The Murphy Builders Site

Hi Gang,
Brian Godden has been here for the past three days helping do the annual
inspection of the Moose,
464 hours total time, 74 hours on wheels, 390 on floats, 200 hours this

year. I had noted that the tail wrap fitting where the stinger exits the
tail cone had damage.
Brian found cracks in the bulkhead that holds the tail stinger, it was the
first place he looked. Brian's comment was "that is where they all crack".
He said Darryl's position was that the cracking was an anomaly.
Brian's fix was to install an angle on each side over the crack and attach
the angle to the side of the tailcone by added an additional angle down

side of the tail wrap, backing the existing flange.
We are not sure the fix is a great fix, needs more engineering. Brian

the bulkhead is way under designed for the size of the airplane and that
area need lots of beefing up. My friend Graham Clapp, retired Boeing
Structures Engineer says the stinger needs to float in a shock mount at

forward end. That will absorb some of the shock load of the stinger. He
thinks the rigid mounting is a major part of the problem.
I just don't know what to think, what do you guys think? I will post
pictures.
Al
Moose, N526AP





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Hi Gang,
Brian Godden has been here for the past three days helping do the annual
inspection of the Moose,
464 hours total time, 74 hours on wheels, 390 on floats, 200 hours this
past
year. I had noted that the tail wrap fitting where the stinger exits the
tail cone had damage.
Brian found cracks in the bulkhead that holds the tail stinger, it was the
first place he looked. Brian's comment was "that is where they all crack".
He said Darryl's position was that the cracking was an anomaly.
Brian's fix was to install an angle on each side over the crack and attach
the angle to the side of the tailcone by added an additional angle down
the
side of the tail wrap, backing the existing flange.
We are not sure the fix is a great fix, needs more engineering. Brian
thinks
the bulkhead is way under designed for the size of the airplane and that
area need lots of beefing up. My friend Graham Clapp, retired Boeing
Structures Engineer says the stinger needs to float in a shock mount at
the
forward end. That will absorb some of the shock load of the stinger. He
thinks the rigid mounting is a major part of the problem.
I just don't know what to think, what do you guys think? I will post
pictures.
Al
Moose, N526AP





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-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Al
Paxhia
Sent: Thursday, March 31, 2005 9:01 PM
To: rebel-builders@dcsol.com
Subject: Cracks in tail stinger bulkhead

Hi Gang,
Brian Godden has been here for the past three days helping do the annual
inspection of the Moose,
464 hours total time, 74 hours on wheels, 390 on floats, 200 hours this
past
year. I had noted that the tail wrap fitting where the stinger exits the
tail cone had damage.
Brian found cracks in the bulkhead that holds the tail stinger, it was the
first place he looked. Brian's comment was "that is where they all crack".
He said Darryl's position was that the cracking was an anomaly.
Brian's fix was to install an angle on each side over the crack and attach
the angle to the side of the tailcone by added an additional angle down
the
side of the tail wrap, backing the existing flange.
We are not sure the fix is a great fix, needs more engineering. Brian
thinks
the bulkhead is way under designed for the size of the airplane and that
area need lots of beefing up. My friend Graham Clapp, retired Boeing
Structures Engineer says the stinger needs to float in a shock mount at
the
forward end. That will absorb some of the shock load of the stinger. He
thinks the rigid mounting is a major part of the problem.
I just don't know what to think, what do you guys think? I will post
pictures.
Al
Moose, N526AP





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To: <rebel-builders@dcsol.com>
Sent: Thursday, March 31, 2005 21:01 PM
Subject: Cracks in tail stinger bulkhead

Hi Gang,
Brian Godden has been here for the past three days helping do the annual
inspection of the Moose,
464 hours total time, 74 hours on wheels, 390 on floats, 200 hours this

past

year. I had noted that the tail wrap fitting where the stinger exits

tail cone had damage.
Brian found cracks in the bulkhead that holds the tail stinger, it was

first place he looked. Brian's comment was "that is where they all

He said Darryl's position was that the cracking was an anomaly.
Brian's fix was to install an angle on each side over the crack and

the angle to the side of the tailcone by added an additional angle down

the

side of the tail wrap, backing the existing flange.
We are not sure the fix is a great fix, needs more engineering. Brian

thinks

the bulkhead is way under designed for the size of the airplane and that
area need lots of beefing up. My friend Graham Clapp, retired Boeing
Structures Engineer says the stinger needs to float in a shock mount at

the

forward end. That will absorb some of the shock load of the stinger. He
thinks the rigid mounting is a major part of the problem.
I just don't know what to think, what do you guys think? I will post
pictures.
Al
Moose, N526AP





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-----------------------------------------------------------------

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Al,

Did Brian mention what the cause of it was?

Maybe more two wheel landings.

Maybe a different length on the tiger tail.......


Barny
SR 103 20bt


----- Original Message ----- > From: "Al Paxhia" <paxhia2@comcast.net>

To: <rebel-builders@dcsol.com>
Sent: Thursday, March 31, 2005 21:01 PM
Subject: Cracks in tail stinger bulkhead

Hi Gang,
Brian Godden has been here for the past three days helping do the
annual
inspection of the Moose,
464 hours total time, 74 hours on wheels, 390 on floats, 200 hours this

past

year. I had noted that the tail wrap fitting where the stinger exits

the

tail cone had damage.
Brian found cracks in the bulkhead that holds the tail stinger, it was

the

first place he looked. Brian's comment was "that is where they all

crack".

He said Darryl's position was that the cracking was an anomaly.
Brian's fix was to install an angle on each side over the crack and

attach

the angle to the side of the tailcone by added an additional angle down

the

side of the tail wrap, backing the existing flange.
We are not sure the fix is a great fix, needs more engineering. Brian

thinks

the bulkhead is way under designed for the size of the airplane and
that
area need lots of beefing up. My friend Graham Clapp, retired Boeing
Structures Engineer says the stinger needs to float in a shock mount at

the

forward end. That will absorb some of the shock load of the stinger. He
thinks the rigid mounting is a major part of the problem.
I just don't know what to think, what do you guys think? I will post
pictures.
Al
Moose, N526AP





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