@Propstrike;- Nice period film there in that Link. Correct, I would demure from discussion of specifics on an open forum.
When I started flying, spinning and recovery were a normal part of the syllabus – which hadn’t really changed since the Great War. Today, other, arguably less relevant material for GA (Such as CRM.) has been added, at the expense of vital spin training. In my opinion, simply teaching a student to avoid the incipient spin is next to useless, since, if he/she gets into one in a average GA a/c it’ll have hardly been deliberate…and at that point rather too late to get out the books…! It’ll also probably be at low altitude…. The effects of this backwards step have only been mitigated by the generally very docile characteristics of modern GA a/c.
In general terms, I’d say that if one is going to aerobat any a/c, then practicing spin-recovery – with plenty of air below you – is essential. Most aerobatic a/c are strong and don’t break easily, but they will still spin very well. I haven’t aerobatted a Stearman, but in the Pitts, it’s certainly alarming at first, as being so small & close-coupled, it all happens pretty fast. The height loss is pretty sobering too, especially if one makes a hash of it…. The ground certainly always looks a lot closer when spinning inverted…..