Sorry Mike, I should have clarified... As long as the “impression” of the snap done in front of me meets the criteria of the rules, then I will judge it as a snap. If there is no break (and it only needs to be a small one) then it will get a zero in F3A but severely downgraded for AMA classes. If there is a break, followed by a barrel or axial roll, it will be given a zero. Otherwise, all other snaps get scored.


Here's the FAI rules on a snap:
5B.4.3.5. SNAP-ROLLS
A snap-roll (or rudder roll) is a rapid autorotative roll where the model aircraft is in a stalled attitude.
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 in a stalled condition throughout the manoeuvre, If the stall/break does not occur and the model aircraft barrel-rolls around, the manoeuvre must be zeroed. Similarly, axial rolls disguised as snap-rolls must be zeroed.

Snap-rolls can be flown both positive and negative, and the same criteria apply. If the model aircraft returns to an unstalled condition during the snap-roll, the manoeuvre is severely downgraded.

And please, lets leave IMAC out of Pattern, the world is a better place this way...