The Murphy Builders Site

I got my trim servo installed with nutplates and the pushrod all fitted. I
only drilled one hole in the horn, right at the end. As currently adjusted,
anticipating a need for more nose up trim than nose down, I have about 1"
of trim tab down throw at the trailing edge, and about 5/8" up. Will this
be enough, or do I need to drill another hole further down the horn?
Problem is that I had to "scallop" out the edge of the horn quite a bit for
clevis clearance so if I make another hole it will have to be quite far
down. Thanks
Jesse





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Hi Jesse !

Shouldn't be much of a problem - one hardly ever uses the trim
on a Rebel ! Just set it once - very near neutral, and leave it !!!

Rebels are NOT like Cessnas - or ANYTHING else - MUCH nicer !! :-)

...........bobp

I agree it'll probably be fine but I always trim full nose up for landing.
Trim also changes with speed and baggage on my plane
Drew

At 11:04 PM 12/22/2004 -0500, you wrote:

Hi Jesse !

Shouldn't be much of a problem - one hardly ever uses the trim
on a Rebel ! Just set it once - very near neutral, and leave it !!!

Rebels are NOT like Cessnas - or ANYTHING else - MUCH nicer !! :-)

...........bobp

Hi Drew !

That is VERY unusual !! Perhaps you have a very forward C of G ??

The control forces are so light in the Rebel that I never change the trim
setting - just not necessary ..... One big disadvantage of full nose

trim on landing is - you lose a large chunk of elevator area and authority

This can make it hard to get a good flare & touchdown.

Jesse - you mention "trim horn" - I <HOPE> you are referring to the
doubled (back to back) horn legs, as per the factory Bulletin ! If you
don't have the 2 trim horns, you definitely SHOULD do that !!!

........bobp

-------------------------------orig.-------------------------
On Wednesday 22 December 2004 11:17 pm, Drew Dalgleish wrote:

I agree it'll probably be fine but I always trim full nose up for

Trim also changes with speed and baggage on my plane
Drew

At 11:04 PM 12/22/2004 -0500, you wrote:

Hi Jesse !

Shouldn't be much of a problem - one hardly ever uses the trim
on a Rebel ! Just set it once - very near neutral, and leave it !!!

Rebels are NOT like Cessnas - or ANYTHING else - MUCH nicer !! :-)

...........bobp

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I don't know about the Rebel, but, when I put a lot of baggage (re
camping equipment and food) plus my wife and kids in my Moose, I have to
have nearly full forward trim.

I try to have 1/2 aft trim for landing. I want to be able to do a
go-around without having to use both (weak) arms on the stick trying to
keep it from going vertical <grin> with full power.

Ted

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: Wednesday, December 22, 2004 8:14 PM
To: rebel-builders@dcsol.com
Subject: Rebel trim tab throw


I got my trim servo installed with nutplates and the pushrod all fitted.
I
only drilled one hole in the horn, right at the end. As currently
adjusted,
anticipating a need for more nose up trim than nose down, I have about
1" of
trim tab down throw at the trailing edge, and about 5/8" up. Will this
be
enough, or do I need to drill another hole further down the horn?
Problem is
that I had to "scallop" out the edge of the horn quite a bit for clevis
clearance so if I make another hole it will have to be quite far down.
Thanks Jesse




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I am told by another Moose owner that if you go too slow, I think arountd
65mph on final that the tail wants to sink and there is nothing you can do
about it. He did the M14 radial prior to Mam so maybe the c of g is
different. Is yours a Mam conversion? Or is the horizontal stab too small.
He said it prevented him from doing stol landings. Any comments.
----- Original Message -----
From: "Ted Waltman" <tedwaltman@i1ci.com>
To: <rebel-builders@dcsol.com>
Sent: Thursday, December 23, 2004 9:32 AM
Subject: RE: Rebel trim tab throw

I don't know about the Rebel, but, when I put a lot of baggage (re
camping equipment and food) plus my wife and kids in my Moose, I have to
have nearly full forward trim.

I try to have 1/2 aft trim for landing. I want to be able to do a
go-around without having to use both (weak) arms on the stick trying to
keep it from going vertical <grin> with full power.

Ted

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: Wednesday, December 22, 2004 8:14 PM
To: rebel-builders@dcsol.com
Subject: Rebel trim tab throw


I got my trim servo installed with nutplates and the pushrod all fitted.
I
only drilled one hole in the horn, right at the end. As currently
adjusted,
anticipating a need for more nose up trim than nose down, I have about
1" of
trim tab down throw at the trailing edge, and about 5/8" up. Will this
be
enough, or do I need to drill another hole further down the horn?
Problem is
that I had to "scallop" out the edge of the horn quite a bit for clevis
clearance so if I make another hole it will have to be quite far down.
Thanks Jesse




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Larry...tell him to try putting some power on. You can't land the 4415
wing
STOL without power...it just don't work. The airfoil will quit flying nose
high without power. Takes some getting use to it and until you are well
versed in full power bursts to get some forward momentum (to avoid a
vertical drop without forward motion) carry min 60MPH down final..round it
out and let it slow while you gentle pull the stick back to avoid
ballooning.

Cheers,
Wayne

----- Original Message -----
From: "larry173" <larry@thermaire.com>
To: <rebel-builders@dcsol.com>
Sent: Thursday, December 23, 2004 9:48 AM
Subject: Re: Rebel trim tab throw

I am told by another Moose owner that if you go too slow, I think arountd
65mph on final that the tail wants to sink and there is nothing you can
do
about it. He did the M14 radial prior to Mam so maybe the c of g is
different. Is yours a Mam conversion? Or is the horizontal stab too
small.
He said it prevented him from doing stol landings. Any comments.
----- Original Message -----
From: "Ted Waltman" <tedwaltman@i1ci.com>
To: <rebel-builders@dcsol.com>
Sent: Thursday, December 23, 2004 9:32 AM
Subject: RE: Rebel trim tab throw

I don't know about the Rebel, but, when I put a lot of baggage (re
camping equipment and food) plus my wife and kids in my Moose, I have
to
have nearly full forward trim.

I try to have 1/2 aft trim for landing. I want to be able to do a
go-around without having to use both (weak) arms on the stick trying to
keep it from going vertical <grin> with full power.

Ted

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: Wednesday, December 22, 2004 8:14 PM
To: rebel-builders@dcsol.com
Subject: Rebel trim tab throw


I got my trim servo installed with nutplates and the pushrod all
fitted.
I
only drilled one hole in the horn, right at the end. As currently
adjusted,
anticipating a need for more nose up trim than nose down, I have about
1" of
trim tab down throw at the trailing edge, and about 5/8" up. Will this
be
enough, or do I need to drill another hole further down the horn?
Problem is
that I had to "scallop" out the edge of the horn quite a bit for clevis
clearance so if I make another hole it will have to be quite far down.
Thanks Jesse




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Hi Drew !

That is VERY unusual !! Perhaps you have a very forward C of G ??

The control forces are so light in the Rebel that I never change the trim
setting - just not necessary ..... One big disadvantage of full nose up
trim on landing is - you lose a large chunk of elevator area and authority !
This can make it hard to get a good flare & touchdown.

Jesse - you mention "trim horn" - I <HOPE> you are referring to the
doubled (back to back) horn legs, as per the factory Bulletin ! If you
don't have the 2 trim horns, you definitely SHOULD do that !!!

........bobp

-------------------------------orig.-------------------------
On Wednesday 22 December 2004 11:17 pm, Drew Dalgleish wrote:

I agree it'll probably be fine but I always trim full nose up for landing.
Trim also changes with speed and baggage on my plane
Drew

At 11:04 PM 12/22/2004 -0500, you wrote:

Hi Jesse !

Shouldn't be much of a problem - one hardly ever uses the trim
on a Rebel ! Just set it once - very near neutral, and leave it !!!

Rebels are NOT like Cessnas - or ANYTHING else - MUCH nicer !! :-)

...........bobp

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-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
Drew Dalgleish
Sent: Thursday, December 23, 2004 7:04 PM
To: rebel-builders@dcsol.com
Subject: Re: Rebel trim tab throw


well I do have a forward CofG when light. All my best
landings are when my
100lb labrador retriever is in the back to critique me
;) To be honest
I've never made many landings without trimming I'll
have to do a little
experimenting instead of just going along with my old
cessna habits.

At 11:35 PM 12/22/2004 -0500, you wrote:

Hi Drew !

That is VERY unusual !! Perhaps you have a very

forward C of G ??

The control forces are so light in the Rebel that I

never change the trim

setting - just not necessary ..... One big

disadvantage of full nose up

trim on landing is - you lose a large chunk of

elevator area and authority !

This can make it hard to get a good flare & touchdown.

Jesse - you mention "trim horn" - I <HOPE> you are

referring to the

doubled (back to back) horn legs, as per the factory

Bulletin ! If you

don't have the 2 trim horns, you definitely SHOULD do that !!!

........bobp

-------------------------------orig.-------------------------

On Wednesday 22 December 2004 11:17 pm, Drew Dalgleish wrote:

I agree it'll probably be fine but I always trim

full nose up for landing.

Trim also changes with speed and baggage on my plane
Drew

At 11:04 PM 12/22/2004 -0500, you wrote:

uses the trim

neutral, and leave it !!!

MUCH nicer !! :-)

------------------------------------------------------

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From: Bob Patterson <beep@sympatico.ca>
Reply-To: <rebel-builders@dcsol.com>
To: <rebel-builders@dcsol.com>
Subject: Re: Rebel trim tab throw
Date: Wed, 22 Dec 2004 23:35:21 -0500

Hi Drew !

That is VERY unusual !! Perhaps you have a very forward C of G ??

The control forces are so light in the Rebel that I never change the trim
setting - just not necessary ..... One big disadvantage of full nose
up
trim on landing is - you lose a large chunk of elevator area and authority
!
This can make it hard to get a good flare & touchdown.

Jesse - you mention "trim horn" - I <HOPE> you are referring to the
doubled (back to back) horn legs, as per the factory Bulletin ! If you
don't have the 2 trim horns, you definitely SHOULD do that !!!

........bobp

-------------------------------orig.-------------------------
On Wednesday 22 December 2004 11:17 pm, Drew Dalgleish wrote:

I agree it'll probably be fine but I always trim full nose up for

landing.

Trim also changes with speed and baggage on my plane
Drew

At 11:04 PM 12/22/2004 -0500, you wrote:

Hi Jesse !

Shouldn't be much of a problem - one hardly ever uses the trim
on a Rebel ! Just set it once - very near neutral, and leave it !!!

Rebels are NOT like Cessnas - or ANYTHING else - MUCH nicer !! :-)

...........bobp

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