[NSRCA-discussion] Snaps

[R. LIPRIE]

Ya Rc master,

        After I sent you that email I refreshed myself on some books. And turns out it will snap both directions. But (sometimes) it depends on the airplane. And like Nat was saying (the outboard wing is seeing a huge increase in AOA with the aileron and elevator working cooperatively. Even though the inboard wing is experiencing lower flow it is being washed out by the ailerons.
 
And at the stall it is definitely necessary to accept a dumping of lift. And also the curves on the wing and plus drag. Is a major factor in a snap roll.

Matt
  ----- Original Message ----- 
  From: Del K. Rykert 
  To: NSRCA Mailing List 
  Sent: Saturday, July 08, 2006 6:51 PM
  Subject: Re: [NSRCA-discussion] Snaps


  I will have to disagree with that Matt..  As I can snap my pattern ship either direction as well as upright or inverted. One may present better than the other but it will do a true snap. 

                   Del 
            nsrca - 473
    ----- Original Message ----- 
    From: R. LIPRIE 
    To: NSRCA Mailing List 
    Sent: Saturday, July 08, 2006 4:02 PM
    Subject: Re: [NSRCA-discussion] Snaps


    Rc Master, I might have an answer for you on how does that wing come over if all of its lift has been dumped. See usually you do a snap roll the way the engine torque is pulling. Which is usually to the left so you usually do a snap roll to the left. That really actually forces that wing with no lift to come over. Because the torque of the engine is pulling it.


    Matt
      ----- 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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