Bud
Does this mean that you put a clamp on the main torque tube?
Will
William Daniell
LONGPORT
+57 310 295 0744
On Sun, Apr 12, 2015 at 9:02 PM, Bud Yerly <budyerly@msn.com> wrote:
> Alan,
> Nice clean job.
> I prefer not to run a thin wall one inch tube that far without an idler i
n
> the center. However, the pitch system only needs a couple of pounds of
> pressure when out of trim, and when the stab is trimmed neutral, very
> little pressure is necessary to move the stab. We design our systems for
> the worse case scenario, that is, full trim up the the max torque of the
> trim motor and the bending moment of the thin wall tubing has to be capab
le
> of taking the load plus a rather large safety factor (since it is a contr
ol
> system) without bending or flexing. If the trim tube should bend, it can
> jamb the flight control.
>
> I prefer to put the trim motor where you did, but make a 3/2 ratio arm to
> drive the tube via a tube clamp.
>
> However, to keep a short drive tube, I would recommend installing the new
> light weight servos behind the mass balance post using a two inch extensi
on
> from the torque tube arm (there are two holes there anyway to mount .016
> steel arms to). Use a 1/2 inch with .049 wall for the drive tube (like t
he
> aileron tubes). The length of the tube should be about 2 feet.
>
> Regards,
> Bud Yerly
>
> *From:* Alain Chabert <alainchabert@wanadoo.fr>
> *Sent:* Saturday, April 11, 2015 1:05 PM
> *To:* europa-list@matronics.com
> *Subject:* Re: Europa-List: Autopilot servo instalation
>
> Hello,
> Look at the solution I adopted from 330 hours and is much simpler than th
e
> proposed mod.
> Regards
>
> *Alain CHABERT*
>
>
> Le 11/04/2015 18:44, William Daniell a =C3=A9crit :
>
> I have seen searching through the list that there are some alternatives
> to the major surgery required for Mod 75 and 76.
>
> For example I saw some correspondence between Raimo and Bob Gowing
> connecting servo to the tail plane torque tube using a bracket. I assume
> that the service is mounted on a fiberglass bracket mounted on the floor
> ....
>
> Could I prevail on anyone who has who has an alternative to the official
> mods and which does not require major surgery send me a pic please.
>
> Many thanks
>
> Will
>
>
> William Daniell
> LONGPORT
> +57 310 295 0744
>
>
> *
>
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