REFLECTOR: Ailerons

[Velocity]

I agree with Larry  The Aileron trim does little to move the
ailerons on the ground but does have an effect in the air.
Mine stopped working in the air on my second fight I thought I had
to trim my wings to get the plane to fly straight and found the trim
motor was not working and was stuck a little off center and was causing
my constant turn. Glad I found this before I got real carried away with 
fixing
my straight and level fight.

Also I found putting a bung on the front of the sump tank
fixed my sump low light. It took a little work but I found I had to
really make sure the vent lines go as straight up as possible.
 I had a elbow coming out of the sump with the new vent on top
and I still had the same sump light issue. Removed elbow problem solved.



Ron


----- Original Message ----- 
From: "Laurence Coen" <lwcoen at hotmail.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Wednesday, December 28, 2011 11:16 AM
Subject: Re: REFLECTOR: Ailerons


> David,
>
> The aileron control linkages can't cause or prevent aileron flutter. 
> Ailerons that are not properly balanced will cause flutter.  Your ailerons 
> must be of a different design than mine.  Mine have a lower leading edge 
> that is the counter weight which is a 3/8" steel rod and thus no sharp 
> edges.  You have said that you rounded off the leading edge of your 
> aileron to prevent the "aileron snatch" that you were experiencing.  My 
> concern is that your ailerons are no longer balanced and that could lead 
> to flutter as you approach Vne.  I think it would be a good idea to 
> re-check the balance just to be sure.
>
> The friction you have noted is normal and in my experience has become less 
> with use.  It is also normal that the roll trim doesn't move the ailerons.
>
> Larry Coen
> N136LC
>
> --------------------------------------------------
> From: "David Ullman" <ullman at robustdecisions.com>
> Sent: Monday, December 26, 2011 12:07 PM
> To: <reflector at tvbf.org>
> Subject: Re: REFLECTOR: Ailerons
>
>> I am still struggling with the ailerons.  Scott has spent much time on 
>> the
>> phone with me and I appreciate this factory support.  I have torn out the
>> push pull cables and rerouted them making the angle to the control horns
>> near 90deg and relaxing radius of the cable bend.  I have virtually no 
>> slop
>> in the system .  The trim system still cant move them and there is still
>> more friction than I would like on the stick.  It is much, much less than
>> when I started and a flight test will tell if this is good enough(my test
>> pilot is on vacation).  Any other ideas are appreciated or comments on
>> aileron stiffness.
>>
>> One problem came out that I haven't fixed is that I have aluminum torque
>> tubes on the ailerons.  These came with the kit.  The factory now uses
>> steel.  I calculated the difference in stiffness between a .035 steel and
>> the .06 aluminum tube and it is a factor of 2.0  Statically, I don't 
>> think
>> that a pilot could feel the difference in the resulting stiffness.  But, 
>> my
>> test pilot is worried about flutter.  He has experienced this twice in 
>> Reno
>> racer development and both had aluminum torque tubes. Should I swap these
>> out before it flies again., or can it wait until I take the plane apart 
>> for
>> painting in a year?
>>
>> Happy new year to all and I may get to fly in 2012 (I said that last year
>> also).
>>
>> David Ullman
>> N-444DX Velocity
>> EAA 292 President
>> david at davidullman.com
>> 541-754-3609
>>
>> **************
>>
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