REFLECTOR: Autopilot servos

[Geoff Gerhardt]

Scott/John,

After playing with it a bit, and enabling altitude hold on the Dynon, I see
that it give messages to trim.  Also, I ran the test procedure again with
the trim adjusted right in the middle, the AP ran the pitch servo up and
down over the relatively small range it uses to test successfully, so I
think its functioning normal.  I'll post on the Dynon support forum just to
check, tho.  Thanks.

Looking fwd to Oshkosh - hoping to be flying there next year.

Geoff

On Sat, May 28, 2011 at 10:13 AM, Scott Derrick <scott at tnstaafl.net> wrote:

>  My Century AP asks me to adjust trim when the flight conditions change.
> There is no way the AP is going to overpower the trim spring and flight
> loads.
>
> Your training the AP as to how far it "can" move. Not testing its muscle.
>
> I think its functioning normally but a call to Dynon may be in order.
>
> Scott
>
>
>
>
> -------- Original Message --------
> Subject: REFLECTOR: Autopilot servos
> From: Geoff Gerhardt <geoff at thegerhardts.com> <geoff at thegerhardts.com>
> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org><reflector at tvbf.org>
> Date: 05/28/2011 05:31 AM
>
> Hi all,
>
>  I installed my pitch autopilot servo and powered up my Dynon Skyview to
> get it calibrated.  The calibration process has you move the pitch to its
> extremes to set the endpoints.  Once calibrated, it tests the servo.  I have
> the Strong Pitch trim installed, so it takes quite a lot of force to
> overcome the pitch trim (not sure if this is similar to the factory trim
> system).  Only with my help on the stick can the autopilot servo go to the
> extremes - is that normal?  Is it expected that the pilot will keep
> adjusting the pitch while on AP so the servo doesn't have to work too hard?
>  Or, should I put a longer lever arm on the servo to increase the torque it
> can deliver?
>
>  Thanks.
>
> Geoff
>
>
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