REFLECTOR: Another Velo in the air

[Mark Magee]

John/All,
Just to clarify: both ailerons should be down 1/8" from the wings trailing edge, with the stick in neutral position. Mine are currently aligned with the wing trailing edge.

Mark B. Magee
Sent from IPhone 4

On Dec 1, 2011, at 6:49 AM, "John Abraham" <john at velocityaircraft.com> wrote:

> Dave,
>  
> SE and XL’s should have ailerons drooped 1/8” down.  What your pilot was experiencing was the leading edge of the ailerons grabbing the air and pulling on the stick.  You can’t find the centering point very well with this.  The other thing to look at is if the leading edge has any sharp edges on it.  You want the leading edge to be rounded so it doesn’t grab the air.
>  
> John
>  
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Dennis Martin
> Sent: Wednesday, November 30, 2011 10:54 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Another Velo in the air
>  
> I hired John Abraham, Velocity Chief Pilot, to conduct my first flights. He and I spent a couple hours doing fine tuning on the aileron and elevator rigging. I think you should talk with John about your dutch roll and any fine tuning you might do to make sure the ailerons are rigged properly. I also had some nose wheel shimmy - we kept tightening the castle nut until it went away. We went well past the 15 lbs recommended - perhaps as much as 20-25 lbs. on my fixed gear.
> 
> Good luck - I'm sure the factory team can help you figure it out.
> 
> Dennis
> 
> 
> 
> On Wed, Nov 30, 2011 at 8:42 PM, David Ullman <ullman at robustdecisions.com> wrote:
> N-444DX, an SEFG took to the air for its first flight today after 5+ years
> of work.  With Jorge Bujanda's flight,  that makes two planes this week.  I
> hired a test pilot, Robin Reid (30,000+ hours in over 300 types of aircraft,
> owner of a VarEZ for 5 years, and he flew a Velocity (Thanks Mel Rudin) just
> two weeks ago) and I am glad I did.  Most everything worked well which was a
> relief since I had been concerned about the engine that I built from a
> basket case, brakes heating, and nose wheel shimmy, but none of these were a
> problem.  But,I do seem to have a roll control problem that I will work out
> over the next couple of days (starting with a call to Velocity tomorrow AM).
> 
> 
> It seems that right after take-off Robin experienced a severe Dutch roll
> problem whenever he input any aileron control.  This seemed to increase with
> speed so he went around a big circle with rudder only and the ailerons
> locked neutral. He kept the speed under 120kts and landed at about 100kts.
> After taxiing it bask to the hangar I measured the following:
> 
> If I push down and let go, both ailerons fare even with the wings.
> If I push up on one, it will stay up due to friction about .35" above the
> wing when the other is even with its wing.
> If I push up hard on one I can flex it to .550"
> 
> The reason for this test is the thought that the air loads are pushing them
> both up, but this does not explain the Dutch roll (maybe?).
> 
> I measured the incidence of both wings at five different locations with an
> angle measuring device and found that most values were within a degree of
> each other (within the tolerance of the device).
> 
> I had a colleague put a resisting force on the ailerons and moved the
> control stick and all seemed normal.
> 
> One thing I haven't checked is the gap between the wing and the aileron.
> This was on spec early on, but there has been paint and other finishing
> since then.  I will measure that tomorrow.
> 
> Anyone else have a Dutch Roll problem?  I am calling Velocity tomorrow AM to
> get their input on this, but other ideas are more than welcome.
> 
> David Ullman
> N-444DX Velocity
> EAA 292 President
> david at davidullman.com
> 541-754-3609
> 
> 
> _______________________________________________
> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
> 
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
> 
> 
> 
> -- 
> All the best,
> Dennis
> _______________________________________________
> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
> 
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20111202/57f69d38/attachment.htm>