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1. 06:47 AM - Re: Re: Autopilot Servos (William Daniell)
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| Subject: | 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 thi
s any
> longer as taller passengers tended to dislike this loss of foot room as i
t
> puts their knees higher than comfortable while flying along. OK for thos
e
> 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 in
> the cockpit. Strive for the 60-61 inch empty weight CG. You=99ll
have to
> keep the panel light. These are very long servos also, so in a crash, ju
st
> 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) ar
e
> 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 pus
h
> 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 install
ed
> 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 simpl
e
> metal plate of .060 aluminum and four nut plates to the face of the inboa
rd
> seat hole. Attach the servo to it. Make an arm and attachment bracket f
or
> 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 tho
se
> 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. T
he
> limit arms typically allow 45 degrees of movement max. Why use 45 degree
s
> 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 to
a
> full throw of less than 30 degrees.
>
> I have better drawings in my archives, but it will be a while to get them
> 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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