[jaggederest]

It's a turgo - mid head mid flow, actually.

He wouldn't need such large pipe for a penstock if he was using a pelton wheel, but he also doesn't have the head to drive a pelton efficiently - the more the better for one of those.

I've seen systems that put 2kw of energy through 2" pipe! 350+ feet of vertical head will do that.

[walshemj]

ah cool most of my knowledge of hydro is a from the large scale stuff hadn't heard of a turgo before - it seems to be a variation on pelton tho.

[jaggederest]

Yeah it's basically a modification of a pelton wheel, sort of adapted for higher flow and lower pressure. Technically a turgo wheel IS a pelton wheel, but they serve sort of separate purposes.