Remi
the clamp solution was Nigel Graham's not mine, but I do like it. I'm
pleased your solution works too, my reservations about taper pins are
about the risk of distorting the cross tube and causing binding in the
bearings
regards
Graham
Rmi Guerner wrote:
> Hi Graham,
>
>
>
> Sorry I missed your clamp solution. Anyway, I went the taper pin way.
> Easy to do and very effective.
>
> Remi
>
>
>
>
> From: "R.C.Harrison" <ptag.dev@tiscali.co.uk
> <mailto:ptag.dev@tiscali.co.uk>>
> Subject: RE: Europa-List: Tailplane flutter
>
> Hi! Remi
> You forgot my torque tube clamps as a permanent fix for no slop ever.
> Regards
> Bob Harrison G-PTAG
>
> Robt.C.Harrison
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> <mailto:owner-europa-list-server@matronics.com>
> [mailto:owner-europa-list-server@matronics.com
> <mailto:owner-europa-list-server@matronics.com>] On Behalf Of R=E9mi
> Guerner
> Sent: 24 June 2007 09:56
> Subject: Europa-List: Tailplane flutter
>
> Hi all,
>
> The half inch play tolerance as specified by the factory means that, in
> a more than one degree range, the tailplanes are not balanced at all.
> This is a possible cause for flutter. I consider that any play in the
> chain between the mass balance arm and the tailplanes is unacceptable:
> that means zero play between TP4 and TP9 and zero play between TP 4 and
> TP12. The factory solution is Mod 62: replacement of the =BC=94 pins by
> 3/8=94
> pins. This mod is known to only delay, not eliminate, the problem. As
> far as I know, there are 3 solutions which have been implemented
> successfully by builders:
> - gluing TP9 and TP12 to TP4
> - replace the straight pins TP14C and TP14D by AN486 taper pins
> - replace the straight pins TP14C and TP14D by AN bolts
> As some builders have mentioned in this forum in the past, all these
> solutions have their own inconveniences and must be implemented
> carefully, but I believe these inconveniences are far outweighed by the
> safety of a fully balanced tailplane in all conditions.
> Regards
>
> Remi Guerner
> F-PGKL, XS S/N395 monowheel, 912S, Airmaster, 482 hours
>
> *
>
>
> *
--
Graham Singleton
Tel: +441629820187
Mob: +447739582005
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