The Murphy Builders Site

Hi all
My Rebel kit came with a CC-48-1 mixer horn. I am not sure which way to
install it. It can be installed two ways. The bolt holes are shifted slightly
when you flip it over. I traced the part on a piece of paper to test this.
Should I buy the new -2 part (CC-48-2)? Is there any big changes with the
newer part?
Jim R254



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Jim...

I also noticed that this part was asymmetric (not a mirror image on both sides)...I asked MAM at the time as to it's orientation (and I assumed it was to correct the geometry of the parts arc as it pivoted on the flaperon arm)... but the answer I received did nothing to clear the situation up...so I made a new and symmetric (even on both sides) one up & fitted it...and our plane flies just fine :-)

Rick & Wendy
541R
(done just under 100 hours now, in 10 months !!!)

----- Original Message -----
From: Jims170A@cs.com (Jims170A@cs.com)
To: murphy-rebel@dcsol.com (murphy-rebel@dcsol.com)
Sent: Sunday, February 24, 2002 4:08 PM
Subject: Rebel Mixer horn CC-48


Hi all
My Rebel kit came with a CC-48-1 mixer horn. I am not sure which way to
install it. It can be installed two ways. The bolt holes are shifted slightly
when you flip it over. I traced the part on a piece of paper to test this.
Should I buy the new -2 part (CC-48-2)? Is there any big changes with the
newer part?
Jim R254

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Hi Jim,
I'm sure Wayne can answer this better, seeing how I've only built 1, but if the shorter side is attached to the rod from the torque tube, and the longer side is toward the flap arm, then you get more aileron with less movement.
Seems there was a question posted not long ago from someone who was not getting the full throw on their ailerons. Maybe that was the cause.
Whichever way you go, remember to have the spacer between the rod end bearing and the bottom of the bellcrank so you can get the full throw on the elevators without turning the rodend bearing in the rod. (thanks again for that one Wayne)
I guess I'm curious if there is a difference between a -1 and a -2 bellcrank. For what it's worth,
Curt N97MR (Yes it's worth it!)



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There is a diagram somewhere that shows which way the bellcrank goes.
This was mentioned in discussion here a while ago but I'm too lazy to
look it up and confirm it since Curt has already replied.

The -1 is a different shaped part and was a highly recommended upgrade.
I think (like the forward bellcrank) the -2 is the same part as the -1
but with a larger hole for the larger bellcrank bearings that are now
shipped. I believe the original bearings used a -4 bolt whereas the new
ones use a -5 bolt. The cc-48-2 won't fit the older bearings so keep
your -1.

Holler if you need any more info and I'll look for my notes.

Ken (a dashing fellow)

Jims170A@cs.com wrote:

Hi all
My Rebel kit came with a CC-48-1 mixer horn. I am not sure which way to
install it. It can be installed two ways. The bolt holes are shifted slightly
when you flip it over. I traced the part on a piece of paper to test this.
Should I buy the new -2 part (CC-48-2)? Is there any big changes with the
newer part?
Jim R254

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Jim

My apologies for not answering your question better. It looks like Curt
was referring to cc-47 so I don't think he really answered you either.

I still haven't found my notes so I will refer you to the archives or
MAM for further but my cc-48 is installed such that the space between
the forward bolt hole and the bottom bolt hole is slightly longer than
the space between the rear bolt hole and the lower bolt hole. I can't
seem to find the diagram to confirm this is correct though and it is
annoying me.

Also it looks like my memory was wrong about the bellcrank bearing hole.
It appears that the cc-48-1 also has a larger hole for the larger
bellcrank bearing. Guess I was thinking of the cc-47-xx.

I think the cc-48-2 might have just been a part renumbering for
consistency with the cc-47-2 part number but you'd have to ask MAM.

Ken

Jims170A@cs.com wrote:

Hi all
My Rebel kit came with a CC-48-1 mixer horn. I am not sure which way to
install it. It can be installed two ways. The bolt holes are shifted slightly
when you flip it over. I traced the part on a piece of paper to test this.
Should I buy the new -2 part (CC-48-2)? Is there any big changes with the
newer part?
Jim R254

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HI JIM!!

The CC-48 does have a one way orientation to work properly, yet I have seen
them installed both ways and the plane flys just fine either way! The throws
just equal out a little better if you install as below!

If you take the part in your hand so the lower rod end hole (for the push
pull that runs under the door sill) and the middle bearing hole are in line,
straight up and down, the hole to the left should be the lower of the two
"ears". This is the way it goes against the mixer arm. Left push rod bolt
hole lower than the right push rod bolt hole. (to make it really clear, if
it's all installed and you sit in the cabin and stare at it, this is the
same orientation that you should see!) This is all assuming you are going
with the original set up with the mixer arm pegged at the far left end. As
for the CC-48-1 vs the CC48-2, I have no idea what the change was, but you
already own a -1 so why spend anymore money?? Won't fly any better with
another $50 in it!

Cheers,
Wayne G. O'Shea
www.irishfield.on.ca

----- Original Message -----
From: <Jims170A@cs.com>
To: <murphy-rebel@dcsol.com>
Sent: Sunday, February 24, 2002 12:08 AM
Subject: Rebel Mixer horn CC-48

Hi all
My Rebel kit came with a CC-48-1 mixer horn. I am not sure which way to
install it. It can be installed two ways. The bolt holes are shifted

slightly

when you flip it over. I traced the part on a piece of paper to test this.
Should I buy the new -2 part (CC-48-2)? Is there any big changes with the
newer part?
Jim R254

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I should also clarify my terminology of "left and right". This is simply
left and right AS VIEWED! In fact the right horn, when looked at, runs the
left flaperon! Make sure it's that way prior to your first flight. The
results are not pretty when they are the other way around. It's been done at
least twice that I know of and even though you can get used to the "crossed"
controls in the air, instinct takes over as you get in to ground effect and
go to line her up (and it REALLY spoils everyone's day that's involved at
that point)!

Wayne

----- Original Message -----
From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
To: <murphy-rebel@dcsol.com>
Sent: Sunday, February 24, 2002 5:48 PM
Subject: Re: Rebel Mixer horn CC-48

HI JIM!!

The CC-48 does have a one way orientation to work properly, yet I have

seen

them installed both ways and the plane flys just fine either way! The

throws

just equal out a little better if you install as below!

If you take the part in your hand so the lower rod end hole (for the push
pull that runs under the door sill) and the middle bearing hole are in

line,

straight up and down, the hole to the left should be the lower of the two
"ears". This is the way it goes against the mixer arm. Left push rod bolt
hole lower than the right push rod bolt hole. (to make it really clear, if
it's all installed and you sit in the cabin and stare at it, this is the
same orientation that you should see!) This is all assuming you are going
with the original set up with the mixer arm pegged at the far left end. As
for the CC-48-1 vs the CC48-2, I have no idea what the change was, but you
already own a -1 so why spend anymore money?? Won't fly any better with
another $50 in it!

Cheers,
Wayne G. O'Shea
www.irishfield.on.ca

----- Original Message -----
From: <Jims170A@cs.com>
To: <murphy-rebel@dcsol.com>
Sent: Sunday, February 24, 2002 12:08 AM
Subject: Rebel Mixer horn CC-48

Hi all
My Rebel kit came with a CC-48-1 mixer horn. I am not sure which way to
install it. It can be installed two ways. The bolt holes are shifted

slightly

when you flip it over. I traced the part on a piece of paper to test

this.

Should I buy the new -2 part (CC-48-2)? Is there any big changes with

the

newer part?
Jim R254

** To unsubscribe, send e-mail to list-server@dcsol.com with

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Jim and others,
Wayne is correct in defining the orientation of CC-48. One of the things that
I noticed was that with the forward hole placed in the higher position (as it is
shown in the manual) the push/pull tube from the forward bellcrank (CC-47) will
have more clearance when the tube assembly is in the rearward position. Also as
Wayne pointed out, the rearward hole drives the right aileron if all of your
horns are positioned as described in the manual. This can get confusing and there
may be other errors that you have built in so it is best to check that when you
push your control stick left, the left aileron should go up. One excellent way to
remember this is to grasp the control stick, point your thumb up, now when you
move the stick to the left your thumb will show you the direction of the aileron
deflection (up). And when you push the stick right, your thumb will be showing
you the direction the right aileron should be pointing.
Here is another suggestion, color code the parts. I have painted the front
end of my CC-48, the upper left aileron control horn, the left aileron push rod
and the front side of mixer arm (CC-76) with red paint, and the rear end end of
CC-48, the upper right aileron control horn, the right aileron push rod and the
rear of the CC-76 with green paint. Don't forget that great suggestion by Wayne
O. to use some stiff wood pieces as practice push rods until you get the lengths
that you want. Clamp 2 pieces together and adjust to get the length you need.
Did you all know that Aristotle Onassis's son was killed in a large twin when
the ship came out of maintainence after having work done on the ailerons and they
were hooked up backwards.
Good luck, you'll need it,
Rick D.
Rebel N754SM getting close


Jims170A@cs.com wrote:

Hi all
My Rebel kit came with a CC-48-1 mixer horn. I am not sure which way to
install it. It can be installed two ways. The bolt holes are shifted slightly
when you flip it over. I traced the part on a piece of paper to test this.
Should I buy the new -2 part (CC-48-2)? Is there any big changes with the
newer part?
Jim R254

** To unsubscribe, send e-mail to list-server@dcsol.com with **
** UNSUBSCRIBE MURPHY-REBEL in the message body on a line by itself **
** Archives located at http://rebel:builder@www.dcsol.com:81/default.htm **
** To contact the list admin, e-mail mike.davis@dcsol.com **

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