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>
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] 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
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