[NSRCA-discussion] [F3A-Discussion] snaps

[mjfrederick at cox.net]

Ken, the description does not say that the airplane can deviate from the flight path, it states that the rules for judging deviation from flight path are no different than an axial roll. What is does state is that the fuselage must show a break/separation from the flight path, it does not say that the fuselage's deviation from said path can cause a change to the flight path itself, that would be a deduction. Furthermore, the lack of a break will only be a serious downgrade (5 points or more) if the lack of a break also results in a barrel roll or axial roll disguised as a snap (I've heard people call these twinkle rolls). Otherwise, the one point per 15 degree rule would apply (if you've got good enough eyes to see it) to whichever portion of the maneuver occured prior to the beginning of autorotation. I know a lot of people take issue with these rules, but they really are not as harsh as everyone makes it out to be, and under the F3A rules it is actually very hard to zero a snap. AMA, now that's another matter altogether.

Matt
---- Ken Thompson <kthompson56 at satx.rr.com> wrote: 
Glad for that description...the way I originally understood it the plane was not supposed to deviate from the flight path...always said that was impossible...

Ken
  ----- Original Message ----- 
  From: Dr Mike 
  To: 'General pattern discussion' 
  Sent: Monday, July 05, 2010 7:04 AM
  Subject: Re: [NSRCA-discussion] [F3A-Discussion] snaps


  Yes that is correct, thanks Matt.

  Mike 

   

  From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of rcmaster199 at aol.com
  Sent: Sunday, July 04, 2010 6:22 PM
  To: nsrca-discussion at lists.nsrca.org; f3a-discussion at lists.f3a.us
  Subject: Re: [NSRCA-discussion] [F3A-Discussion] snaps

   

  The F3A maneuver description may be inadequate and/or inaccurate, however that doesn't much matter for the judge who has the ardeous task of deciphering the snap. The description stands as is for this cycle and that's how the World's judges will judge them to the best of their ability next year. I urge all judges that judge F3A Semis and Finals at this year's Nats/Team Selection contest to take heed of FAI description (not AMA) and judge accordingly.

   

  In essence, Snaps should not zeroe'd as easily as they once were; far cry from where it was just a couple years ago. I believe that's the main reason the rule was written as indicated. 

   

  Mike's point I think deals with bringing the Snap back out of hibernation such that folks get a chance to re-read it and re-hash just in time for the Team Selection; fresh in one's mind so to speak

   

  Matt K

   

   

  -----Original Message-----
  From: Woodward, Jim R (US SSA) <jim.woodward at baesystems.com>
  To: 'f3a-discussion at lists.f3a.us' <f3a-discussion at lists.f3a.us>; 'nsrca-discussion at lists.nsrca.org' <nsrca-discussion at lists.nsrca.org>
  Sent: Sun, Jul 4, 2010 4:27 pm
  Subject: Re: [NSRCA-discussion] [F3A-Discussion] snaps

  Mike, I'm replying from a blackberry without the benefit of the rulebook in front of me. I thought these were called "Flick Rolls" now? I don't think any of us are equipped in the context of judging a 0.5 second manuever to determine if is "stalled" or "unstalled." I think Jerry Budd posted on the nsrca list the last dissertation on snaps, which from memory, pretty much proved the planes are not stalled.

  Given you posted this, what do you want to see happen? Thx Jim W.

   


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  From: f3a-discussion-bounces at lists.f3a.us <f3a-discussion-bounces at lists.f3a.us> 
  To: 'General pattern discussion' <nsrca-discussion at lists.nsrca.org>; f3a-discussion at lists.f3a.us <f3a-discussion at lists.f3a.us> 
  Sent: Sun Jul 04 17:11:46 2010
  Subject: [F3A-Discussion] snaps 

  Given the abundance of snap maneuvers(7 maneuvers, 9 snaps) in the F-11 pattern, I feel compelled to give the exact description via the F3A rulebook:

   

  A snap-roll is a rapid autorotative roll where the model aircraft is in a stalled attitude, with a continuous high angle of attack.

   

  Snap rolls have the same judging criteria as axial rolls as far as start and stop of the rotation, and constant flight path through the manoeuvre is concerned.

   

  At the start of a snap-roll, the fuselage attitude must show a definite break and separation from the flight path, before the rotation is started, since the model aircraft is supposed to be I a stalled condition throughout the maneuver.  If the stall/break does not occur and the model aircraft barrel-rolls around, the manoeuvre must be severely downgraded(more than 5 points).  Similarly, axial rolls disguised as snap-rolls must be severely downgraded(more than 5 points)

   

  Snap-rolls can be flown both positive and negative, and the same criteria apply.  The attitude(positive or negative) is at the competitors discretion.  If the model aircraft returns to an unstalled condition during the snap-roll, the manoeuvre is severely downgraded using the 1 point/15 degree rule. 

   

   

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