AFTER A PARTICULARLY HARD LANDING IN 13BN, I NOTICED THAT THE FIREWALL IS
PUCKERING NEAR THE TOP MOTOR MOUNT BOLTS. I TALKED TO THE FACTORY AND THEY
ARE GOING TO SEND ME INFO ABOUT A WAY TO STRENGTHEN THIS AREA.
DOES ANYONE HAVE ANY ADVICE ABOUT THIS PROBLEM?
BILL NEWKIRK
*----------------------------------------------------*
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FIREWALL WARPING
-
Bob Patterson
FIREWALL WARPING
This sounds like the problem covered by the 'floatfix' bulletin. There
is an extra channel that must be added between the top engine mounts, on
both sides of the firewall (to cross the witches hat). Sorry you had
to find this one the hard way ...
....bobp
--------------------------------orig.----------------------------------------
At 10:44 PM 11/18/99 EST, you wrote:
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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-----------------------------------------------------------------
is an extra channel that must be added between the top engine mounts, on
both sides of the firewall (to cross the witches hat). Sorry you had
to find this one the hard way ...
....bobp
--------------------------------orig.----------------------------------------
At 10:44 PM 11/18/99 EST, you wrote:
*----------------------------------------------------*AFTER A PARTICULARLY HARD LANDING IN 13BN, I NOTICED THAT THE FIREWALL IS
PUCKERING NEAR THE TOP MOTOR MOUNT BOLTS. I TALKED TO THE FACTORY AND THEY
ARE GOING TO SEND ME INFO ABOUT A WAY TO STRENGTHEN THIS AREA.
DOES ANYONE HAVE ANY ADVICE ABOUT THIS PROBLEM?
BILL NEWKIRK
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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-----------------------------------------------------------------
-
Aurele Lavigne
FIREWALL WARPING
Bob, I should probably have a look at that bulletin if it pertains to floats
and given that I have an older rebel. Can you send me a copy.
Thanks, Aurele Lavigne
----Original Message-----
From: Bob Patterson <bob.patterson@canrem.com>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Thursday, November 18, 1999 10:51 PM
Subject: Re: FIREWALL WARPING
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
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and given that I have an older rebel. Can you send me a copy.
Thanks, Aurele Lavigne
----Original Message-----
From: Bob Patterson <bob.patterson@canrem.com>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Thursday, November 18, 1999 10:51 PM
Subject: Re: FIREWALL WARPING
--This sounds like the problem covered by the 'floatfix' bulletin. There
is an extra channel that must be added between the top engine mounts, on
both sides of the firewall (to cross the witches hat). Sorry you had
to find this one the hard way ...
....bobp
--------------------------------orig.--------------------------------------
THEYAt 10:44 PM 11/18/99 EST, you wrote:AFTER A PARTICULARLY HARD LANDING IN 13BN, I NOTICED THAT THE FIREWALL IS
PUCKERING NEAR THE TOP MOTOR MOUNT BOLTS. I TALKED TO THE FACTORY AND
*----------------------------------------------------**----------------------------------------------------*ARE GOING TO SEND ME INFO ABOUT A WAY TO STRENGTHEN THIS AREA.
DOES ANYONE HAVE ANY ADVICE ABOUT THIS PROBLEM?
BILL NEWKIRK
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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*----------------------------------------------------*
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between builders and owners of Murphy Rebel aircraft.
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-
Wayne G. O'Shea
FIREWALL WARPING
--------------------------------------------------------------------------
Your following message has been delivered to the 138 members of
the list murphy-rebel@dcsol.com at 12:28:43 on 19 Nov 1999.
--------------------------------------------------------------------------
Aurele, you most likely will not have a problem with your firewall as you
are running the 912 at less than half the weight of most O-320 lycoming set
ups. The momentum of the heavier engines wanting to continue in the down
plane after a hard landing causes the top motor mounts to pull together,
buckling the firewall. The need for firewall reinforcing has been stated by
myself for over 4 years and by others previously only to be ignored by the
powers to be! It wasn't until 2 aircraft where damaged in front of the
"world" (OSHKOSH) that the bulletin went out and unfortunately not to all
the builders! I combated this problem with .063 reinforcing plates for the
firewall, when I rebuilt a customers aircraft in 96, which join the mount
bolt area into the witches hats to significantly stiffen the firewall and
transfer the loads. I sell the set for $100cdn (3 plates - 2 triangular
plates c/w 90* brake for the top mounts and a 3rd flat plate that joins the
2 lower mount bolts together) Not sure what Murphy charges for the materials
to do the fix and both our methods have advantages and disadvantages
depending on whether your aircraft is already flying or being built. But
like I said I don't think you need it personally with the 912 and if you
decide some day to change to a lycoming or suburu you could do the
reinforcing when you have the engine off!
Wayne
-----Original Message-----
From: Aurele Lavigne <alavigne@ntl.sympatico.ca>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Friday, November 19, 1999 12:05 PM
Subject: Re: FIREWALL WARPING
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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*----------------------------------------------------*
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-----------------------------------------------------------------
Your following message has been delivered to the 138 members of
the list murphy-rebel@dcsol.com at 12:28:43 on 19 Nov 1999.
--------------------------------------------------------------------------
Aurele, you most likely will not have a problem with your firewall as you
are running the 912 at less than half the weight of most O-320 lycoming set
ups. The momentum of the heavier engines wanting to continue in the down
plane after a hard landing causes the top motor mounts to pull together,
buckling the firewall. The need for firewall reinforcing has been stated by
myself for over 4 years and by others previously only to be ignored by the
powers to be! It wasn't until 2 aircraft where damaged in front of the
"world" (OSHKOSH) that the bulletin went out and unfortunately not to all
the builders! I combated this problem with .063 reinforcing plates for the
firewall, when I rebuilt a customers aircraft in 96, which join the mount
bolt area into the witches hats to significantly stiffen the firewall and
transfer the loads. I sell the set for $100cdn (3 plates - 2 triangular
plates c/w 90* brake for the top mounts and a 3rd flat plate that joins the
2 lower mount bolts together) Not sure what Murphy charges for the materials
to do the fix and both our methods have advantages and disadvantages
depending on whether your aircraft is already flying or being built. But
like I said I don't think you need it personally with the 912 and if you
decide some day to change to a lycoming or suburu you could do the
reinforcing when you have the engine off!
Wayne
-----Original Message-----
From: Aurele Lavigne <alavigne@ntl.sympatico.ca>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Friday, November 19, 1999 12:05 PM
Subject: Re: FIREWALL WARPING
floatsBob, I should probably have a look at that bulletin if it pertains to
-and given that I have an older rebel. Can you send me a copy.
Thanks, Aurele Lavigne
----Original Message-----
From: Bob Patterson <bob.patterson@canrem.com>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Thursday, November 18, 1999 10:51 PM
Subject: Re: FIREWALL WARPING
This sounds like the problem covered by the 'floatfix' bulletin. There
is an extra channel that must be added between the top engine mounts, on
both sides of the firewall (to cross the witches hat). Sorry you had
to find this one the hard way ...
....bobp
--------------------------------orig.-------------------------------------
*----------------------------------------------------*--THEYAt 10:44 PM 11/18/99 EST, you wrote:AFTER A PARTICULARLY HARD LANDING IN 13BN, I NOTICED THAT THE FIREWALL IS
PUCKERING NEAR THE TOP MOTOR MOUNT BOLTS. I TALKED TO THE FACTORY AND*----------------------------------------------------**----------------------------------------------------*ARE GOING TO SEND ME INFO ABOUT A WAY TO STRENGTHEN THIS AREA.
DOES ANYONE HAVE ANY ADVICE ABOUT THIS PROBLEM?
BILL NEWKIRK
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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*----------------------------------------------------*
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-----------------------------------------------------------------
-
BILNEWKIRK
FIREWALL WARPING
WAYNE:
I READ YOUR NOTE ABOUT THE FIREWALL REPAIR. WHICH ONE WOULD BE BEST FOR MY
ALREADY FLYING 0-290?
BILL NEWKIRK
*----------------------------------------------------*
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I READ YOUR NOTE ABOUT THE FIREWALL REPAIR. WHICH ONE WOULD BE BEST FOR MY
ALREADY FLYING 0-290?
BILL NEWKIRK
*----------------------------------------------------*
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between builders and owners of Murphy Rebel aircraft.
Archives located at:
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-----------------------------------------------------------------
-
Aurele Lavigne
FIREWALL WARPING
Thanks for the info Wayne. By the way, I looked at the strobe kits by Great
Plains that Bop Patterson suggested and then looked at Aeroflash site for
lenses and mounts, but I have no idea what to look for and they have tons of
stuff.
Bob if you can help once again!!!
Many thanks, Bob, Wayne etc.
Aurele
-----Original Message-----
From: Wayne G. O'Shea <oifa@irishfield.on.ca>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Friday, November 19, 1999 12:28 PM
Subject: Re: FIREWALL WARPING
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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*----------------------------------------------------*
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-----------------------------------------------------------------
Plains that Bop Patterson suggested and then looked at Aeroflash site for
lenses and mounts, but I have no idea what to look for and they have tons of
stuff.
Bob if you can help once again!!!
Many thanks, Bob, Wayne etc.
Aurele
-----Original Message-----
From: Wayne G. O'Shea <oifa@irishfield.on.ca>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Friday, November 19, 1999 12:28 PM
Subject: Re: FIREWALL WARPING
theAurele, you most likely will not have a problem with your firewall as you
are running the 912 at less than half the weight of most O-320 lycoming set
ups. The momentum of the heavier engines wanting to continue in the down
plane after a hard landing causes the top motor mounts to pull together,
buckling the firewall. The need for firewall reinforcing has been stated by
myself for over 4 years and by others previously only to be ignored by the
powers to be! It wasn't until 2 aircraft where damaged in front of the
"world" (OSHKOSH) that the bulletin went out and unfortunately not to all
the builders! I combated this problem with .063 reinforcing plates for the
firewall, when I rebuilt a customers aircraft in 96, which join the mount
bolt area into the witches hats to significantly stiffen the firewall and
transfer the loads. I sell the set for $100cdn (3 plates - 2 triangular
plates c/w 90* brake for the top mounts and a 3rd flat plate that joins
materials2 lower mount bolts together) Not sure what Murphy charges for the
-to do the fix and both our methods have advantages and disadvantages
depending on whether your aircraft is already flying or being built. But
like I said I don't think you need it personally with the 912 and if you
decide some day to change to a lycoming or suburu you could do the
reinforcing when you have the engine off!
Wayne
-----Original Message-----
From: Aurele Lavigne <alavigne@ntl.sympatico.ca>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Friday, November 19, 1999 12:05 PM
Subject: Re: FIREWALL WARPING
floatsBob, I should probably have a look at that bulletin if it pertains toand given that I have an older rebel. Can you send me a copy.
Thanks, Aurele Lavigne
----Original Message-----
From: Bob Patterson <bob.patterson@canrem.com>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Thursday, November 18, 1999 10:51 PM
Subject: Re: FIREWALL WARPING
This sounds like the problem covered by the 'floatfix' bulletin. There
is an extra channel that must be added between the top engine mounts, on
both sides of the firewall (to cross the witches hat). Sorry you had
to find this one the hard way ...
....bobp
--------------------------------orig.------------------------------------
IS---At 10:44 PM 11/18/99 EST, you wrote:
*----------------------------------------------------**----------------------------------------------------*THEY*----------------------------------------------------**----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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*----------------------------------------------------*
-----------------------------------------------------------------
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-----------------------------------------------------------------
-
Wayne G. O'Shea
FIREWALL WARPING
--------------------------------------------------------------------------
Your following message has been delivered to the 138 members of
the list murphy-rebel@dcsol.com at 16:41:15 on 19 Nov 1999.
--------------------------------------------------------------------------
Bill (and all), I could do the "well of course my way is the best" but that
is not the way I operate! Depending on how puckered your firewall is, you
may have to force things back in place before you fix.(a heavy duty
turnbuckle has been used before to expand the distance) Murphy's fix is to
put a piece of channel(.032 ST28 I believe) across between the two upper
mounts and you must do a long length on one side and a short overlapped
length on the other to clear the witches hat and as far as I know removal of
the mount bolts is not required. If you have no electrical wires, control
push pulls or tach cables in this area it may be the easier route, although
I question the fact that it doesn't actually go under the mount bolts(as far
as I know) This leaves a small area that could still compress. My plates
require the unbolting of the engine mount from the firewall. The top ones
can be done one at a time if you don't have access to a hoist or block and
tackle to hold the engine up. With your O-290 being a Conical mount (it is
isn't it) you already have a tube going between the lower mount bolts so the
lower plate isn't absolutely necessary and it is very hard to install with
the engine already in place. (The dynafocal mount has no cross tube
here.)You would however have to put one penny washer under each lower mount
flange to bring it out even with the new .063 top plates to keep the proper
thrust line. I have no problem telling people how to make the triangular top
plates, etc. as I only charge $100cdn for them and if you don't buy aluminum
in full sheets, you will pretty well pay this for the small amount that you
need! If you have access to some .063 6061-T6 you can make your own as
follows.(do them in poster cardboard first!)The top plates are made to fit
from the top corner at the witches hat, hugging the the curve and slant of
the firewalls outer edge down about 8 1/2" and then straight across to the
witches hat again. The lower edge going across has a 1/2" brake in it to add
rigidity.(don't have a brake use some .063 angle and 1" rivet spacing) The
plate overlaps up onto the witches hat(w.h.) so you can use the same holes
and rivets to attach it and sandwich it together with the firewall and w.h.
Also rivet spacing at about 1 1/4" in rows on plate and 1" around outer edge
of firewall to securely attach. Also need to drill a hole out to match mount
bolt location in the plate and then, deburr, chromate and rivet with what
ever rivets you used in your firewall. Then re-install your mount bolt, with
one less washer that before. 2 years of pounding on Customers Amphib now and
it still looks like new! If you wanted to do a lower plate it is the same
idea except it is one plate all the way across bottom. Lower plate has what
looks like 2 mountain peaks at each end that follow up the w.h. to a height
of about 7" from the lower firewall lip and then come back down at the same
angle to blend straight across approx. 4" up from lower lip. Same 11/4"
rivet spacing throughout plate and use the existing holes in witches hats as
you do with the top plates.
I noticed in an original promo shot of the Elite that the motor mount
"beefing" plates where very local and did not tie into the w.h. Anyone that
is building an Elite would be well advised to expand these plates to pick up
the w.h. for the added strength.(as you know, people are finding out it
would have been easier to do while building it)
Another spot to add a little strength is on the top motor mount "bath tub"
fittings. On the .032 doubler that is under each upper mount fitting(or on
the outside if you did it by the manual and didn't hide it), drill out the
lower edge rivets, along with one rivet in the witches hat on the side panel
that is directly in line with the rivets you just drilled out. Cut a piece
of wing stringer (or bend one up to similar shape) to fit from the firewall
to overlapping the side panels witches hat. Mark a center line on the
stringer piece and back drill through the existing holes in the doubler and
the one in the witches hat, plus one or two new ones in between. Rivet
stringer in place (after D.B. and Chromate).
I presume you already have "my" double row of rivets up the door post!!??
Centered between each existing rivet, you should have another one staggered
forward about 3/16ths of an inch and make the top one a well
dipped(chromate) 3/16 S.S. one! How about the extra bulkhead in the floor,
centered between the rear landing gear fitting bulkhead and the next
bulkhead forward, ST28 door sills and a sandwiched extra skin below the door
sill? This ones a "while you build only!"
Sorry it's so long, no wonder I can't seem to get those NOS parts
inventoried, but I hope I helped you (and others), Wayne
-----Original Message-----
From: BILNEWKIRK@aol.com <BILNEWKIRK@aol.com>
To: murphy-rebel@dcsol.com <murphy-rebel@dcsol.com>
Date: Friday, November 19, 1999 2:48 PM
Subject: Re: FIREWALL WARPING
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*
-----------------------------------------------------------------
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username "rebel" password "builder"
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-----------------------------------------------------------------
Your following message has been delivered to the 138 members of
the list murphy-rebel@dcsol.com at 16:41:15 on 19 Nov 1999.
--------------------------------------------------------------------------
Bill (and all), I could do the "well of course my way is the best" but that
is not the way I operate! Depending on how puckered your firewall is, you
may have to force things back in place before you fix.(a heavy duty
turnbuckle has been used before to expand the distance) Murphy's fix is to
put a piece of channel(.032 ST28 I believe) across between the two upper
mounts and you must do a long length on one side and a short overlapped
length on the other to clear the witches hat and as far as I know removal of
the mount bolts is not required. If you have no electrical wires, control
push pulls or tach cables in this area it may be the easier route, although
I question the fact that it doesn't actually go under the mount bolts(as far
as I know) This leaves a small area that could still compress. My plates
require the unbolting of the engine mount from the firewall. The top ones
can be done one at a time if you don't have access to a hoist or block and
tackle to hold the engine up. With your O-290 being a Conical mount (it is
isn't it) you already have a tube going between the lower mount bolts so the
lower plate isn't absolutely necessary and it is very hard to install with
the engine already in place. (The dynafocal mount has no cross tube
here.)You would however have to put one penny washer under each lower mount
flange to bring it out even with the new .063 top plates to keep the proper
thrust line. I have no problem telling people how to make the triangular top
plates, etc. as I only charge $100cdn for them and if you don't buy aluminum
in full sheets, you will pretty well pay this for the small amount that you
need! If you have access to some .063 6061-T6 you can make your own as
follows.(do them in poster cardboard first!)The top plates are made to fit
from the top corner at the witches hat, hugging the the curve and slant of
the firewalls outer edge down about 8 1/2" and then straight across to the
witches hat again. The lower edge going across has a 1/2" brake in it to add
rigidity.(don't have a brake use some .063 angle and 1" rivet spacing) The
plate overlaps up onto the witches hat(w.h.) so you can use the same holes
and rivets to attach it and sandwich it together with the firewall and w.h.
Also rivet spacing at about 1 1/4" in rows on plate and 1" around outer edge
of firewall to securely attach. Also need to drill a hole out to match mount
bolt location in the plate and then, deburr, chromate and rivet with what
ever rivets you used in your firewall. Then re-install your mount bolt, with
one less washer that before. 2 years of pounding on Customers Amphib now and
it still looks like new! If you wanted to do a lower plate it is the same
idea except it is one plate all the way across bottom. Lower plate has what
looks like 2 mountain peaks at each end that follow up the w.h. to a height
of about 7" from the lower firewall lip and then come back down at the same
angle to blend straight across approx. 4" up from lower lip. Same 11/4"
rivet spacing throughout plate and use the existing holes in witches hats as
you do with the top plates.
I noticed in an original promo shot of the Elite that the motor mount
"beefing" plates where very local and did not tie into the w.h. Anyone that
is building an Elite would be well advised to expand these plates to pick up
the w.h. for the added strength.(as you know, people are finding out it
would have been easier to do while building it)
Another spot to add a little strength is on the top motor mount "bath tub"
fittings. On the .032 doubler that is under each upper mount fitting(or on
the outside if you did it by the manual and didn't hide it), drill out the
lower edge rivets, along with one rivet in the witches hat on the side panel
that is directly in line with the rivets you just drilled out. Cut a piece
of wing stringer (or bend one up to similar shape) to fit from the firewall
to overlapping the side panels witches hat. Mark a center line on the
stringer piece and back drill through the existing holes in the doubler and
the one in the witches hat, plus one or two new ones in between. Rivet
stringer in place (after D.B. and Chromate).
I presume you already have "my" double row of rivets up the door post!!??
Centered between each existing rivet, you should have another one staggered
forward about 3/16ths of an inch and make the top one a well
dipped(chromate) 3/16 S.S. one! How about the extra bulkhead in the floor,
centered between the rear landing gear fitting bulkhead and the next
bulkhead forward, ST28 door sills and a sandwiched extra skin below the door
sill? This ones a "while you build only!"
Sorry it's so long, no wonder I can't seem to get those NOS parts
inventoried, but I hope I helped you (and others), Wayne
-----Original Message-----
From: BILNEWKIRK@aol.com <BILNEWKIRK@aol.com>
To: murphy-rebel@dcsol.com <murphy-rebel@dcsol.com>
Date: Friday, November 19, 1999 2:48 PM
Subject: Re: FIREWALL WARPING
*----------------------------------------------------*WAYNE:
I READ YOUR NOTE ABOUT THE FIREWALL REPAIR. WHICH ONE WOULD BE BEST FOR MY
ALREADY FLYING 0-290?
BILL NEWKIRK
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Bob Patterson
FIREWALL WARPING
It probably isn't necessary for you, as the 912 is so much lighter than
the Lycosauruses ....
I don't have a copy, but it is available on the Murphy web site, under
'bulletins', I think. (www.murphyair.com)
....bobp
-------------------------orig.-------------------------------------------
At 11:21 AM 11/19/99 -0500, you wrote:
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the Lycosauruses ....
I don't have a copy, but it is available on the Murphy web site, under
'bulletins', I think. (www.murphyair.com)
....bobp
-------------------------orig.-------------------------------------------
At 11:21 AM 11/19/99 -0500, you wrote:
*----------------------------------------------------*Bob, I should probably have a look at that bulletin if it pertains to floats
and given that I have an older rebel. Can you send me a copy.
Thanks, Aurele Lavigne
----Original Message-----
From: Bob Patterson <bob.patterson@canrem.com>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Thursday, November 18, 1999 10:51 PM
Subject: Re: FIREWALL WARPING
--This sounds like the problem covered by the 'floatfix' bulletin. There
is an extra channel that must be added between the top engine mounts, on
both sides of the firewall (to cross the witches hat). Sorry you had
to find this one the hard way ...
....bobp
--------------------------------orig.--------------------------------------THEYAt 10:44 PM 11/18/99 EST, you wrote:AFTER A PARTICULARLY HARD LANDING IN 13BN, I NOTICED THAT THE FIREWALL IS
PUCKERING NEAR THE TOP MOTOR MOUNT BOLTS. I TALKED TO THE FACTORY AND*----------------------------------------------------**----------------------------------------------------*ARE GOING TO SEND ME INFO ABOUT A WAY TO STRENGTHEN THIS AREA.
DOES ANYONE HAVE ANY ADVICE ABOUT THIS PROBLEM?
BILL NEWKIRK
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Archives located at:
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The Murphy Rebel Builders List is for the discussion
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Archives located at:
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The Murphy Rebel Builders List is for the discussion
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BILNEWKIRK
FIREWALL WARPING
Wayne:
Thanks for the info and the pictures. I downloaded the pictures but made the
mistake of trying to view them as a windows WORKS file. No bueno (Southern
Calif. Mexican lingo). I will have to consult with a computer person
tomorrow to see if we can view them.
Question: Would it be practical to attach an additional motor mount
chromemoly tube between the two top motor mount bolts - either by clamping or
welding? Would this put some weird types of stress on the mounts. Maybe you
can read between the lines that I am trying to avoid taking all that nice new
insulation and carpet off the inside of the firewall.
Bill N
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Thanks for the info and the pictures. I downloaded the pictures but made the
mistake of trying to view them as a windows WORKS file. No bueno (Southern
Calif. Mexican lingo). I will have to consult with a computer person
tomorrow to see if we can view them.
Question: Would it be practical to attach an additional motor mount
chromemoly tube between the two top motor mount bolts - either by clamping or
welding? Would this put some weird types of stress on the mounts. Maybe you
can read between the lines that I am trying to avoid taking all that nice new
insulation and carpet off the inside of the firewall.
Bill N
*----------------------------------------------------*
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between builders and owners of Murphy Rebel aircraft.
Archives located at:
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Wayne G. O'Shea
FIREWALL WARPING
--------------------------------------------------------------------------
Your following message has been delivered to the 137 members of
the list murphy-rebel@dcsol.com at 00:40:32 on 20 Nov 1999.
--------------------------------------------------------------------------
Bill, If you could put a fairly heavy walled tube across between the two top
mounts in tight like the bottom one it would likely work okay to keep the
mount from pulling in. The problem is, at the top, the witches hat is in the
way to get it in tight to the firewall. If you moved it out to clear the
w.h. you probably couldn't pull a magneto if necessary or your oil screen,
with a tube going across this area. Have a good look at your installation
and make a plan of attack from there. Wayne P.S. Tell me if
you get the pictures viewable of not!
-----Original Message-----
From: BILNEWKIRK@aol.com <BILNEWKIRK@aol.com>
To: murphy-rebel@dcsol.com <murphy-rebel@dcsol.com>
Date: Saturday, November 20, 1999 12:01 AM
Subject: Re: FIREWALL WARPING
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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*----------------------------------------------------*
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Your following message has been delivered to the 137 members of
the list murphy-rebel@dcsol.com at 00:40:32 on 20 Nov 1999.
--------------------------------------------------------------------------
Bill, If you could put a fairly heavy walled tube across between the two top
mounts in tight like the bottom one it would likely work okay to keep the
mount from pulling in. The problem is, at the top, the witches hat is in the
way to get it in tight to the firewall. If you moved it out to clear the
w.h. you probably couldn't pull a magneto if necessary or your oil screen,
with a tube going across this area. Have a good look at your installation
and make a plan of attack from there. Wayne P.S. Tell me if
you get the pictures viewable of not!
-----Original Message-----
From: BILNEWKIRK@aol.com <BILNEWKIRK@aol.com>
To: murphy-rebel@dcsol.com <murphy-rebel@dcsol.com>
Date: Saturday, November 20, 1999 12:01 AM
Subject: Re: FIREWALL WARPING
theWayne:
Thanks for the info and the pictures. I downloaded the pictures but made
ormistake of trying to view them as a windows WORKS file. No bueno (Southern
Calif. Mexican lingo). I will have to consult with a computer person
tomorrow to see if we can view them.
Question: Would it be practical to attach an additional motor mount
chromemoly tube between the two top motor mount bolts - either by clamping
youwelding? Would this put some weird types of stress on the mounts. Maybe
newcan read between the lines that I am trying to avoid taking all that nice
*----------------------------------------------------*insulation and carpet off the inside of the firewall.
Bill N
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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*----------------------------------------------------*
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Alister Yeoman
FIREWALL WARPING
Hi All,
These subjects just keep coming up dont they! Just a few observations on the firewall problems.
If you run an 0-320 the firewall area is completely underdone, you dont even need a hard landing to cause damage, just taxying over rough ground will set things moving.
If you have some movement there, be sure to check for radial cracks on the firewall around the top engine mount firewall bolts, as this starts early in the peice, I had to put 32 thou doublers under top mount brackets for repair and strenghtening. The Murphy floatfix works really well but I would be tempted to go heavier than 32 thou for the channel between the top to mount bolts.
I had to use a panelbeaters 'porta power' internal push hydrualic jack to move the top mounts back to their original position.
I found it necessary to stiffen the area on the side panels around the top engine mounts as well.
To date I have not found a weakness in the lower engine mount area.
From: Alister Yeoman
email: yeoman@voyager.co.n (yeoman@voyager.co.n)z
These subjects just keep coming up dont they! Just a few observations on the firewall problems.
If you run an 0-320 the firewall area is completely underdone, you dont even need a hard landing to cause damage, just taxying over rough ground will set things moving.
If you have some movement there, be sure to check for radial cracks on the firewall around the top engine mount firewall bolts, as this starts early in the peice, I had to put 32 thou doublers under top mount brackets for repair and strenghtening. The Murphy floatfix works really well but I would be tempted to go heavier than 32 thou for the channel between the top to mount bolts.
I had to use a panelbeaters 'porta power' internal push hydrualic jack to move the top mounts back to their original position.
I found it necessary to stiffen the area on the side panels around the top engine mounts as well.
To date I have not found a weakness in the lower engine mount area.
From: Alister Yeoman
email: yeoman@voyager.co.n (yeoman@voyager.co.n)z
