REFLECTOR: Roll trim mod suggestions

[Brian Michalk]

A clutch of some sort would be a really good idea.  I don't think it 
needs to be electric, just set at a spring loaded torque value.  I have 
an electric one, but with some digging could probably source one that's 
small and lightweight.

On 12/10/2013 8:51 PM, Don Johnston wrote:
> Requesting suggestions from the hive mind...
>
> After hearing all the comments about the stock roll trim slipping, I 
> decided that I would go another way. When I saw Geoff's solution, I 
> felt it was perfect.
>
> Except he has a motor with a .25" shaft where mine is 5/16". The 
> pulleys for the 5/16" shafts are only available in a larger diameter 
> and that caused interference issues with the aileron torque-tube 
> bellcrank and cables.
>
> So I decided to go with a system similar to what is in my Cessna. 
> Chains!  Absolutely no slipping with chains. And it works great. 
> Positive motion and no slipping. In fact, it will pull the spring 
> around the pulley. Which causes it to derail and get caught in the 
> bellcrank. :-(
>
> I'm wondering if anyone has any suggestions on how to put in a 
> (simple) motion limiting mechanism. It would have to be on the motor 
> or chain. My first thought was microswitches that reverse the motor 
> direction. But I cant' figure out how to trigger the switches.
>
> Don
>
>
>
>
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