Did you check out Dave Gerr's Propeller Handbook? $17.05 online price from Barnes and Noble.
--- In electricboats@yahoogroups.com, "alex" <alex04032@...> wrote:
>
> Hey guys, my boat is almost done and pics to follow, but Im expecting the props will need adjusting and Id like to deal with that before launch.
>
> I rebuilt an 18ft daysailor, 1200-lbs totally loaded, with six golf-cart batteries driving two 36v Minn Kota 101-lb-thrust motors rated 50 amps each. I estimate that is 3hp total at the props. My calc's estimate that a hull speed of 6mph can be reached with 2hp. Thats my goal.
>
> Here is the tricky part. I dont know the rpm or pitch of the Minn Kota 101. Its 9"d, I hear its 4"pitch, but I dont know that or the RPM.
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> Rumor has it that at full RPM and small slip, the max boat speed for Minn Kota is 3.5 mph. If so, I want to increase the prop pitch and maybe diameter, too, so that I can reach hull speed. I have RMS amp meters on each motor and PWM controllers so I expect to be able to keep an eye on the motor amps/heating.
>
> Can anyone analyse the Minn Kota RPM and prop ? Im preparing to buy a couple used 10x9 props and fix them to Minn Kota hubs. Any feed back on how this might result ?
>
> p.s. I can buy used salt water Minn Kota 101's (1.5hp) anytime, including PWM controllers for about $450... thats a real watts/dollar bargain.
>
> Thank you !
>
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