REFLECTOR: elevator cuff was Brake authority

[Laurence Coen]

Al,

The way I understand it, the elevator cuffs were one of three things done to address the deep stall problem.  Your current main wing was redesigned and the canard was shortened.  The cuffs are no longer needed.  They were a modification for existing Velocities at that time.  I received cuffs with my kit but never installed them.  Their purpose is to increase the stall speed of the elevator which would explain your high stall speed.

Larry Coen
N136LC
  ----- Original Message ----- 
  From: Al Gietzen 
  To: 'Velocity Aircraft Owners and Builders list' 
  Sent: Thursday, June 07, 2007 11:34 AM
  Subject: Re: REFLECTOR: Brake authority




  I concur with Larry - 10KIAS makes a big difference.

  My canard stalls at 60KIAS with just me, 65KIAS with

  two people up front.



  I still have about half the width of the elevator cuff on the elevators. It gives a very gentle pitch-buck at stall, I've never felt a lack of elevator authority; and I never have full aft stick on landing.  However; would removing the rest of the cuff reduce the stall speed?



  I have my ground idle set to about 500 RPMs (Lyc

  IO-540 with two mags) which is pretty much as slow as

  it will run



  My engine idle is about 850; that's about 210 rpm on the prop.



  Al



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