Propellers Mk3

All my MK 3 propellers. These all work with my hovercraft but can be scaled up if needed.

Improvements over MK 2:
Lower pitch angle as when I tested the MK 2 only the outer, lower angle of pitch produces thrust.
wider blades, more thrust
thicker wing roots but smaller to help strength (please tell me if they break so I can edit them)
If you use Cura print with 'alternate extra layers' or if you don't try to find something similar. What this does is sandwich alternate infill layers in a extra wall, this increases print time a bit but increases strength many times so you should print at about 50% but please comment if that is to weak.