Hi James,
I don't have any pics of my other installation on hand but will send you
one tonight (EST). Basically I just took one of these:
http://www.aircraftspruce.ca/catalog/elpages/ractrimservos2.php and on
the end of the actuator attached one end of an open-ended composite
horseshoe with a bolt/pin to provide a 'hinge'. The other end of the
horseshoe is attached again with a bolt-hinge to the control tube providing
a push/pull via a clamp or bracket. Alternatively it could also be attached
to the control system via a clamped-on-arm to rotate aileron tube under the
seat (not having done a Europa install I don't have the specific
installation details figured out yet). The spring rate can easily be
adjusted by incrementally adding layups (I love 'glass :-)
The spring in my other lil'l homebuilt (not glass :-( ) has more than
adequate spring force over the 1.2" of travel of the servo, but less than
the servo's spec'd limit. One has to consider the alignment carefully to
minimize any side loads on the servo.
hth's,
Cheers,
Pete
On Tue, Dec 10, 2013 at 6:37 AM, James Kelly <europajimkelly@gmail.com>wrote:
> Hi Pete,
> Would you be kind enough to explain your system to the
> uninitiated in detail.
> Thanks Jim G-BWEG
>
>
> On Tuesday, December 10, 2013, Peter Zutrauen wrote:
>
>> fwiw, my choice of sol'n is a Mac servo (purchased from ACS)* hidden* in
>> the cockpit module, driving a very simply laid-up composite horseshoe
>> spring. Complies with the std aviation paradigm of controlling and
>> indicating, and no wires/composite/connectivity work in the wing.
>>
>> I have this setup in my other homebuilt for pitch trim and it works a
>> treat.
>>
>> Cheers,
>> Pete
>> A239
>>
>>
>>
>> On Tue, Dec 10, 2013 at 5:41 AM, Alan Carter <alancarteresq@onetel.net>wrote:
>>
>>> alancarteresq@onetel.net>
>>>
>>> Hi ALL.
>>> No nothing about physics, I am sure all the ways suggested work, nice
>>> and simple, but maybe a little crude , however I like simple solutions but
>>> many C of A aeroplane have moving aileron trim tabs, and a little plastic
>>> tear drop with An AA battery and radio controlled servo hitched up to
>>> plastic tab, and a radio remote in the cockpit.
>>> If we had a radio controlled model make out there, he could knock up a
>>> few and sell them on the forum,
>>> I made a fan unit for the top of the dash, maybe not quit as neat as the
>>> ones actually shaped into the the top of the panel, but I would say pretty
>>> close, and all I needed was an oblong hole , job done, I could have made
>>> several, just like the torque tube clamps are rolled out. We need a radio
>>> model plane maker to run up a few.
>>> regards.
>>> Alan
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=415301#415301
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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