Geraint,
1. I'm with others on this - use a bolt.
2. Forget the fiddling and the turnbuckles - here's what to do:
Attach the rear end of each wire in position on the plastic bits as
instructed.
Remove the lower retaining bolt on TP18 and swing the latter up through
30
degrees or so.
Attach the wires forward ends to TP18 sliding on the swages in their
proper positions.
Using temporary "bulldog clamps" (small U bolts) fitted behind the
swages
and slightly tightened, pull the wires such that they have nominal and
roughly equal tensions - no need for great tensions yet.
Exploiting the different centres of rotation of the wires and TP18, you
can now lower the arm to apply the tension to the wires.
If the arm moves to one side when lowered into position, lift it up
again,
adjust the proper wire and lower again.
This way you can have all the tension you need (mine's tuned to C sharp
-
but if you're a Bach fan you can use D) and precisely equal tensions so
TP18 sits in the middle.
Careful not to overdo the tension though; I think it may be possible to
bend the tailplane torque tube with this method if you're a bit over
zealous.
Dave Simpson
----------
> From: GERAINT L OWENS <lloyd.owens@lineone.net>
> Subject: Tailplane Mass Balance Cables
> Date: 14 February 1999 20:53
>
> Two simple queries:
> 1 What technique is used to insert the 6mm roll pin in the TP18 to stop
> the weights from falling off. Mine won't go in - do I need a special
tool,
> or what? I presume the part called SPIROL is the same as the 6mm roll
pin,
> although there is nothing in the manual to connect the two.
>
> 2 Secondly, with regard to the wires. One I have a nice tension in.
> The other I have now done three times (!) and have still not matched the
> tension in the first. In fact, on this wire I have edged the cable
(where
> it is wound round the white plastic collar) about 1/4" further outboard
from
> the pins, so that the tension in this wire matches the first. It seems
to
> hold in place here; but is this acceptable. Are the wires simply a
> safeguard in case the TP18 comes loose, or is it crucial that both wires
are
> nicely and equally tensioned? This is easier said than done; one can't
> help but wonder if there wasn't a better and easier way of stabilising
the
> TP18.
> Lloyd Owens (Bu. No. 097)
>
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