Displacement during snap rolls (was Why is it so quiet?)

[tony at radiosouthrc.com]

Doug:

Yes, it was an "L", your right...  Yep, two-seater and even at that I am tall enough that I had to hunch over a little to close the canopy!  I was fun however!

Tony Stillman
Radio South
3702 N. Pace Blvd.
Pensacola, FL 32505
1-800-962-7802
www.radiosouthrc.com
  ----- Original Message ----- 
  From: Doug Cronkhite 
  To: discussion at nsrca.org 
  Sent: Wednesday, December 29, 2004 6:30 PM
  Subject: RE: Displacement during snap rolls (was Why is it so quiet?)


  That's because you're actually stalled. Most people think a snap roll is a high G maneuver, but when the wing stalls, there can be no G other than 1 except for the rotational component. 

  I remember awhile ago people on this list were discussing the inverted avalanche and how people were going to break wings. If they break a wing on this maneuver, it's because they never stalled. Not exactly the nicest indicator but it is one none the less. A properly flown snap puts much more torsional stress on the fuselage than the wing well ever experience.

  Also.. weren't you uncomfortable sitting on Steve's lap in the 300S? :-P   Hehehe.. I think you meant 300L..

  -Doug





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    From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On Behalf Of tony at radiosouthrc.com
    Sent: Wednesday, December 29, 2004 4:17 PM
    To: discussion at nsrca.org
    Subject: Re: Displacement during snap rolls (was Why is it so quiet?)


    Bob:

    Speaking of being in a full-scale airplane, I was in an Extra 330S with Steve Rojecki, and we did several snaps.  I was VERY surprised to find that the snap was pretty smooth....  not at all what I was expecting!  Yes, my head moved around a bit, but I was not thrown around the cockpit like I thought I would be.  I am sure that the way we entered it had a lot to do with it!



    Tony Stillman
    Radio South
    3702 N. Pace Blvd.
    Pensacola, FL 32505
    1-800-962-7802
    www.radiosouthrc.com
      ----- Original Message ----- 
      From: Bob Richards 
      To: discussion at nsrca.org 
      Sent: Wednesday, December 29, 2004 2:21 PM
      Subject: RE: Displacement during snap rolls (was Why is it so quiet?)


      Dean Pappas <d.pappas at kodeos.com> wrote: 
        Yes, and some small forgiveness needs to be established. Say, half a wingspan?


      Similar to the (should I say it) "Stall Turn", where a 1 wing displacement up/down is ok. It is possible for the plane to travel up/down on exactly the same line, but there are no downgrades if it moves laterally by one wingspan.

      Smoothness and gracefulness have been mentioned a few times in this thread. Somehow, I don't believe there is anything smooth and graceful about a snap roll. :-) Have you ever been in a real plane that has done a snap roll? I have. :-0

      As I have said many times, the real heroes in this hobby are the cockpit dummys. No matter what kind of crap we put them through, they continue to hold a straight face. They won't even close their eyes before impact!!!
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