Elevator Trim Tab Horn WAS

[Wayne G. O'Shea]

David, I just looked at the SR and it's into a rib and double horned with
one in the skin. If your's are just in the skin I would be temped to drill
out the rivets on the horns and the rib next to them and slip a scrap piece
of .040 plate or similar in there to tie the rib/front spar/skin and horns
together.

Cheers,
Wayne

----- Original Message -----
From: "David Ricker" <ricker@dbis.ns.ca>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, September 16, 2003 11:04 PM
Subject: Elevator Trim Tab Horn WAS: Re: Sunday Meeting

Brian & Guys

Just had a look at the tab & horn on our Elite and while it has the two

sided

horn (two L shaped parts back to back) the only thing it ties into except

the

skin is the front spar and this is by the first rivet of each of the L

pieces,

the rest is just the skin, not even the rib (beside it).

I am going to have a good think about whether this is serious or not but

right

now it doesn't sound good enough even compared to the (2 sided) Rebel that

at

least ties into a rib on one side.

What do you Rebel & Elite guys think? Anybody see any signs of wear &

tear on

your trims or was Bob's experience a rather scary fluke?

Bob, any idea what the factory Elite config is?

Cheers,

Dave R.
Elite583.cjb.net



Brian Cross wrote:

Hi Bob & Brampton area Rebelers

Great meeting yesterday with a lot of good information.

Based on our discussions, I checked my elevator trim tab. I could see

no

sign at all of any flexing or fatique. The paint was perfect here as
well. It does have 3 rivets - 1 into the front tab spar & 2 into a
fore/aft rib. Still, I am going to fab up a new piece to reinforce it.

It would really be helpful for MAM to publish this stuff on their site.

It

was quite a shock to find this out this weekend. I am not sure I would
have been able to handle such an ordeal re: the flutter incident! Way

to

go Bob.

I feel much the same way about the spring gear i.e. their approach has

been

underwhelming but do not want to criticize. I do feel I went out of my

way

to submit CAD drawings of all my tank improvements - many of which are
incorporated into their present design. In return, it would have been
quite easy to supply some of the basic information. It would not do

their

reputation much good to lose a builder/pilot to a flutter incident.

I also checked my elevators & found the left one to be quite tight i.e.

no

lateral movement but the right one does have some (1/16" approx).

Again, a

little thought would have gone a long way to resolve this design
weakness. I will address this over the winter as it is not serious but
left on its own, it will not get better no matter how much wishing I do.

If everyone works together we can make this a truly great aircraft

design

with outstanding operational histories.

Just my thoughts

Brian #328R

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[David Ricker]

Hi Wayne

I think you are on to something there, since only the two front rivets are into
something other than the skin I was thinking about adding a rib below one of the
horns or a piece of .032 or .040 under both and tied into the rib and the spar.
I don't like the idea of having to fix things later because they broke ....or
worse.

I don't think we will know for some time about the reliability as it is because
there aren't enough Elites out there yet building time so it is good insurance
to beef it up.

Greg, is your Elites' trim built like our #583? (BTW, congrats on finding a
good low cost 320 to start with, we are envious here. Even if you had it
overhauled right off, you are ahead $)

Cheers,

Dave




"Wayne G. O'Shea" wrote:

David, I just looked at the SR and it's into a rib and double horned with
one in the skin. If your's are just in the skin I would be temped to drill
out the rivets on the horns and the rib next to them and slip a scrap piece
of .040 plate or similar in there to tie the rib/front spar/skin and horns
together.

Cheers,
Wayne

----- Original Message -----
From: "David Ricker" <ricker@dbis.ns.ca>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, September 16, 2003 11:04 PM
Subject: Elevator Trim Tab Horn WAS: Re: Sunday Meeting

Brian & Guys

Just had a look at the tab & horn on our Elite and while it has the two

sided

horn (two L shaped parts back to back) the only thing it ties into except

the

skin is the front spar and this is by the first rivet of each of the L

pieces,

the rest is just the skin, not even the rib (beside it).

I am going to have a good think about whether this is serious or not but

right

now it doesn't sound good enough even compared to the (2 sided) Rebel that

at

least ties into a rib on one side.

What do you Rebel & Elite guys think? Anybody see any signs of wear &

tear on

your trims or was Bob's experience a rather scary fluke?

Bob, any idea what the factory Elite config is?

Cheers,

Dave R.
Elite583.cjb.net



Brian Cross wrote:

Hi Bob & Brampton area Rebelers

Great meeting yesterday with a lot of good information.

Based on our discussions, I checked my elevator trim tab. I could see

no

sign at all of any flexing or fatique. The paint was perfect here as
well. It does have 3 rivets - 1 into the front tab spar & 2 into a
fore/aft rib. Still, I am going to fab up a new piece to reinforce it.

It would really be helpful for MAM to publish this stuff on their site.

It

was quite a shock to find this out this weekend. I am not sure I would
have been able to handle such an ordeal re: the flutter incident! Way

to

go Bob.

I feel much the same way about the spring gear i.e. their approach has

been

underwhelming but do not want to criticize. I do feel I went out of my

way

to submit CAD drawings of all my tank improvements - many of which are
incorporated into their present design. In return, it would have been
quite easy to supply some of the basic information. It would not do

their

reputation much good to lose a builder/pilot to a flutter incident.

I also checked my elevators & found the left one to be quite tight i.e.

no

lateral movement but the right one does have some (1/16" approx).

Again, a

little thought would have gone a long way to resolve this design
weakness. I will address this over the winter as it is not serious but
left on its own, it will not get better no matter how much wishing I do.

If everyone works together we can make this a truly great aircraft

design

with outstanding operational histories.

Just my thoughts

Brian #328R

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--
David A. Ricker
Fall River, Nova Scotia
Canada




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