Impeller Chart

[apollo18]

Does anyone have a chart that tell how fast a impeller will push a boat? depending on size of boat &weight.
hp + rpm + impeller size = mph

[apollo18]

http://www.liquidaddiction.net/images/heatseeker/berkeley%20chart.jpg
Acording to the chart 200 shaft hp at 4200rpm you should use a (C) impeller.
What happens if you use a (E or A2) And what is the mph?

[flat broke]

http://www.liquidaddiction.net/images/heatseeker/berkeley%20chart.jpg
Acording to the chart 200 shaft hp at 4200rpm you should use a (C) impeller.
What happens if you use a (E or A2) And what is the mph?
If you have a baseline speed/RPM datapoint, you can use LV Jetboy's JPC to get an approximation of where you would be at different RPMs from a MPH standpoint.
Chris