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SR3500 Wing Doubler & tip tanks

Posted: Fri Feb 17, 2012 9:16 pm
by bear
Warren , I have just completed the drilling of
the RH wing as as 3500. I have decided to flush
rivet the leading edge but not the doubler. I am
also working on possibly installing wing tip tanks
that would give me 20 usg/wing. (120 usg) in total
for all tanks. I have been in touch with MAM and
have sent them my proposed procedure and a bill of
material for them to approve. It appears that I
may get an increased gross for full wing tanks.
They are doing the calculation. I am still working
until Sept 14 then will retire AGAIN and return to
building C-FISH full time .
Gerry




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Date: Fri, 03 Aug 2001 12:12:03 +0400
From: "Warren T. Montgomery" <monty@emirates.net.ae>
Subject: Re: Epoxy Primer EP-420 (Gerry & Rebel 505)
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Thanks Gerry & Rebel 505

MAM is sending the product info on EP-420 so
will use that to come up
with something however the F-580-2010, Primer
epoxy strontium chromate
for Airbus sounds like it'll work.

Sorry I didn't get by your place Gerry but we
just flashed through
Saskatoon, as usual did more traveling then we
had time for. We did buy
the lot at the Airranch in Okotoks so will have
a home for the SR.
My parts for the upgrade are enroute so haven't
looked at what lies
ahead. I had some 5/32 flush rivets that I used
on the leading edge
extension as the holes didn't line up. Although
as you know I dimpled my
leading edge. I wouldn't think there would be
enough material to
countersink for 5/32 or 3/16 rivets. I missed
drilled a hole in the tail
skin as an '8' and had to enlarge to 3/16. I
then reduced the profile of
a 3/16 flush rivet so it wouldn't stand out from
the 1/8". You can also
get low profile rivets that might work as they
would take a smaller
countersunk area.

Just closed off the rudder after installing an
electric trim as per the
elevator. 4" x 11.5" on second large bay from
bottom. Will now work on
the cabin area as I await the upgrade kit.

Warren

Date: Wed, 01 Aug 2001 18:04:06 -0800
From: bear@dcsol.com
To: monty@emirates.net.ae
Subject: Epoxy Primer EP-420
Hi Warren, I missed you the last time you were in
Canada. I am using a Strontium primer that I get
from Endura in Edmonton. EP-PA SR 2 Part. Not
sure if this helps you considering where you are
located. What are you doing with the new doubler
on the wings for the 3500 upgrade. Are you
countersinking your rivets on the doubler. As you
know I have countersunk my leading edges and would
like to do the same on the doubler. Not sure I can
considering some rivets are 3/16 and 5/32. Any
suggestions?? I suppose I can flush the rest of
the leading edge and not do the doubler. Not sure
how that will look.
Gerry



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SR3500 Wing Doubler & tip tanks

Posted: Fri Feb 17, 2012 9:16 pm
by mike.davis
We have a builder here in Fairbanks who has 5
bays inboard, and 2 or 3 bays out near the tip as
fuel tanks. I'd have to check with him whether
MAM approved the mods for the tip tanks, but I do
know that they provided the inboard tank skins 2
bays longer for him instead of the 1 bay normally
associated with extended tanks.

When Mike Kimball and I went by to see his
project we asked why he wanted to carry so much
fuel... he calmly replied that he intended to
have the first turbo prop SR! Should be
interesting.

Mike
Warren , I have just completed the drilling of
the RH wing as as 3500. I have decided to flush
rivet the leading edge but not the doubler. I am
also working on possibly installing wing tip
tanks
that would give me 20 usg/wing. (120 usg) in
total
for all tanks. I have been in touch with MAM and
have sent them my proposed procedure and a bill
of
material for them to approve. It appears that I
may get an increased gross for full wing tanks.
They are doing the calculation. I am still
working
until Sept 14 then will retire AGAIN and return
to
building C-FISH full time .
Gerry

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SR3500 Wing Doubler & tip tanks

Posted: Fri Feb 17, 2012 9:16 pm
by Warren T. Montgomery
King Kong bladder and an iron butt?
We have a builder here in Fairbanks who has 5
bays inboard, and 2 or 3 bays out near the tip as
fuel tanks. I'd have to check with him whether
MAM approved the mods for the tip tanks, but I do
know that they provided the inboard tank skins 2
bays longer for him instead of the 1 bay normally
associated with extended tanks.

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