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Jim,<br> Consider using a "Timing Belt" it will offer the positive drive of a chain with the quite operation of a belt. These are used in industry all the time and offer long life with no maintence

I'm sorry for the confusion. I had planned on a 12x10 two blade prop. Then I found a 3 blade 12x6, (which I didn't notice had a 7/8" bore). I ended up using a 12x8 two blade sail boat prop. I have a

What prop did you settle on. In your original message (#20) you mentioned that you were using a 12 x 10 prop. In you Photos you mention a 12 x 6 three bladed prop.

hope you people like what you see, and if you do check out links on my Yahoo messenger profile and you will get more info on me and my hobby.

I have an Autohelm ST30 knotlog installed. I cruise at 4 knots and max at 5.5 knots. I only have 2 speeds right now. I run at 18 volts or 36 volts. Low speed range is 8-9 hours. Hi speed is 4-4.5

Does anyone have any first hand expierence with using a Kort nozzle on electric boats. My research seem to indicate that they may help especialy when dealing with the low speed that electric boats

Hey Rus,<br> Can you send me an email at natherholt@... when you have a moment? I am interested in getting some more detail on your motor system. it sounds like it would work well for my

Hello Larry, I looked at the pictures "great job"...<br>One direction you may take to improve the efficiency (cruise speed and range) of you launch is to look into a more efficient propeller once you

Thanks for initiating the discussion on hull speed and, conveniently, using my launch as the example! Before building the boat I performed much the same calculation and arrived at much the same

hi doug<br><br>you wrote on sept. 5, and i just signed on and saw your note today, dec. 28, so it may be too late. but here goes.<br>first, i wouldn't consider buying a planing hull like the lund if

hi, r.c.<br>sorry for the long delay in responding (if it's not already too late) but i just recently came upon this club and saw your query.<br>one reason there's little info to be found is that

Hi Larry, and merry xmas.<br><br>The hull speed for your new launch is (theoretically) 1.34 times the square root of the waterline length. But this is purely a theoretical maximum (there's

Thanks joe for the information on the low cost Tachs. I have several good expensive one for my real life business but its nice to know that I can tell someone about the low cost alternative. I think

Hi Donaldbear and all,<br>You asked in an earlier post if you could have a copy of some Motor/prop data for your spreadsheet. I'm going to be doing some motor, prop and gear testing in a month or so.

I arrived home last night to find the latest issue of the Electric Boat Journal in my mail. It is a 32 page double issue, jammed with information and stories about electric boating. Many thanks to

Merry Christmass and may you have many more.

Larry<br> Your absolutly correct about the speed for you hull. I was only picking 8 knots as an example. For your boat we should use a number around 5.8 knots or say 6 knots. The calculations are

Hi Bill, I remember living aboard during winter-time on the bay. I lived in Deal, Md. for a few years. (Ice eaters outside and glycol in the bilge)<br><br> You may not need to mess with belts(and lose

Thanks for the Idea about a hull drag test. I may try that as soon as it warms up here on the Chesapeake. I'll post any data so that other can follow along with the repower story. Should be

Seems like there must be something wrong here. <br><br>First, how does the calculation relate to hull type/configuration? Theoretical hull speed on a 23' displacement boat is going to be a lot below 8