It's insane and whenever you manage to build one, it means you have gone way past the endgame... It's also a HECK of a lot of trouble to wire and properly pump out the steam produced, since it gets produced at such high rates and speeds. In order to convert the full power to MJ/RF by using steam i'm picturing a LOT of fluiducts and a LOT of steam dynamos/railcraft industrial steam engines... I have not played much with rotarycraft but that seems like the easiest way of converting between RC power to MJ/RF (Using Steam).