You are not in exactly the same boat as Rick, Ted. Rick says he has the
original SR2500 gear legs. Your plane is a Moose, not an SR2500. The gear
legs are completely different. I'm pretty sure they are the same where they
attach though. What I don't know is if the Moose upgrade includes enlarging
the 5/16 bolts to 3/8. As for the question about whether the 5/16 bolts
need to be enlarged to 3/8, I sent an email to MAM yesterday asking that
very question. I suspect they do not need to be enlarged for a Super Rebel
but I'll let everyone know their response when I get it.
Mike
044SR
-----Original Message-----
From:
mike.davis@dcsol.com [mailto:
mike.davis@dcsol.com] On Behalf Of Ted
Waltman
Sent: Sunday, March 26, 2006 8:00 AM
To:
rebel-builders@dcsol.com
Subject: RE: [rebel-builders] moose gear brackets and aileron hinges
Guess I'm in the same boat--original gear, brackets and bolts. I have
about 225 hours on the plane now, with maybe 70 landings during that
time that were at gross weight.
I assme there's no real way to inspect the gear, brackets and bolts to
see if a problem is developing. I assume that you don't know you have a
problem until it--catastrophically--occurs. That being said, I don't
want to start down a path where one over-engineers everything or I'll
have a tank that won't get off the ground.
Al (Pahxia), I know you had a gear collapse. I read the after-accident
engineering report. As I recall, weren't the bolts themselves from a
suspect source?
Is there another plane out there that hand a gear incident? I don't
know of one.
My questions for Brian would be whether it is absolutely imperative to
retro fit the new 309B and 310B brackets.
Ted Waltman
Moose 142SR
www.i1ci.com/flying
-----Original Message-----
From:
mike.davis@dcsol.com [mailto:
mike.davis@dcsol.com] On Behalf Of
rickhm@comcast.net
Sent: Sunday, March 26, 2006 9:50 AM
To:
rebel-builders@dcsol.com
Subject: Re: [rebel-builders] moose gear brackets and aileron hinges
Brian,
I have the original SR2500 legs and presumable the 309. Any reason I
need to enlarge bolt sizes, holes, etc.
Rick Muller
SR70
-------------- Original message --------------
From: "Brian Godden" <
brian_godden@hotmail.com>
OK, you guys are scaring me now.
There are basically three generations of Super Rebel/Moose gear
brackets.
The original 309 had a groove 1/8" machined in it and took the "c"
shaped
310. This was used on the 2500.
The Moose has a gear leg 1/8" thicker, so the 309 was machened out
another
1/8" (ie to 1/4") to accomodate it, and I believe given a 700 series
number.
It still took the original 310.
After a number of gear failures, and while Doug was building the
Bombardier
Moose, he came up with the idea of machining the groove/slot out to
the full
7/8" to take the entire gear leg, and capture it with a simple flat
bar
stock. The 309 had to be redesigned to keep the rake angles the same,
and
was given a "B" designation (bloody confusing!).
You cannot mix and match them!!!
The new set up does indeed require a lot of filing and gnashing of
teeth to
make it fit, and even then there is a gap between the flat bar stock
(310B)
and the 309B. You take this up with 3/8" washers so no preload is on
the bar
stock.
The original Rebels had AIL-26's made of plain steel. If not well
greased,
they corroded, and could lock inside the brass bushing, possibly
introducing
a turning moment on the bolt. So most of us used castle nuts.
Later kits have these made of stainless (use a magnet to check). So,
theoretically, if these are properly lubricated, the bolt, if tightly
locked
down, will not move.
I now use nylocks on the ailerons and flaps, as the chances of three
nylocks
unwinding completely and the flap or aileron falling off is pretty
remote.
You MUST use castle nuts on the tail section.
If anyone plans to do a runaway trim flight test on a Moose in the
nose down
mode, take Bob's advice....don't yard that stick too much......or
maybe just
take our word for it.
Brian
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