[ygmir]

that looks pretty neat.
Are they hinged, or, fixed vane?
It looks kind of like a squirrel cage fan? If so, how does it create thrust when submerged? I see it does, but, my limited little mind doesn't understand how they make you move so well if mostly underwater...............
I like how you made them just smaller dia. than the tires so as not to hit so much when driving on land while entering and exiting the water.

Henry