"Need" is such a strong word. It's a hell of a lot harder to fly, and you can't turn, take off, or land easily, but you can manage it as long as you have some degree of pitch in the direction you want to go.
That, and unlike a real helicopter the blade isn't actually connected to the character. Their STR and DEX is at whatever arbitrarily high number would be necessary to do
this overhead
There's nothing in the rules for it and it seems unlikely it'd be possible physically.
[/quote]
"There is only RAW, it is impossible to extrapolate further values from the existing (and surprisingly accurate) measurements which
are in the rules."
Also, "possible physically"? You're aware that past 4th-5th level or so PCs are literally superhuman, right? By 20th level they exceed just about every fictional character you can think of, including a number of gods. It's at the root of why the scaling is so broken: they used realistic measurements and feats for baseline humans to determine... what baseline humans could do. An average of 10 in ability scores
is a vanilla human; a 1st-2nd level PC is already in the top 1% of human capabilities if they've got a decent point spread, even Elite Array. People like to talk about how D&D is so unrealistic &c. at high level play... but that's sort of the point. It's wrong to think of high level adventurers as mortals, because they effectively aren't; Epic-level PCs would fit into Exalted without too much difficulty.