[NSRCA-discussion] [F3A-Discussion] snaps

[Woodward, Jim R (US SSA)]

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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