I seem to remember that the builder who tested this used a 50w 12v QI bulb
set between two discs of surplus firewall composite material. The whole was
then pushed on a rod down the inside of the TP tube and turned on.
However, I don't remember it being tried in situ. If done in situ, then one
would expect to at least lose the polythene collars at the inside ends of
the TP tube plus, possibly, debonding/movement of the TP bronze
bushings/surrounding composite.
I can't see any proven long term alternative to the Loctite route and that
wouldn't involve potentially protracted PFA approval. Even then, the
Loctite bond might be subject to progressive failure.
Duncan McFadyean
On Monday, January 14, 2002 9:03 AM, Peter Davis
[SMTP:pm.davis@ntlworld.com] wrote:
>
> I too fitted enlarged pins last winter - accurately machined - but now
find
> play in the tailplanes.
>
> Prior to this I bought some loctite but 'chickened out' of using it as it
> seemed too final. However, I have been told by one builder that if you go
> down this route and have to dismantle the setup, it can be done by use of
a
> 200 watt (or thereabout) halogen bulb passed down inside the torque tube
> which will soften the loctite enough to get the bits apart.
>
> I haven't tried this but am assured it works. I have also been told by
> Loctite that to get the stuff to work on stainless steel, an Activator
> (loctite 7471) has to be used.
>
> Regards
>
> Peter Davis (#154)
>
>
> -----Original Message-----
> From: owner-europa@post.aviators.net
> Subject: Re: Tailplanes
>
>
> > Would it make any sense to permanently bond the elevators in place?
> > I understand that the flight performance is exceptional with them at
full
> > size.
> > Perhaps a compromise between removableness vs small enough to fit w/in
> 7.5ft.
> > Better flutter resistance as well?
> >
> > Nic
> > xs a145
> > :)
>
> The only gamble would be whether you'd need to remove the torque tube
> to repair/replace something. Looks like hacksaw through the torque
> tube, and order up a new pair of stabilator cores and start all over?
> Flutter would be moot if factory arrangement is fabricated tightly,
> but some play is tolerable I would guess. There's a lot old planes
> with play back there, my other plane included. My inspector w/50 yrs
> experience tells me quit worrying.
>
> Regards,
> Fred F.
>
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