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Europa-List: Trim through a Dynon AP-74 panel

Subject: Europa-List: Trim through a Dynon AP-74 panel
From: Martin Tuck <MJKTuck@cs.com>
Date: Tue, 8 Oct 2019 16:38:11

For those that have gone before me, I have installed a Dynon Skyview 
SP-AP(Autopilot)-Panel but have yet to rig up the servos yet for 
autopilot functionality.

I have wired up the standard Europa provided Ray Allen trim circuit that 
I have had for years through the unit though and turned everything on 
today to see if the trim still worked (you still use the old trim switch 
for trim) and correctly oriented.

The Ray Allen trim switch is a momentary switch and normally pushing the 
switch for either up or down trim will run the tail mounted trim servo 
and releasing it will stop it. I have wired up a 'kill switch' in case 
the switch gets stuck but have never had to use it. :-).

However, now that I have wired it through the Dynon unit, carefully 
following the wiring diagram, the switch will run the servo correctly 
but it does not stop when you release the switch. The only way to stop 
it is to 'dab' the switch for opposite trim, then it will stop. It is 
like the switch tells the Dynon panel to power the trim servo and it 
provides power until you command a momentary opposite command.

I'm interested to know if anyone else has run into this and what the 
solution is. To me a momentary switch should be just that.

Thoughts?

Regards,

Martin Tuck



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