[NSRCA-discussion] Snaps

[R. LIPRIE]

Nat,'

            I agree with what you said, all the way. And it actually helped me understand a little bit more. About the substance of snap rolls. But there still is a very big controversy over the (millions of ways) to do a snap roll. But maybe one day everybody will agree on one particular way.
  ----- Original Message ----- 
  From: Nat Penton 
  To: NSRCA Mailing List 
  Sent: Saturday, July 08, 2006 10:21 PM
  Subject: Re: [NSRCA-discussion] Snaps


  Matt
  The outboard wing is seeing a huge increase in AOA with the aileron and elev  working cooperatively. Even though the inboard wing is experiencing lower flow it is being washed out by the aileron.

  At the stall it is erroneous to consider a "dumping of lift". The lift remains relatively high over a broad range of the curve and the drag is going astronomical at this point. Refresh your memory ( like I just did ), get out your old text  and look at the typical wing curves.
    ----- Original Message ----- 
    From: Rcmaster199 at aol.com 
    To: nsrca-discussion at lists.nsrca.org 
    Sent: Saturday, July 08, 2006 2:45 PM
    Subject: Re: [NSRCA-discussion] Snaps


    In a message dated 7/8/2006 2:09:25 PM Eastern Standard Time, natpenton at centurytel.net writes:
      Matt
      Regards. Two comments. 
      Snap characteristics are independent of scale. The only thing that changes is the clock ( due to changes in moments of inertia ). 
      When the rudder is applied it is the outboard wing that exceeds the stall AOA and dumps. Actually it is not much of a lift dump but a huge jump in drag.
    Nat true. Moments of inertia are design parameters. So are several other key parameters that may make or break a model's ability to perform snaps. That was my point.

    I agree in terms of AOA (outboard aileron low) and drag increase but I am not as sure regards to lift. I know what you are saying though. 

    One question: how does the outboard panel lift over the top if its lift has been dumped?




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