I elected to go with a homemade single composite horseshoe spring on the
end of a mac servo (jack-screw model) - very easy to adjust the spring rate
to one's liking..... just add/remove plies accordingly, and less chance of
breakage fowling the controls imho :-) ..... & nope not on my Europa :-(
[image: image.jpeg]
On Tue, Dec 10, 2013 at 6:20 PM, Bud Yerly <budyerly@msn.com> wrote:
> Photo E-mail View slideshow | Download images
> About easy trims.
> If it can go wrong, it will, and the more complex and wonderful, the more
> chance for extensive troubleshooting problems.
>
> I prefer a built in aileron tab into the aileron with the servo attached
> and aileron balanced. Looks and operates well. a 10x1.5 inch tab will
> trim off any load and only deflect a very small amount keeping drag to a
> minimum. However in an aircraft with completed and painted surfaces I ha
ve
> used a spring system.
>
> I usually try to find easy ways to make dumb simple, bullet proof control
> systems that can't be goofed up.
>
> Here is an item I designed, built and installed on a customers aircraft.
> It uses a simple spring set on either side of the stick with a mac servo
to
> pull left and right on one side and the other side has a simple bolt up
> system. The servo can be replaced by a screw or lever system with a
> locking ratcheted lever. The bracket on the stick is .060 minimum 6061 T
6
> bent on the grain. I normally install autopilots in our aircraft and the
> roll servo goes under the seat or in the tunnel and attaches to the brack
et
> also. The trick is getting the spring and servo arm both attached. Brea
k
> out the OR spacers on hand and nuts, bolts, washers and patience.
>
> The spring rate is the tough part. Don't get it too tight or it stiffen
s
> the stick too much. At the base of the stick cradle, you only need about
1
> pound per inch max to trim a well rigged aircraft. I prefer springs that
> are 3 inches long. Use any length you want but make sure the extensions
> and hardware combination you use to attach to the servo or lever cannot
> bind. Without a trim servo motor or autopilot servo it is very simple to
> do. Autopilot servos have no trouble with the system.
>
> The next item that this requires is a simple fiberglass box cover so you
> can't step on it... 3 layers of bid with a Reduxed angle on the floor an
d
> seat front keeps the cover set in place, but I glass or bolt in the
> attachment brackets to assure that if stepped on it doesn't move.
> Obviously the cover has to have a U in the center to clear the stick.
>
> I don't have photo's as they are the property of my customers, but it is
> pretty simple. I prefer not to have an autopilot so that simplifies the
> trim. Works too.
>
> Regards,
> Bud Yerly
>
>
> ----- Original Message -----
> *From:* William Daniell <wdaniell.longport@gmail.com>
> *To:* europa-list@matronics.com
> *Sent:* Tuesday, December 10, 2013 2:21 PM
> *Subject:* RE: Europa-List: Re: One wing Low
>
> I would be cautious about any radio controlled =EDtem.as<http://xn--tem-
qma.as>I recall they they work on common frequencies. When you are flying
a radio
> controlled aircraft you have to ensure that all flyers are on different
> frequencies and everyone has a little banner to indicate what frequency
> they are using.
>
> Will
>
>
> *From:* owner-europa-list-server@matronics.com [mailto:
> owner-europa-list-server@matronics.com] *On Behalf Of *
> rparigor@suffolk.lib.ny.us
> *Sent:* Tuesday, December 10, 2013 13:13
> *To:* Europa
> *Subject:* Re: Europa-List: Re: One wing Low
>
>
> Hi Alan
>
> You could probably go blue tooth for control, just use your smart phone.
I
> installed a Ray Allen servo in my aileron with the top being flush with t
he
> top and the control horn exits the bottom. I have it controlling a piece
of
> hinge on the trail edge of the aileron. Not a great shot, left aileron,
> view in 600 you can see the bottom of aileron:
>
> http://www.europaowners.org/main.php?g2_itemId=27605&g2_imageViewsIndex
=1
>
> Don't forget you need to balance the aileron after you fool with it. I
> don't know how keen I would be to use a Lithium Polymer battery. For
> capacity, cheap, readily available and a very low self discharge, I would
> go with a quality alkaline. keeping them it as far forward as you can.
> Tungsten is heavier than lead, so you could try and find foam plugs in yo
ur
> balancing arms, or just drill and insert rods of tungsten (unless you can
> locate some depleted uranium rods surrounded with stainless steel). Put
a
> switch that is easily accessible to turn it off and some sort of battery
> indication you can check on your pre-flight.
>
> I know Steve D. was fooling with altitude hold:
>
> http://www.europaowners.org/main.php?g2_itemId=24893
>
> Wonder if they make wing leveling too? Hmm, if you made a minimalist wing
> leveling tab, you could just leave it on wing level all the time when
> flying, it would always try to keep wings level, then when you want to
> bank, you could easily over ride it!
>
>
> Ron Parigoris
>
>
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