paulo:
Which aircraft do you fly?
Here are some notes I was given a few years ago. This is what the judges were looking for.
Flick or snap rolls
1. The aircraft MUST pitch positive or negative (to initiate a stalled condition in both wings) and immediately yaw (to keep one wing unstalled) at the entry to the maneouvre - this is essential.
2. The initial 'nod' and yaw should be followed immediately by rapidly accelerating auto-rotation.
3. After the correct angle of rotation the roll should cease abruptly without any aileron-roll correction, and the aircraft should continue along an axis closely parallel to the extended pre-roll axis.
If the stall is inadequate the aircraft will fly a 'barrelled' roll with both wings providing lift, and considerable sideways translation from the starting axis is likely - this MUST be given a zero mark. Don't forget also to check that the maneouvre you see is positive or negative - whichever one the sequence calls for. It is sometimes difficult with the latest generation of aerobatic aircraft to see the pitch movement. For a given change in pitch, the tail will probably move further than the nose, so look for a tail movement away from the cockpit for a positive flick and to the cockpit for a negative figure.
Tony