REFLECTOR: Roll trim mod suggestions

[Ron N VelocityXLFG]

I changed mine after several flights, it did not seem to be working as 
well as yours. I also figured many people in velocitys have auto pilot 
in there plane and
that is why there has been little need to change something that is so 
lightly used . On  mine if had a run away problem  it would  be a 
nuisance but can easily be over rode.

I will try the dynamic brake any way as the  gear reduction put a 
significant  drag on the movement and my hope is with the dynamic brake 
it will be just enough to lock it in place.

With that said I would also say Velocity aircraft does a great job on 
there kits . The amount of information  and instructions have been 
great. I have done very little to change the kits
build process as the plans seem much better than I could have ever 
done.  Nice job VelocityAircraft.com

My 2 cents

Ron

On 12/11/2013 12:42 AM, Brooke Wolf wrote:
> Don
>
> I have the factory setup on mine and it is not a problem.  The string 
> and pulley system may seem a little cheesy but, surprisingly,  it 
> works.  I too was concerned about its utility.  On the ground, without 
> air loads, it seemed to slip quite a bit.  The only thing I did 
> different during the build was to coat the string with  a little belt 
> dressing.  It still slipped (on the ground).  I haven't touched it 
> since.  It works just fine in the air.  Frankly, since beginning 
> flight, I haven't given it much thought.  It is just not an issue.  I 
> trim subconsciously in both roll and vertical modes with the standard 
> "coolie hat" switch.  Somehow without thinking about it, the airplane 
> stays trimmed in both modes.
>
> BTW,  the check is in the mail.  Thanks
>
> Brooke
>
>
>>
>>   1.  Roll trim mod suggestions (Don Johnston)
>>
>> *From: *Don Johnston <numa at comcast.net <mailto:numa at comcast.net>>
>> *Subject: **REFLECTOR: Roll trim mod suggestions*
>> *Date: *December 10, 2013 at 9:51:58 PM EST
>> *To: *"reflector at tvbf.org <mailto:reflector at tvbf.org>" 
>> <reflector at tvbf.org <mailto:reflector at tvbf.org>>
>> *Reply-To: *Velocity Aircraft Owners and Builders list 
>> <reflector at tvbf.org <mailto:reflector at tvbf.org>>
>>
>>
>> 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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