REFLECTOR: Longer Ailerons trailing edge thickness and vortex generators

[Scott Baker]

Alan Shaw (Wingco) provided 7' long ailerons on Wingco wings. I personally could not see any benefit in slow flight performance compared to 6' long ailerons. 

Scott Baker

On May 30, 2012, at 10:57 AM, "Ron VelocityXLFG" <velocityxl at fastmail.fm> wrote:

> Any one made their ailerons longer  to give them more authority ?
> Seems like a simple change to aid in low and slow fling. I use simple
> rather care free but you get what I mean.
> 
> Ron
> 
> -----Original Message----- From: Scott Derrick
> Sent: Wednesday, May 30, 2012 8:13 AM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: trailing edge thickness and vortex generators
> 
> My ailerons TE are about 1/8 inch, never had snatch problems.
> 
> I've been running VG's for years and love um. I don't think they are
> ugly.  No more than the Vortilons.
> 
> MY only complaint is you have to be a bit more careful around then when
> washing the plane. The loss of top speed is negligible, I'd say less
> than 2 knots, but it will depend on how correctly they are installed.
> 
> The benefit of better lift, lower main wing and canard stall, and better
> low speed aileron effectives far out weigh the negatives.
> 
> Scott
> 
> 
> -------- Original Message --------
> Subject: Re: REFLECTOR: trailing edge thickness and vortex generators
> From: David Ullman <ullman at robustdecisions.com>
> To: reflector at tvbf.org
> Date: 05/29/2012 09:16 PM
> 
>> Testing is going well.  I have about 10 hours + the test pilot's 10 hours,
>> so about half way through the fourty hours.  Crummy weather last week so I
>> put in the Dynon autopilot servos.  I have only tested them on the ground so
>> far.  Weather nice this week, but am at the beach with wife - need to keep
>> her happy.
>> 
>> On Monday, I was flew to a Memorial day event with the Velo and a very
>> knowledgeable guy (owns the company that makes the Venture (Questair) )
>> commented on the sharpness of the trailing edge of my ailerons.  As you may
>> remember, my plane had bad aileron snatch.  I fixed this in four ways 1) gap
>> seal, 2) rounding the front of the lower counterbalance, 3) rigging both
>> ailerons slightly up and 4) adding vortex generators to both the canard and
>> the wing.  The TEs were very sharp and are now about 1/8" thick.  The plane
>> flys very well now.
>> 
>> I would like to get rid of the VGs (ugly, slices people who touch the plane
>> (not all bad, but the blood is messy) and eats some speed).  Alan Tolle (the
>> Venture guy) said the TEs should be about 1/4 and any thinner is inviting
>> snatch.  So, I am wondering, can get rid of the VGs if I fatten the TE of
>> the Ailerons and still have the good handling I currently enjoy?
>> 
>> Any knowledge on this?
>> 
>> David Ullman
>> N444DX
>> President EAA 292
>> 541-754-3609
>> david at davidullman.com
>> 
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> 
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