Rebel Tail Post

[Wayne G. O'Shea]

Hello All!

Last year when doing the annual inspecton on Howards Amphib Rebel, I found all 3 RV1410 rivets sheared off, that attatch Fus 31 to the tail post. As Howards aircraft was on floats all year, this can only be attributed to torsional air loads! I checked my aircraft(on wheels) and found 2 out of 3 were sheared off! I drilled up to #11 and replaced these rivets with RV1613's. This year while putting away Howards aircraft for the winter(he goes to Florida for 6 months) I checked these rivets out to find that now the Fus 31 was starting to crack at each corner relief. I constructed a doubler to cover the portion of the Fus 31 from the tail post to the tail spring bulkhead and riveted it down around the perimeter and re-riveted the post with RV1613 rivets. I would suspect that this is happening in other aircraft and suggest that anyone that is flying pulls their tail cone covers to check(you are supposed to do this once a year you know!!!!) Those that are building, I suggest you use 1613 rivets here instead if 1410's and make sure you make sure that the reliefs are nice and smooth and free of nicks prior to installation. I think someone else asked about deburring! This is were it becomes important. Every, every, every, part should be filed clean on all edges, inside wings or out in the open. This summer I rebuilt the Pegastol Prototype after a less than perfect landing at Hare Field in Bradford. I lost count of the cuts on my arms and the lost pints of blood while working inside the wings and fuselage. Numerous corners were starting to crack on ribs etc. from not being deburred! The little extra time will make the aircraft last and if you do all the parts as you take them out of the crate during inventory, you won"t need the bandaids in the first aid kit you have screwed to the side of your work bench! You do have a first aid kit within 5 feet of your bench don't you??????? If you don't, I suggest thats you job for tommorow!!!!!!

Regards, Wayne

[Bob Patterson]

Thanks for the warning !! Might be good to pass on to the factory !

I still don't have my manual - could you describe what & where Fus-31
IS, and what it fastens ?? Thanks !!

Have noticed the tail feathers on several amphibs shaking vigorously
- this might be a contributing factor !

......bobp

-------------------------------------orig.-----------------------------------
At 05:32 PM 10/15/99 -0400, you wrote:

Hello All!

Last year when doing the annual inspecton on Howards Amphib Rebel, I found

all 3 RV1410 rivets sheared off, that attatch Fus 31 to the tail post. As
Howards aircraft was on floats all year, this can only be attributed to
torsional air loads! I checked my aircraft(on wheels) and found 2 out of 3
were sheared off! I drilled up to #11 and replaced these rivets with
RV1613's. This year while putting away Howards aircraft for the winter(he
goes to Florida for 6 months) I checked these rivets out to find that now
the Fus 31 was starting to crack at each corner relief. I constructed a
doubler to cover the portion of the Fus 31 from the tail post to the tail
spring bulkhead and riveted it down around the perimeter and re-riveted the
post with RV1613 rivets. I would suspect that this is happening in other
aircraft and suggest that anyone that is flying pulls their tail cone covers
to check(you are supposed to do this once a year you know!!!!) Those that
are building, I suggest you use 1613 rivets here instead if 1410's and make
sure you make sure that the reliefs are nice and smooth and free of nicks
prior to installation. I think someone else asked about deburring! This is
were it becomes important. Every, every, every, part should be filed clean
on all edges, inside wings or out in the open. This summer I rebuilt the
Pegastol Prototype after a less than perfect landing at Hare Field in
Bradford. I lost count of the cuts on my arms and the lost pints of blood
while working inside the wings and fuselage. Numerous corners were starting
to crack on ribs etc. from not being deburred! The little extra time will
make the aircraft last and if you do all the parts as you take them out of
the crate during inventory, you won"t need the bandaids in the first aid kit
you have screwed to the side of your work bench! You do have a first aid kit
within 5 feet of your bench don't you??????? If you don't, I suggest thats
you job for tommorow!!!!!!

Regards, Wayne

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between builders and owners of Murphy Rebel aircraft.
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*----------------------------------------------------*




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[Wayne G. O'Shea]

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Your following message has been delivered to the 134 members of
the list murphy-rebel@dcsol.com at 23:51:51 on 15 Oct 1999.
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Bob, Fus 31 is the pie shaped top plate in the tail cone that the elevator
mixer assembly mounts to! It has 3 rivets at the rear into the tail post(to
make the 3rd side of a box as the bottom of the post is not riveted or
bolted to anything). Air loads with rudder deflected etc. cause a tortional
load on the post which I suspect causes these 3 rivets to shear and thus
there is no longer a box and the fin is free to wobble.

I told Robin about this last year and suggested he check the Chilliwack
fleet!

Wayne

-----Original Message-----
From: Bob Patterson <bob.patterson@canrem.com>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Friday, October 15, 1999 10:45 PM
Subject: Re: Rebel Tail Post

Thanks for the warning !! Might be good to pass on to the factory !

I still don't have my manual - could you describe what & where Fus-31
IS, and what it fastens ?? Thanks !!

Have noticed the tail feathers on several amphibs shaking vigorously
- this might be a contributing factor !

......bobp

-------------------------------------orig.---------------------------------

--

At 05:32 PM 10/15/99 -0400, you wrote:

Hello All!

Last year when doing the annual inspecton on Howards Amphib Rebel, I found

all 3 RV1410 rivets sheared off, that attatch Fus 31 to the tail post. As
Howards aircraft was on floats all year, this can only be attributed to
torsional air loads! I checked my aircraft(on wheels) and found 2 out of 3
were sheared off! I drilled up to #11 and replaced these rivets with
RV1613's. This year while putting away Howards aircraft for the winter(he
goes to Florida for 6 months) I checked these rivets out to find that now
the Fus 31 was starting to crack at each corner relief. I constructed a
doubler to cover the portion of the Fus 31 from the tail post to the tail
spring bulkhead and riveted it down around the perimeter and re-riveted the
post with RV1613 rivets. I would suspect that this is happening in other
aircraft and suggest that anyone that is flying pulls their tail cone

covers

to check(you are supposed to do this once a year you know!!!!) Those that
are building, I suggest you use 1613 rivets here instead if 1410's and make
sure you make sure that the reliefs are nice and smooth and free of nicks
prior to installation. I think someone else asked about deburring! This is
were it becomes important. Every, every, every, part should be filed clean
on all edges, inside wings or out in the open. This summer I rebuilt the
Pegastol Prototype after a less than perfect landing at Hare Field in
Bradford. I lost count of the cuts on my arms and the lost pints of blood
while working inside the wings and fuselage. Numerous corners were starting
to crack on ribs etc. from not being deburred! The little extra time will
make the aircraft last and if you do all the parts as you take them out of
the crate during inventory, you won"t need the bandaids in the first aid

kit

you have screwed to the side of your work bench! You do have a first aid

kit

within 5 feet of your bench don't you??????? If you don't, I suggest thats
you job for tommorow!!!!!!

Regards, Wayne

*----------------------------------------------------*
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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between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*




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[Bob Patterson]

Thanks for the warning - will check it out !!

.....bobp

--------------------------------orig.---------------------------------------
At 11:45 PM 10/15/99 -0400, you wrote:

Bob, Fus 31 is the pie shaped top plate in the tail cone that the elevator
mixer assembly mounts to! It has 3 rivets at the rear into the tail post(to
make the 3rd side of a box as the bottom of the post is not riveted or
bolted to anything). Air loads with rudder deflected etc. cause a tortional
load on the post which I suspect causes these 3 rivets to shear and thus
there is no longer a box and the fin is free to wobble.

I told Robin about this last year and suggested he check the Chilliwack
fleet!

Wayne

-----Original Message-----
From: Bob Patterson <bob.patterson@canrem.com>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Friday, October 15, 1999 10:45 PM
Subject: Re: Rebel Tail Post

Thanks for the warning !! Might be good to pass on to the factory !

I still don't have my manual - could you describe what & where Fus-31
IS, and what it fastens ?? Thanks !!

Have noticed the tail feathers on several amphibs shaking vigorously
- this might be a contributing factor !

......bobp

-------------------------------------orig.---------------------------------

--

At 05:32 PM 10/15/99 -0400, you wrote:

Hello All!

Last year when doing the annual inspecton on Howards Amphib Rebel, I found

all 3 RV1410 rivets sheared off, that attatch Fus 31 to the tail post. As
Howards aircraft was on floats all year, this can only be attributed to
torsional air loads! I checked my aircraft(on wheels) and found 2 out of 3
were sheared off! I drilled up to #11 and replaced these rivets with
RV1613's. This year while putting away Howards aircraft for the winter(he
goes to Florida for 6 months) I checked these rivets out to find that now
the Fus 31 was starting to crack at each corner relief. I constructed a
doubler to cover the portion of the Fus 31 from the tail post to the tail
spring bulkhead and riveted it down around the perimeter and re-riveted the
post with RV1613 rivets. I would suspect that this is happening in other
aircraft and suggest that anyone that is flying pulls their tail cone

covers

to check(you are supposed to do this once a year you know!!!!) Those that
are building, I suggest you use 1613 rivets here instead if 1410's and make
sure you make sure that the reliefs are nice and smooth and free of nicks
prior to installation. I think someone else asked about deburring! This is
were it becomes important. Every, every, every, part should be filed clean
on all edges, inside wings or out in the open. This summer I rebuilt the
Pegastol Prototype after a less than perfect landing at Hare Field in
Bradford. I lost count of the cuts on my arms and the lost pints of blood
while working inside the wings and fuselage. Numerous corners were starting
to crack on ribs etc. from not being deburred! The little extra time will
make the aircraft last and if you do all the parts as you take them out of
the crate during inventory, you won"t need the bandaids in the first aid

kit

you have screwed to the side of your work bench! You do have a first aid

kit

within 5 feet of your bench don't you??????? If you don't, I suggest thats
you job for tommorow!!!!!!

Regards, Wayne

*----------------------------------------------------*
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
*----------------------------------------------------*




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