REFLECTOR: Roll trim mod suggestions

[Brian Michalk]

If one were to use a chain, would this slip clutch fit in the available 
space?

On 12/12/2013 10:06 AM, Ron N VelocityXLFG wrote:
> Got my belt and pulleys here
>
> http://www.mcmaster.com/#timing-belt-pulleys/=prz4ya
>
>
>
> On 12/11/2013 5:27 PM, Don Johnston wrote:
>> Thanks for the replies!
>>
>> I thought about a limiting cable that would prevent the motor from 
>> rotating.  But making sure it was strong enough and making sure it 
>> didn't cause a problem in "slack" mode was problematic.
>>
>> The clutch is an interesting approach. But the cost and space made 
>> that a non-starter.
>>
>> So I've removed the parts and ordered the smallest timing pulley I 
>> could find with a .25" bore.  I'll open it to 5/16" and try that. The 
>> nice thing about the timing belt is that you can control how much 
>> slippage is allowed with spring tension.
>>
>> Thanks again,
>> Don
>>
>>
>> On Wed, Dec 11, 2013 at 4:58 PM, Brian Michalk <michalk at awpi.com 
>> <mailto:michalk at awpi.com>> wrote:
>>
>>     Something like this:
>>
>>     http://www.reell.com/catalog/index.php?main_page=product_info&cPath=5&products_id=37
>>
>>
>>
>>
>>     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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