Originally Posted by
Fl1ingfrog
Annex I to ED Decision 2019/005/R
‘AMC and GM to Part-FCL — Issue 1, Amendment 7’
‘Incipient spin’ refers to a transient flight condition in the post-stall regime where an initial, uncommanded roll in excess of 45° has resulted from yaw asymmetry during a stall and which, if recovery action is not taken, will lead rapidly to a developing spin. Prompt recovery during this Annex I to ED Decision 2019/005/R Page 7 of 50 incipient spin stage will normally result in an overall heading change, from pre-stall conditions, of not more than 180°.
‘Developing spin’ refers to a flight condition in the post-stall regime where the aeroplane exhibits abnormal, but varying, rates of yaw and roll, together with changing pitch attitude, following an incipient spin but before the establishment of a developed spin. A developing spin follows an unrecovered incipient spin and will usually persist, in the absence of any recovery action, until a developed spin ensues. ‘Developed spin’ refers to a flight condition in the post-stall regime where the aeroplane has achieved approximately constant pitch attitude, yaw rate and roll rate on a descending flight path. In transition from a stall with significant, persistent yaw, with no recovery action, to attaining a developed spin, the aeroplane is likely to have rolled through at least 540°.
EASA can't help dabbling. They leave one losing the will to live.
And any attempt to try and define these states by referring to a specific number (180 degrees, 540 degrees) IMHO does far more harm than good. There MAY be a specific aeroplane that hits these specific numbers, but it varies massively from aircraft to aircraft.