REFLECTOR: Symantec confusion

[Laurence Coen]

Lift is proportional to AOA and drag is proportional to lift.


From: Lawrence Epstein 
Sent: Sunday, December 04, 2011 6:48 PM
To: Velocity Aircraft Owners and Builders list 
Subject: Re: REFLECTOR: Symantec confusion


Drag is proportional to to lift, not AOA.


On Sun, Dec 4, 2011 at 1:39 PM, <aminetech at bluefrog.com> wrote:

  Larry,

  I was thinking something similar, except that ailerons up would push the back of the wing down and/or reduce lift, either of which would INCREASE the AOA. In turn, requiring more up elevator(down trim), increasing drag.
  I went to the hangar today and measured the play in my ailerons by clamping one even with the wing. The other was ½” up and I measured 1/8” play (further up). With more force I got another 1/16”, but I don’t think that was play.
  Seems to me that what to avoid is the ailerons moving between the up and down positions by play alone. In that regard, I could reduce mine to just 1/8” up and see if there is any benefit. Anyone see anything wrong with that?

  John

  --- ljepstein at hotmail.com wrote:

  From: Lawrence Epstein <ljepstein at hotmail.com>
  To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
  Subject: Re: REFLECTOR: Symantec confusion
  Date: Sat, 3 Dec 2011 23:22:39 -0500

  Pretty sure that Ailerons that are slightly up in flight decrease the net AOA of the wing, therefore decreasing lift and therefore decrease drag.

  Larry Epstein


  On Sat, Dec 3, 2011 at 2:05 PM, Laurence Coen <lwcoen at hotmail.com> wrote:

    Aileron snatch, Dutch roll and adverse yaw are three separate and distinct things.  Google "Dutch roll" and and get your terms straight.  Aileron droop on a Velocity is to compensate for slop in the control system.  In flight the ailerons should be in neutral.  Air foils that droop in flight are called "flaps" and are retracted in cruise.  Gliders have air foils that stick up to kill lift.  A Velocity is neither a glider or does it have flaps.  Aileron snatch is where aileron control is "snatched" away from the pilot in an un-commanded moment.

    Larry Coen
    N136LC

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