Yep. Bob Berube first showed me and it is simple. I use 2 in tube cut in
half with a drove lug or post welded on for MW-4 attached. Put 3/32 silico
ne cowl seal in the tube and clamp it on. I prefer this if there is no acc
ess in the aft end.
Bud
Sent from my Verizon Wireless 4G LTE DROID
On Apr 12=2C 2015 10:18 PM=2C William Daniell <wdaniell.longport@gmail.com>
wrote:
Bud
Does this mean that you put a clamp on the main torque tube?
Will
William Daniell
LONGPORT
+57 310 295 0744
On Sun=2C Apr 12=2C 2015 at 9:02 PM=2C Bud Yerly <budyerly@msn.com> wrote:
> Alan=2C
> Nice clean job.
> I prefer not to run a thin wall one inch tube that far without an idler i
n
> the center. However=2C the pitch system only needs a couple of pounds of
> pressure when out of trim=2C and when the stab is trimmed neutral=2C very
> little pressure is necessary to move the stab. We design our systems for
> the worse case scenario=2C that is=2C 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=2C it c
an
> jamb the flight control.
>
> I prefer to put the trim motor where you did=2C but make a 3/2 ratio arm
to
> drive the tube via a tube clamp.
>
> However=2C to keep a short drive tube=2C 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=2C
> Bud Yerly
>
> *From:* Alain Chabert <alainchabert@wanadoo.fr>
> *Sent:* Saturday=2C April 11=2C 2015 1:05 PM
> *To:* europa-list@matronics.com
> *Subject:* Re: Europa-List: Autopilot servo instalation
>
> Hello=2C
> 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=2C 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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