Efficient Propellers

Boat propellers are rotating foils.
Efficiency is strongly related to the aspect ratio of the blades:
- higher aspect gives better efficiency.
Efficiency is strongly related to the inlet and outlet velocity ratio of the prop:
- lower ratio gives better efficiency.


Durable folding propeller with nylon hub and stainless steel blades.
Propeller suits easily driven hull with 6X gear ratio.
Propeller price USD110 plus mail cost - email rickwill@bigpond.net.au

Folding propeller fully folded.



Aluminium Propeller Milled by Rohmec to CAD file supplied
Prop shown used to set 24 hour record


V11J with Fabricated Steel Prop On Curved Spring Steel Shaft