What's the difference between a flick (snap) roll and an incipient spin?
The flying club where I do some part-time instructing recently received some ex-Navy Grob Herons (similar to Tutors but with 160 hp and fixed pitch props). They are cleared for erect and inverted spins - the latter with a recommended entry speed of upwards of 80 kts - yet 'snap' manoeuvres (their wording) are prohibited. Tutors are cleared for flicking so is this likely to be some paperwork limitation or is there some fundamental difference between flicking and spinning of which I am unaware?
And don't worry, I haven't been flicking them but I have to teach incipient spinning as part of the aeros syllabus so would like to know where the limits are.