thanks for the help, unfortunately what i was thinking was a wide flat outlet (and inlet) with high volume and low pressure rather than the typical high pressure type available commercially. That's what he wanted to avoid.
the airboat idea has the flaw that the prop will always make the same...
I am looking for a basic calculation for determining the optimum diameter for an impeller. For the sake of imformation:
Medium: water, low salt content
Maximum power: 12.5 Hp @ 3500 rpm
Maximum lift: 12"
Flow: as high as possible
The reason: I'm an aircraft mechanic who builds boats on the...
