Rebel - Elevator Trim Horn Attachment Failure

[Wayne G. O'Shea]

Posted with a proper subject for future searches!
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I posted 5 Pics to "Rebel - Tail Feathers" of the Elevator Trim Tab Horn SB
and the doubler that I had to install as mine had cracked the flange off the
front spar as well.

Wayne

----- Original Message -----
From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
To: <murphy-rebel@dcsol.com>
Sent: Saturday, September 13, 2003 5:22 PM
Subject: Re: Rebel Flaperon Control System

As Bob states this is a better now than later item! When mine starting
letting go it had cracked the front spar in the trim tab as well. Required
opening up and inserting a spar doubler. I believe I have some pics of my
repair job if anyone is interested for me to post them to the archives (if

I

already didn't put them there, will have a look!)

The one thing to watch even after doubling up the horn is to make sure

that

you have some skin to spar rivets on each side of the servo rod horns. The
original rivet pitch left a fair space between the rivets and the horn and
this allows the area to work even more.

I'm harder on this area than most people as I use full stick forward and
lots of power all winter long lifting the tail up and out of the snow

before

I move anywhere on skis and anyone that has witnessed my summer takeoffs

as

well knows that I love to lift the tail before I have moved forward for a
shorter take off run (and also promotes less stress to the airframe on

rough

fields with the tailwheel up from the get-go!)

Cheers,
Wayne

----- Original Message -----
From: "Bob Patterson" <apat@istar.ca>
To: <murphy-rebel@dcsol.com>
Sent: Saturday, September 13, 2003 4:25 PM
Subject: Re: Rebel Flaperon Control System

Hi Brian !

I would STRONGLY recommend it !! Catch me at the Builders
Meeting tomorrow, or at the Corn/Pig Roast tonight (6 pm), for
more details . I'd be interested in having a look at your elevator
and trim - I'll show you what happened to mine in only about 200 Hr. !
There are other factors, besides the need for a stronger trim tab
horn ....

This mod is very important for faster Rebels - the chances of
flutter increase dramatically with speed - something to think about
on those long high-speed descents from 9,500 feet that I did a lot
of this summer ! (Leave power about 2,300+ rpm to avoid shock cooling,
and set up for 400 - 500 fpm descent by increasing cruise speed -
gives fuel economy and faster times point-to-point)

.....bobp

----------------------------------orig.------------------------------
At 02:37 PM 9/13/03 -0400, you wrote:

Hi Ken

I was not able to find that Service Bulletin on the MAM site. Can this
doubler be added on a flying Rebel?

Thanks

Brian #328R

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