REFLECTOR: Droop.

Laurence Coen lwcoen at hotmail.com
Sun Dec 4 13:59:34 CST 2011


Lou,

The first part of what I said refers to aircraft in general but the 1/8" droop was recommended for the STD.  Since the XL is bigger and heaver it might require more.  Ask the factory because I don't know.

Larry Coen
N136LC


From: Lou Stedman 
Sent: Sunday, December 04, 2011 1:36 PM
To: Velocity Aircraft Owners and Builders list 
Subject: Re: REFLECTOR: Symantec confusion


Does this apply to all Velocity wings, old and new. Is it for just XL or does this apply to early model STD?

From: Laurence Coen 
Sent: Sunday, December 04, 2011 1:50 PM
To: Velocity Aircraft Owners and Builders list 
Subject: Re: REFLECTOR: Symantec confusion

Larry,

That's correct, but think about this.  If your plane weighs 2000 pounds you need 2000 pounds of lift to stay in the air so reducing lift to reduce drag doesn't work.  You can't get something for nothing.  Getting back to basics, ailerons are a moveable part of the wing.  If you check other aircraft you will find that the ailerons aren't sticking up or down but are aligned with the trailing edge of the wing.  Since the wing's sole purpose is to produce lift and the ailerons are part of the wing, they too are supposed to produce lift in level flight.  If they are up or down they will represent edges in the air flow and produce parasitic drag.  Once again, the 1/8" droop on the ground is there so that the ailerons will align with the trailing edge in flight.

Larry Coen
N136LC

From: Lawrence Epstein 
Sent: Saturday, December 03, 2011 10:22 PM
To: Velocity Aircraft Owners and Builders list 
Subject: Re: REFLECTOR: Symantec confusion

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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