REFLECTOR: Century 2000 Autopilot

[Steve]

I have the same Auto Pilot. I think the Century has difficulty 
overcoming the Velocity pitch trim arrangement (its very stiff).

I was thinking about changing the pitch servo geometry to give the 
Century a bit more mechanical advantage.
This is all on hold whilst I replace the engine.

Steve

Sandy & Spike Duncan wrote:

> I am having a problem with my Century 2000 Autopilot with Trim 
> Prompter in my XLRG.  Other connected equipment includes Century HSI 
> NSD360A, UPS Apollo/Garmin SL30 and Apollo ACU.
>  
> The Century factory cannot find anything wrong in the Controller. 
>  
> The problem is shooting a coupled ILS approach.  The coupler on the GS 
> captures GS signal but will not stay on course.  Sometimes it deviates 
> low and sometimes high.
>  
> All other modes of the autopilot are good. LOC track, ALT Hold, Pitch 
> Modifier switches up/down all are good.  All wiring has been checked 
> correct with both Garmin and Century schematic diagrams.
>  
> Does anyone have this installation and does it work OK?  
>  
> Do you have any suggestions on what the problem might be?
>  
> Spike Duncan
> XL-RG
> IO-540 300 hp
> Almost 100 hours
>  
>
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