Bud, Will, I have attached a couple of drawings and a picture of the UK
mod application for the scheme that Bud described FYI
Nigel
On 13/04/2015 20:39, Bud Yerly wrote:
> 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 silicone cowl seal in the tube and clamp it on. I prefer this if
> there is no access in the aft end.
>
> Bud
>
> /Sent from my Verizon Wireless 4G LTE DROID/
> On Apr 12, 2015 10:18 PM, 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, Apr 12, 2015 at 9:02 PM, Bud Yerly <budyerly@msn.com
> <mailto:budyerly@msn.com>> wrote:
>
> Alan,
> Nice clean job.
> I prefer not to run a thin wall one inch tube that far without an
> idler in 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 capable of taking the
> load plus a rather large safety factor (since it is a control
> 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 extension 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 the aileron tubes). The length
> of the tube should be about 2 feet.
> Regards,
> Bud Yerly
> *From:* Alain Chabert <mailto:alainchabert@wanadoo.fr>
> *Sent:* Saturday, April 11, 2015 1:05 PM
> *To:* europa-list@matronics.com <mailto: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 the proposed mod.
> Regards
>
> *Alain CHABERT*
>
>
> __
> Le 11/04/2015 18:44, William Daniell a crit :
>> 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
>> *
>>
>>
>> *
>
> *
>
> arget="_blank">http://www.matronics.com/Navigator?Europa-List
> tp://forums.matronics.com
> _blank">http://www.matronics.com/contribution
>
> *
>
>
> *
>
> >http://www.matronics.com/Navigator?Europa-List
> onics.com
> ww.matronics.com/contribution
>
> *
> *
>
>
> *
|