

rubber retaining washer, as stated by a guy on supercub.org.

Quote: "3.) I did not torque bolts from engine to

engine mount. Had to

tighten castle nuts at least until I could slip a

cotter pin in. This

seemed
to apply a lot of squeeze on rubber mounts. I looked

in my Lycoming book

today and noticed they give a dimension of 1.84"

between engine mount and

large washer which is the distance between both

mounts when assembled. I

have not checked this yet."

This dimension will be only useful for plain rubber

bushings as used on a

PA-18 and most conical mounts though, and not the

metal insert style lord

mount that Murphy recommends and ships with their

engine mount kits.

Wayne


----- Original Message -----
From: "Jeffrey Steenson" <jsteenson1@comcast.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 5:58 PM
Subject: Re: Engine Mount Torque Values

question. 50 ft lbs is

a

practices are right on.

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[Wayne G. O'Shea]

Okay, I concede that maybe my brain is still lost up in the fog... on top of
Mt Tremblant!! (where we were reading the trail signs via Braille over
Christmas!) Too much playing and finding muscles that I forgot I owned
(...proving to a 20 yr old son that he still couldn't beat the old man down
the mountain!) the last 10 days and my "gear selector" just may still be in
neutral!

Read my Binglis books and as Walter says it's printed there in black and
white at 40 in-lbs for Lycoming conical rubbers, but I still don't believe
that just over 3 ft-lbs is enough to make sure the rubber is compressed
enough to hold it tight to the case. If using these plain rubbers I would be
more tempted to go with Lyco's spec of 1.84" between retainer faces and
stick in the cotter pin.

Definitely I am wrong with 50 Ft-lbs on the conical rubbers and the brain
was leaning towards the dynafocal mount that you do indeed torque the bolts
to full value as you are tightening metal on metal via the internal spacer
sleeve. 7/16" bolts on these would be tightened to about 42 to 45 ft-lbs
just like an O-320-E2D's props 7/16" bolts.

As for the proper rubbers that MAM specs out for the supplied Conical mount
on the Rebel, they would take more torque to seat than the plain rubber
ones. Mine have worked well over the last 8+ years with minimal vibration
and no apparent wear/sag to date, so when I get a chance I am going to pull
the pins and put a torque wrench on them to see where my hand feel
tightening placed them and will post later.

FYI: MAM spec'd Lord Mounts are as follows:

Concial - J6230-1
Dynafocal - 94150-40

Steve, I owe you $5 bucks and an apology!

Cheers,
Wayne

----- Original Message -----
From: "steve whitenect" <srwhitenect@hotmail.com>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 11:34 PM
Subject: Re: Engine Mount Torque Values

Hi Wayne and others

I can find the value of 50 inch pounds as soon as I get my Tony Bingles

(not

sure of the spelling) books back. Lent them to a buddy that just received

an

Elite kit. I'm sure thats where I got it from. Thats why the suggestion

of

placing the mount to the engine and then to airframe. Don't want to get

into

a pissing match with u but I'll put a dollar or two on it that it's within
the stated inch pound range. I believe that the 50 foot pounds would

either

split or deform the mounts, conical that is not dyno's. These are the

large

bolts that squeeze the bushings, right? From what I learned, these are

very

minimal torque values. I turned 50 yesterday and have the occassional

brain

fart, but I'm quite sure on this when I mounted an o-235 to my Christavia
years ago with the same mount.

Steve W.

From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
Reply-To: <murphy-rebel@dcsol.com>
To: murphy-rebel@dcsol.com
Subject: Re: Engine Mount Torque Values
Date: Tue, 30 Dec 2003 18:23:32 -0500

Haven't found a torque value stated anywhere yet, but here is lycomings
dimension from the face of the conical mount to the inside face of the
rubber retaining washer, as stated by a guy on supercub.org.

Quote: "3.) I did not torque bolts from engine to engine mount. Had to
tighten castle nuts at least until I could slip a cotter pin in. This
seemed
to apply a lot of squeeze on rubber mounts. I looked in my Lycoming book
today and noticed they give a dimension of 1.84" between engine mount and
large washer which is the distance between both mounts when assembled. I
have not checked this yet."

This dimension will be only useful for plain rubber bushings as used on a
PA-18 and most conical mounts though, and not the metal insert style lord
mount that Murphy recommends and ships with their engine mount kits.

Wayne


----- Original Message -----
From: "Jeffrey Steenson" <jsteenson1@comcast.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 5:58 PM
Subject: Re: Engine Mount Torque Values

Hey, I really appreciate all the advice on this question. 50 ft lbs

is

a

heck of a pull, so I'll bet Wayne's field practices are right on.

Jeffrey

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[steve whitenect]

Hi Wayne,

No apology necessary. You and otherbuilders are an invaluable source of
information. If we can't put out an opinion or point of advise without
fear of ridicule or intimidation, then this whole thing would be useless.
As I said, no apology is necessay nor the five bucks, but a cold beer when
we first meet would be nice! Take care

Steve W.

From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
Reply-To: <murphy-rebel@dcsol.com>
To: murphy-rebel@dcsol.com
Subject: Re: Engine Mount Torque Values
Date: Wed, 31 Dec 2003 15:25:49 -0500

Okay, I concede that maybe my brain is still lost up in the fog... on top
of
Mt Tremblant!! (where we were reading the trail signs via Braille over
Christmas!) Too much playing and finding muscles that I forgot I owned
(...proving to a 20 yr old son that he still couldn't beat the old man down
the mountain!) the last 10 days and my "gear selector" just may still be in
neutral!

Read my Binglis books and as Walter says it's printed there in black and
white at 40 in-lbs for Lycoming conical rubbers, but I still don't believe
that just over 3 ft-lbs is enough to make sure the rubber is compressed
enough to hold it tight to the case. If using these plain rubbers I would
be
more tempted to go with Lyco's spec of 1.84" between retainer faces and
stick in the cotter pin.

Definitely I am wrong with 50 Ft-lbs on the conical rubbers and the brain
was leaning towards the dynafocal mount that you do indeed torque the bolts
to full value as you are tightening metal on metal via the internal spacer
sleeve. 7/16" bolts on these would be tightened to about 42 to 45 ft-lbs
just like an O-320-E2D's props 7/16" bolts.

As for the proper rubbers that MAM specs out for the supplied Conical mount
on the Rebel, they would take more torque to seat than the plain rubber
ones. Mine have worked well over the last 8+ years with minimal vibration
and no apparent wear/sag to date, so when I get a chance I am going to pull
the pins and put a torque wrench on them to see where my hand feel
tightening placed them and will post later.

FYI: MAM spec'd Lord Mounts are as follows:

Concial - J6230-1
Dynafocal - 94150-40

Steve, I owe you $5 bucks and an apology!

Cheers,
Wayne

----- Original Message -----
From: "steve whitenect" <srwhitenect@hotmail.com>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 11:34 PM
Subject: Re: Engine Mount Torque Values

Hi Wayne and others

I can find the value of 50 inch pounds as soon as I get my Tony Bingles

(not

sure of the spelling) books back. Lent them to a buddy that just

received
an

Elite kit. I'm sure thats where I got it from. Thats why the

suggestion
of

placing the mount to the engine and then to airframe. Don't want to get

into

a pissing match with u but I'll put a dollar or two on it that it's

within

the stated inch pound range. I believe that the 50 foot pounds would

either

split or deform the mounts, conical that is not dyno's. These are the

large

bolts that squeeze the bushings, right? From what I learned, these are

very

minimal torque values. I turned 50 yesterday and have the occassional

brain

fart, but I'm quite sure on this when I mounted an o-235 to my

Christavia

years ago with the same mount.

Steve W.

From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
Reply-To: <murphy-rebel@dcsol.com>
To: murphy-rebel@dcsol.com
Subject: Re: Engine Mount Torque Values
Date: Tue, 30 Dec 2003 18:23:32 -0500

Haven't found a torque value stated anywhere yet, but here is lycomings
dimension from the face of the conical mount to the inside face of the
rubber retaining washer, as stated by a guy on supercub.org.

Quote: "3.) I did not torque bolts from engine to engine mount. Had to
tighten castle nuts at least until I could slip a cotter pin in. This
seemed
to apply a lot of squeeze on rubber mounts. I looked in my Lycoming

book

today and noticed they give a dimension of 1.84" between engine mount

and

large washer which is the distance between both mounts when assembled.

I

have not checked this yet."

This dimension will be only useful for plain rubber bushings as used on

a

PA-18 and most conical mounts though, and not the metal insert style

lord

mount that Murphy recommends and ships with their engine mount kits.

Wayne


----- Original Message -----
From: "Jeffrey Steenson" <jsteenson1@comcast.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, December 30, 2003 5:58 PM
Subject: Re: Engine Mount Torque Values

is

a

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