REFLECTOR: sparrow strainer QUESTION???

Douglas Holub douglas.holub at gmail.com
Tue Oct 18 21:24:42 CDT 2011


Cruising trimmed for level flight, then pull the stick back for awhile, then let it go.
  ----- Original Message ----- 
  From: aminetech at bluefrog.com 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Tuesday, October 18, 2011 8:11 PM
  Subject: Re: REFLECTOR: sparrow strainer QUESTION???


  Doug,

  Good info.  Were you out of trim when you did that test?

  John

  --- douglas.holub at gmail.com wrote:

  From: "Douglas Holub" <douglas.holub at gmail.com>
  To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
  Subject: Re: REFLECTOR: sparrow strainer QUESTION???
  Date: Tue, 18 Oct 2011 20:03:45 -0400

   
  I thought there were many planes flying without the sparrow strainer. I flew mine for awhile without it. I added it to improve pitch stability. Without the strainer, when I let go of the stick to evaluate pitch stability, the initial descents were so fast it was scary.  

  Doug Holub
  Standard FG
    ----- Original Message ----- 
    From: aminetech at bluefrog.com 
    To: Velocity Aircraft Owners and Builders list 
    Sent: Tuesday, October 18, 2011 5:05 PM
    Subject: Re: REFLECTOR: sparrow strainer QUESTION???


    As I understand it, the elevator is extremely balanced which makes it unstable and the strainer was added to create a force for stability.  The bottom line is that you need a spring to hold the elevator in one spot for stability.

    John

    --- velocity_pilot at verizon.net wrote:

    From: "Alex Balic" <velocity_pilot at verizon.net>
    To: "'Velocity Aircraft Owners and Builders list'" <reflector at tvbf.org>
    Subject: Re: REFLECTOR: sparrow strainer QUESTION???
    Date: Tue, 18 Oct 2011 14:41:49 -0500


    I don’t think that the sparrow strainer has anywhere near enough force to act as the main trim system, even if you could make it electrically adjustable- plus the problems that Doug mentioned. 
    Remember, the “elevator” on a canard is really a flap, and it takes a lot of load- not like a standard elevator that is more or less aerodynamically balanced during normal flight. 
    From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Douglas Holub
    Sent: Tuesday, October 18, 2011 2:06 PM
    To: Velocity Aircraft Owners and Builders list
    Subject: Re: REFLECTOR: sparrow strainer QUESTION??? 
    A couple cons would be more drag and a mechanical assembly out in the weather instead of in the cabin. 
    ----- Original Message ----- 
    From: Jeff Howell 

    To: reflector at tvbf.org 
    Sent: Tuesday, October 18, 2011 2:07 PM 
    Subject: REFLECTOR: sparrow strainer QUESTION??? 
    Question???
     
                  A fellow Velocity builder and I were talking.... We got to discussing the sparrow strainer trim tab on the elevator. Our question to everyone out there is... Could you use the sparrow strainer in conjunction with some sort of actuator as an elevator trim and remove the stock Velocity glass spring and elevator trim actuator??? what would be the pros and cons of having the sparrow strainer as your adjustable trim tab??? Thanx Jeff 

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