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Volts will determine your rpm. The amount of torque it takes to turn the prop will determine your amps. Look at it like this; If you push the boat with the prop alone it will take lots of amps. If you

Eric and anyone else Still lots to think about. Now I would like to determine prop pitch and gearing. Some of the electric conversion web sites say that because of the torque produced by a electric

Hi Glenn, I bought a factory built unit from SolidNav, the Explorer model. It has a Mars motor with a Sevcon controller. I think the gear ratio is 2 to 1 maybe a bit more than 2, you should be able

Mark What motor and controller do you have? Did you get it as a kit or build it your self? What gear ratio and prop are you running? Sorry for all the questions but I am trying to figure this

I run my house on 8 of those 420ah L16HC's, two 24v banks. A back killer to move around for sure. Dekka and Trojan are good brands. Steve Spence Renewable energy and self

Hi Glenn, With my Ericson 27, (7000lbs before batteries) I have motored for 7 hrs at a draw of 20 amps. At that point I was using a small 2 blade prop that gave me 3 knts at that current draw. I now

http://www.popularmechanics.com/science/4237756 Popular Mechanics always has something of interest so here is another idea for battery composition. Steve in Solomons MD

These are trade size L16 batteries - often called 'Floor Sweeper Batteries'. IMHO, a MUCH better buy then the common Golf Cart batteries. L16's are typically around 400Ah, but more importantly are a

http://www.solarbattery-usbattery.com/usl16hcxc_6volt_battery.html I am doing research on what to use for my house batteries in my 78 hunter 33. I have a us-battery distribeter in my area and they

I probably missed this being posted but I'll post it anyway. http://www.blueplanetcatamarans.com/ So this thing is suppose to sleep 6. Take a look at the shots down the hull from the bow. Those

Glenn, I wouldn't go smaller than a 90 or 100Ah Li battery bank, small banks have bigger issues with Peukert's Effect, they lose more power under high load rates. You could also consider 4 group 31

Eric Thanks for the input, IMO the battery is key here. The actual power required to push the boat and the reserve capacity was what I was unsure of. It's good to get advice from some one who has

I have been looking at the AC-13 or AC-15 AC Motors they are large enough to use on my 36' steel hull, But I have not found much info that I could understand as to compair them to DC motors other

Glenn, Good reasoning on developing your budget, but I find your orignal budget a little aggressive, you will propbably go over that number by the time you get a running conversion with basic

Ah, yep I see. I was going on the numbers published by Sail in their little write up, they've got the hull length that Hunter lists as the LWL and don't make mention of the LWL from the Hunter spec.

Bill, So you were getting about 60 watts at 4 or 5 knots? That's right back where this conversation started.... I find it much more effective to talk about watts instead of amps in this kind of

Eric and all I set the budget based on what it would cost me to repower with a new/old stock diesel (Volvo MD2001 9 Hp, 1 Cyl). I currently have a non-working inboard gas with feathering prop (Albin

Hmmm. I just checked the Hunter website and it says the Hunter 27 waterline length is 23'7". But that's just a minor detail... It doesn't change the general results much. But we're obviously on

I've been in touch with the former owner of *ELCO* and he offers the following information: The best information and best recommendation I can pass on is to have people call

I love it when you lay it out for us. I'd like to throw in a few points however. The Catalina 30 actually has a shorter waterline, its listed as 25', while the Hunter 27 has a full 27' waterline and