Fuselage torque tubes

[Legeorgen]

It's awful quiet out there.

When I am stumped with something I always think of Wayne, however, I know
there is lots of you fellows with a wealth of knowledge who have answers. I
have a few questions about the fuselage control torque tubes. I did not build
the tubes (they were completed when I bought the kit) they differ somewhat
from the manual.

On the outboard end of each fuselage torque tube there is a AN4-16A bolt
screwed into the end plug and anchor nut. The bolt head is cut off so it will
insert into the end plugs on the wing torque tubes so as to keep the tubes
aligned.

These bolts with the heads cut off stick out of the tube ends 3/4" on my
plane, but the W-62-1 spacers that fit between the horns and space the
control tubes are also 3/4" wide. This means the bolts don't have sufficient
length to insert into the wing tubes.

I have no way of knowing how far into the anchor nut these bolts where
screwed in. I can remove the bolt with a vice grip and screw in another one,
then cut the head off to leave the bolt 1' long. This will allow the bolt to
insert into the wing torque tube a 1/4". Is a 1/4" sufficient overlap?

There is more that confuses me. The W-62-1 spacers are called out to be
installed with AN3-11A bolts (page 26, step 31, of the CD manual) but this
bolt length is to short too install the 3/4" wide spacers between the horns.
It requires a AN3-12A bolt to install the 3/4" wide spacers. The manual
mention the spacers may need to be sanded but does not give a specific length.

However, shortening the W-62-1 spacer, instead of lengthening the bolts with
the cut off heads, would require the fuselage control tubes to spread and
they are held together with an inaccessible bolt and fiber nut that sandwich
the hanger bracket (CC-78). So lengthening the bolt with the cut off head
seems the only option.

Another question concerning the control tubes. The AIL-26 bushings that
sandwich the CC-78 hanger bracket are called out to be bolted tight against
the hanger bracket (page 22, step 13, CD manual). One of these bushings I can
see rotate slightly when the tube is twisted. Should this bushing not rotate
at all and the control tubes rotate freely on the bushing?

Finally, the manual says the short fuselage control tube should be cut to 5
3/8" long. My tube was made 4 3/8" long. I can see that if it was 5 3/8" long
it would stick out of the left fuselage side so far as to leave no space for
the W-62-1 spacers between the horns. I checked the location of the hanger
bracket on the fuselage and it "is" mounted at the proper 4 1/8" from the
left fuselage side, just as the manual calls it to be.

So, to recap I have 4 questions really.

1. How long should the bolts be (with the heads cut off) that insert into the
wing torque tubes and is 1/4" penetration into the wing torque tube enough?

2. What length are the W-62-1 spacer between the control tube horns supposed
to be?

3. Are the AIL-26 bushings, sandwiching the hanger bracket, tightened so they
don't move or is it OK for them to rotate slightly when the control tube is
twisted?

4. Is the short fuselage torque tube supposed to be 5 3/8" long? if so I
don't see how it could fit.

Thanks for any help
Blue skies and tail winds
Bruce G 357R



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[Robert Johnson]

The cut-off bolts on my Rebel "652" projected into the wing tubes about 1/4"
also on assembly. This is an alignment only and is quite adequate. There are
two bolts installed with the spacers on final assembly. The lengths of the
tubes on mine where made exactly per my "book" manual which was 5 3/8 and 40
1/4". The spacers in between ended up only about 1/4" thickness and this can
only be determined after mounting the wings. The Ail 26 bushings do get
tightened against the hanger bracket as the torque tubes rotate on these
bushings. I hope this helps some.-Bob J.




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[Wayne G. O'Shea]

Bruce, I'm back in "Rebel mode" so I'll help out the "orphaned Rebel
builder"!! :>) :>)

1/ As Bob pointed out the cut off bolt needs to just make it into the plugs
holes to align the center axis. As long as you have engagement that is all
that is required.

2/ You make the W-62 match the gap between your wing horn and the cabin
horn( every Rebel is diff). I like to put a spacer between the cabin hanger
bracket and the tube end that is half the width of the play in the tube. ie:
if you can slide the cabin tube back and forth on the bushing 3/8", space
with a 3/16 spacer while you set up your wing root spacer size. THis ensures
that nothing is bottoming during flex (impact) etc and makes for smoother
controls. I generally just use penny washers to fill the gap in place of the
W-62's. Easier to get a matching thickness of spacer for each of the two
bolts, if you don't have a mill to do your W-62's on.

3/ They should be tight!

4/ On every Rebel I have built, I have cut the left hand tube 4 5/8", as 5
3/8 was too long on my first one. Yours is fine at 4 3/8"!

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

----- Original Message -----
From: <Legeorgen@cs.com>
To: <murphy-rebel@dcsol.com>
Sent: Sunday, March 17, 2002 8:45 PM
Subject: Re: Fuselage torque tubes

It's awful quiet out there.
So, to recap I have 4 questions really.

CLIP-------

1. How long should the bolts be (with the heads cut off) that insert into

the

wing torque tubes and is 1/4" penetration into the wing torque tube

enough?

2. What length are the W-62-1 spacer between the control tube horns

supposed

to be?

3. Are the AIL-26 bushings, sandwiching the hanger bracket, tightened so

they

don't move or is it OK for them to rotate slightly when the control tube

is

twisted?

4. Is the short fuselage torque tube supposed to be 5 3/8" long? if so I
don't see how it could fit.

Thanks for any help
Blue skies and tail winds
Bruce G 357R

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[Legeorgen]

Thanks, Wayne and Bob, for help with the torque tube questions. I feel better
already!

My AIL-26 bushing does rotate slightly and I don't know of a way to tighten
it without cutting a whole in the torque tubes to access the nut and bolt. Is
it OK to leave it, or should I make new tubes (yuk)? The affect of leaving
it, as near as I can tell, is to cause the bushing to wear against the hanger
and over time make it sloppy.

Bruce G




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[Murray & Carol]

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[Murray & Carol]

Blue skies and tailwinds

Will try to help a little.
The W-62-1 spacers are 3/8 long each. Page11,ch. 20 #8.

The fuselodge torque tube is 5 3/8 long.Ch. 20,p.22,#5.

AN AN4-16A bolt is specified for the end of the torque tube which you cut
the end off. P.22, ch. 20,#10. Insert length is not mentioned.

I'm not quite there yet. I have just riveted the floor in.

Good luck

Murray Cherkas
REBEL 505





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[Wayne G. O'Shea]

You could try a dab of super glue between the bushing and the hanger bracket
to get it to stick and then lube the he-- out of the area after it dries to
get the cap holes spinning on the bushing!

Wayne

----- Original Message -----
From: <Legeorgen@cs.com>
To: <murphy-rebel@dcsol.com>
Sent: Monday, March 18, 2002 11:18 PM
Subject: Re: Fuselage torque tubes

Thanks, Wayne and Bob, for help with the torque tube questions. I feel

better

already!

My AIL-26 bushing does rotate slightly and I don't know of a way to

tighten

it without cutting a whole in the torque tubes to access the nut and bolt.

Is

it OK to leave it, or should I make new tubes (yuk)? The affect of leaving
it, as near as I can tell, is to cause the bushing to wear against the

hanger

and over time make it sloppy.

Bruce G


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