REFLECTOR: Results (control Stick)

[Brian Michalk]

I think our torque tube design causes problems with trying to get book 
numbers for control surface deflection limits.

I recently re-rigged my plane, and believe that the torque tube where 
the stick is mounted flexes too much.  Also, since the stick is mounted 
offset to the torque tube, then full right deflection has a different 
geometry than full left.  If everything was cut symmetrical, it's much 
easier to get full left deflection because the stick rises out of the 
keel cutout, and lowers into the keel for a right deflection.

When the ailerons hit their limits, or if they are loaded up in the air, 
then the torque tube will flex, resulting in the stick hitting the 
cutout before reaching full deflection of the control surfaces.

Is this that big of a problem?  In the air, I don't think so, but on the 
ground, it's impossible to get a positive crisp response of surfaces 
moving with minor stick inputs.

If I were inclined to "fix" this, I would make a new stick through which 
the aileron torque tube passes.  Then, relocate the torque tube to be 
centered in the keel.  Not difficult really, just modify one bracket, 
and the keel stiffener hole location.  I would also put another bracket, 
or perhaps another "keel stiffener" type of arrangement to keep the 
torque tube from flexing at the point where the stick is attached.


On 2/24/2012 9:44 AM, Ron N Velocity XLFG wrote:
> Been a long time since I did this . As I remember there is a bearing 
> in the Torque tube to keep
> it Perpendicular. I just put a the bolt through the stick hole and 
> through the Torque tube hole and tightened
> them together with the washes between them  Then made may casting.
> Ron
>
>     ----- Original Message -----
>     *From:* John Dibble <mailto:aminetech at bluefrog.com>
>     *To:* Ron N Velocity XLFG <mailto:VelocityXL at fastmail.fm> ;
>     Velocity Aircraft Owners and Builders list
>     <mailto:reflector at tvbf.org>
>     *Sent:* Friday, February 24, 2012 8:35 AM
>     *Subject:* Re: REFLECTOR: Results (control Stick)
>
>     That's a simple method.  How did you assure the washers are
>     perfectly perpendicular to the bolt?  I rubbed my surfaces with a
>     carbon motor brush.  That gave it a slippery feel.
>
>     John
>
>     On 2/24/2012 8:19 AM, Ron N Velocity XLFG wrote:
>>     Now that I am fling I would say that I really like the results of
>>     this modification. The only change I did
>>     was to use one Brass washer and one Stainless steel washer to
>>     provide a better bearing surface.
>>     Dissimilar materials helps to prevent galling. Really stiffed up
>>     the stick.
>>
>>
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