??? Oh, really? First time I'd heard . . .
Once again, after 17 years flying helicopters, I find that there's a parallel universe of training standards that nobody had told me about. 's OK; I've been sort of following the doctrine without formal introduction (using "some" excess rather than "10%").
I would like to track down the training environment (civil/military, North American/Euro, piston/turbine?) in which this 10% is taught as a standard procedure; I try to stay aware of those parallel universes. In particular, I would be eternally grateful for the titles and authors of training manuals which cite this as a standard procedure, for none of MINE do so. (Civilian R22 toy helicopter background, so sorry.)
AND does anybody know a good, solid, helicopter-specific REASON why so many takeoffs are done at hover power rather than at max power or close to it? The fixed-wing philosophy is FULL power, let's get up high ASAP because the crankshaft is sure to disintegrate within minutes. Helicopters, however, almost universally linger near the ground at minimal power settings, prolonging the exposure to engine failure while low and slow amongst trees and wires and other cuddlies. I can do it OK; I just wonder WHY I'm doing it!