[REL] Historically accurate 4-Bladed propellers for all Subs

Direction of spin is determined 2 ways.
Which side of center is it on
and is it forwards or behind center
Center being determined by the X position for left to right,
Z position for front to back.

Also note that if a prop goes above surface of water?
It counter rotates.

[Capt Jack Harkness]

Alright, so long story short, is there a way to get the props spinning the right directions?