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indigoonlatigo(at)msn.com
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 Posted: Mon Nov 13, 2006 8:05 am Post subject: First impression, tailcone/main fuse joint |
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I spent this weekend drilling and dimpling the holes which make up the joint
of the rear and main fuse.
I was shocked at how little material there is that overlap this area.
three inches of the main fuse longeron and it appears the rest is a skin
joint.
The baggage floor ribs join up with the F1006 bulkhead, but the bellcrank
ribs in the tailcone don't even directly join with these baggage floor ribs.
Non of the tailcone stringers transition across this joint. I realize the
fiberglass top will add a lot of strength, but other than that, it seems the
skins are taking all the loads and relaying on shear strength. I frightens
me to think about removing the support under the tail once all is complete.
Next, thinking about a good load placed on the tail when hitting turbulence
at high speed.
Even my wife looked at it with her non engineering background and said, is
that all that hold the tail on.
What is my dental/engineering background missing?
Did any one else feel this way?
JOhn G. 409
Do Not Archive
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Tim(at)MyRV10.com
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| Posted: Mon Nov 13, 2006 8:38 am Post subject: First impression, tailcone/main fuse joint |
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John, Did you find in your parts list a part number
BG-10552? That's 4 sticks of wrigley's bubble gum
that's used to make the remainder of the bond between
sections. 
I don't think you have to worry about pulling your tail
stand out, having flown in turbulence and taken a good
hit once, but you're definitely right that to an
untrained eye like mine it seems strange. The engineers
hopefully knew everything they needed to on that one.
FWIW, I would think the skins take a lot of load, but
perhaps it's got plenty of strength.
One thing to note though, that I've seen here on this
list before (even recently) is that it might not be
a good idea to cut in external access panels or
cut stringers in that area without doing a bunch of
beefing up.
Since it hasn't crashed yet, I'm just hoping that by
maintaining good flying attitude, and clearance from
T-storms, that I can never get a chance to test
the ultimate load strength of that joint.
Tim Olson - RV-10 N104CD - Flying
do not archive
John Gonzalez wrote:
| Quote: |
I spent this weekend drilling and dimpling the holes which make up the
joint of the rear and main fuse.
I was shocked at how little material there is that overlap this area.
three inches of the main fuse longeron and it appears the rest is a skin
joint.
The baggage floor ribs join up with the F1006 bulkhead, but the
bellcrank ribs in the tailcone don't even directly join with these
baggage floor ribs. Non of the tailcone stringers transition across
this joint. I realize the fiberglass top will add a lot of strength,
but other than that, it seems the skins are taking all the loads and
relaying on shear strength. I frightens me to think about removing the
support under the tail once all is complete. Next, thinking about a
good load placed on the tail when hitting turbulence at high speed.
Even my wife looked at it with her non engineering background and said,
is that all that hold the tail on.
What is my dental/engineering background missing?
Did any one else feel this way?
JOhn G. 409
Do Not Archive
|
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http://www.matronics.com/Navigator?RV10-List |
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