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Re: Europa-List: Re: Autopilot Servos

Subject: Re: Europa-List: Re: Autopilot Servos
From: William Daniell <wdaniell.longport@gmail.com>
Date: Mon, 23 Nov 2015 05:19:38
Excellent thanks.
Well as with everything else you change one thing and another challenge
appears.  The bridge i am putting over the rudder cables makes the
turnbuckles for adjusting the cables impossible to get at/adjust.  So I'll
have to move them.
One option would be to replace the cables with new, but before i do ....
It there an approved method replacing the turnbuckle with some sort of non
adjustable connection?
Thanks
Will
On Nov 21, 2015 8:20 PM, "Bud Yerly" <budyerly@msn.com> wrote:

> Will,
> The 3:2 is to give the servo a bit more more throw.  The pitch tube only
> moves about 1.25 inches which translates to a very small movement of the
> pitch servo arm.
> On the pitch servo in the rear, it takes a fairly high block or bridge.
> Just make it robust enough.  It=99s dimensions escape me as it vari
es by
> servo.  Depending on your servo choice and orientation, some fiddling is
> required to get it fairly level and yet clear the main tube and above all
,
> be serviceable.
>
> Just make sure the servo can never jam the flight control and is robustly
> attached to the airframe.
>
> Regards.
> Bud Yerly
>
> *From:* William Daniell <wdaniell.longport@gmail.com>
> *Sent:* Tuesday, November 17, 2015 9:45 AM
> *To:* europa-list@matronics.com
> *Subject:* Re: Europa-List: Re: Autopilot Servos
>
> Bud
>
> thanks
>
> sorry I didnt reply...on the road.
>
> Is there any reason for the 3:2 arm on option no2 for the pitch servo.
> Would it be possible just to build a "bridge" over the rudder wires to
> bring the servo up to the right level?
>
> Will
>
> William Daniell
> LONGPORT
> +57 310 295 0744
>
> On Mon, Nov 9, 2015 at 10:30 PM, Bud Yerly <budyerly@msn.com> wrote:
>
>> Will,
>> I=99m to blame for the install of servos under the passengers feet
.  I did
>> this in 1999 on 419PL when I started building it.  I don=99t do th
is any
>> longer as taller passengers tended to dislike this loss of foot room as 
it
>> puts their knees higher than comfortable while flying along.  OK for tho
se
>> who fly with their feet on the rudder pedals or are a standard sized 5
=99
>> 10=9D.  Also, these are heavy servos (Navaid, Blue Mountain, etc.)
 and weigh
>> about 5 pounds.  If you put the battery in the front, watch the weight i
n
>> the cockpit.  Strive for the 60-61 inch empty weight CG.   You=99l
l have to
>> keep the panel light.  These are very long servos also, so in a crash, j
ust
>> unscrew it and it makes an excellent club for survival.
>>
>> This setup under the feet also is a bit tough with the Garmin, Dynon,
>> TruTrack and GRT servos.  These light weight servos (about 2.5 pounds) a
re
>> very good also, plus they have a smaller footprint, but they are taller.
>> Reducing the foot well even more.
>>
>> Here are two other ideas I have used for quite some time.
>> 1st is a design I made to put the servo behind the baggage bay.  See the
>> drawing.  It is dumb simple.  It is a 3 to 2 arm on a bearing and two pu
sh
>> rods so as to allow the servo to move about 45 degrees.  Bob Berube and 
I
>> consulted on this and I have made it my standard for retrofits where the
>> only place to put the servo is behind the baggage bay.  It can be instal
led
>> after the top is on in a finished airplane by access through the D panel
.
>> It is not comfortable.
>>
>> In all my aircraft, the roll servo goes under the pax seat.  Make a
>> simple metal plate of .060 aluminum and four nut plates to the face of t
he
>> inboard seat hole.  Attach the servo to it.  Make an arm and attachment
>> bracket for the stick.  Fab a fiberglass cover to prevent the pax from
>> impacting the arm.
>>
>> 2nd is a simple extension to the stab tube attachment point and hook up.
>> Pretty simple, easy to bolt up if your plane has access panels which are
>> positioned properly.  I always have three access holes.
>> A 4 inch sight hole for the MAC trim servo, a 6 inch abeam the mass
>> balance arm as in the book.  I then put on the port side a single 6 inch
 to
>> access below the pitch push rod to stab tube attachment.  If you have th
ose
>> small Europa mandated sized holes for drug addicted anorexic maintainers
,
>> this may be painful to try unless installed during the build and access
>> holes are well planned.
>>
>> Always plan your servos so they cannot go over center and jam the
>> controls.  Many servos come with limit arms to prevent this, use them.  
The
>> limit arms typically allow 45 degrees of movement max.  Why use 45 degre
es
>> or close to that is to allow the servo to have a larger movement as the
>> clutches and servo settings do not work well when the servo is limited t
o a
>> full throw of less than 30 degrees.
>>
>> I have better drawings in my archives, but it will be a while to get the
m
>> as my servo was hit by lightning and fried so it needs to have its hard
>> drive recovered.
>>
>>
>>
>> [image: Autopilot Servo Attachment]
>> Just a thought as legroom in the Europa is at a premium.
>>
>> Regards,
>>
>> Bud Yerly
>> Custom Flight Creations, Inc.
>>
>>
>> *From:* William Daniell <wdaniell.longport@gmail.com>
>> *Sent:* Monday, November 09, 2015 4:05 PM
>> *To:* europa-list@matronics.com
>> *Subject:* Re: Europa-List: Re: Autopilot Servos
>>
>>
>> Excellent thanks.
>> Will
>> On Nov 6, 2015 1:16 PM, "Alfred Buess" <ykibuess@bluewin.ch> wrote:
>>
>>>
>>> William,
>>> Attached is a picture of the Navaid Autopilot servo mounted on the
>>> passenger side footwell of my Europa. Pretty simple installation.
>>> Regards, Alfred
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=448888#448888
>>>
>>>
>>>
>>>
>>> Attachments:
>>>
>>> http://forums.matronics.com//files/navaid_servo_151.jpg
>>>
>>>
>>>
>>>
>>> ==========
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>


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