Friday, May 4, 2012

Re: [Electric Boats] concept for an electric houseboat

 

Keith, and all,
What would be the advantage/disadvantage of metal framing for those interior walls?
Seems like there would be less weight, also resistance to moisture and associated problems,
assuming one properly coats/treats the metal frames prior to installation.
"JR"


On Fri, May 4, 2012 at 12:22 AM, Keith Jacko <nrixez@yahoo.com> wrote:
 

I'm interested in building an electric house boat. The basic concept is an easily driven houseboat, strictly displacement speeds (6 - 7 mph), powered by an electric outboard. I'm thinking about a 10kw outboard. The boat as sketched would displace just a little under 6 tons to sit on her lines. Here are a few pictures of the boat sketch (and a .skp file if anyone wants to play around):

http://www.dwdogs.com/Fusion/

I'd love to go with a ~40 kwh LFP pack, but reality probably has me sticking to around 20 kwh. There is enough space on the roof of the boat to fit 2 kw of solar panels. More if I really stretch it, but I'm thinking 2 kw should be enough.

Basic boat dimensions: 32' x 8' with a 16" draft. At 12,000 lbs with the proper center of gravity, the bottom of the transom would just be touching the surface of the water.

I live in Minneapolis, and this boat would be for cruising on the upper Mississippi and St. Croix rivers. Fairly sheltered, and no currents greater than 4 mph (hopefully less most of the time).

The boat will be built with plywood covered in glass / epoxy. I do plan on having fairly thick cabin walls for a boat... 2x4 construction, with closed cell foam insulation / floatation in the walls, hull, and cabin roof.

Any feedback about the sketches or general idea? I'm designing this as a liveaboard, and I plan on living on the hook as much as possible.

About the outboard, I'm not really sure how to figure the proper prop size, pitch, and rpm to shoot for. I understand the general rule of thumb "bigger prop, slower rpm, better"... but I don't know much past that. Could an electric outboard like say the up and coming Parsun 10 kw efficiently drive a heavy displacement boat like this? Or would it be better to think about using an inboard instead, so I would have the flexibility to tailor the rpm to my liking? I really do like the overall project simplicity of an outboard, but if it's really less than ideal I could consider alternatives.

Thanks for your thoughts and feedback. Cheers!
-keith


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[Electric Boats] Re: concept for an electric houseboat

 

Don't forget that a houseboat is a very ripe application for solar recharging sub-system, so solar should become part of your planning process.

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[Electric Boats] Re: concept for an electric houseboat

 

If this was on a lake and you only had to deal with the occasional headwind I'd say that 10Kw (13HP) was enough, but not in a 4 mph river current. I use my Torqeedo on a 12' john boat on the Wabash and its typical 2-3 mph current is formidable.

Concerning the hull form, I'd take out the severe rocker. Putting in a flat bottom admidships will give you greater pitch stability, reduce draft and power requirements, too.

--- In electricboats@yahoogroups.com, Keith Jacko <nrixez@...> wrote:
>
> I'm interested in building an electric house boat. The basic concept is an easily driven houseboat, strictly displacement speeds (6 - 7 mph), powered by an electric outboard. I'm thinking about a 10kw outboard. The boat as sketched would displace just a little under 6 tons to sit on her lines. Here are a few pictures of the boat sketch (and a .skp file if anyone wants to play around):
>
> http://www.dwdogs.com/Fusion/
>
> I'd love to go with a ~40 kwh LFP pack, but reality probably has me sticking to around 20 kwh. There is enough space on the roof of the boat to fit 2 kw of solar panels. More if I really stretch it, but I'm thinking 2 kw should be enough.
>
> Basic boat dimensions: 32' x 8' with a 16" draft. At 12,000 lbs with the proper center of gravity, the bottom of the transom would just be touching the surface of the water.
>
> I live in Minneapolis, and this boat would be for cruising on the upper Mississippi and St. Croix rivers. Fairly sheltered, and no currents greater than 4 mph (hopefully less most of the time).
>
> The boat will be built with plywood covered in glass / epoxy. I do plan on having fairly thick cabin walls for a boat... 2x4 construction, with closed cell foam insulation / floatation in the walls, hull, and cabin roof.
>
> Any feedback about the sketches or general idea? I'm designing this as a liveaboard, and I plan on living on the hook as much as possible.
>
> About the outboard, I'm not really sure how to figure the proper prop size, pitch, and rpm to shoot for. I understand the general rule of thumb "bigger prop, slower rpm, better"... but I don't know much past that. Could an electric outboard like say the up and coming Parsun 10 kw efficiently drive a heavy displacement boat like this? Or would it be better to think about using an inboard instead, so I would have the flexibility to tailor the rpm to my liking? I really do like the overall project simplicity of an outboard, but if it's really less than ideal I could consider alternatives.
>
> Thanks for your thoughts and feedback. Cheers!
> -keith
>

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Re: [Electric Boats] concept for an electric houseboat

 

Keith,

check Bear Mountain Boats - similar idea, a little smaller, well worked out electronics with solar and generator.  Good luck.

Allen

Allen F. Browne, M.D. 
Sent from my iPad

On May 4, 2012, at 12:22 AM, Keith Jacko <nrixez@yahoo.com> wrote:

 

I'm interested in building an electric house boat. The basic concept is an easily driven houseboat, strictly displacement speeds (6 - 7 mph), powered by an electric outboard. I'm thinking about a 10kw outboard. The boat as sketched would displace just a little under 6 tons to sit on her lines. Here are a few pictures of the boat sketch (and a .skp file if anyone wants to play around):

http://www.dwdogs.com/Fusion/

I'd love to go with a ~40 kwh LFP pack, but reality probably has me sticking to around 20 kwh. There is enough space on the roof of the boat to fit 2 kw of solar panels. More if I really stretch it, but I'm thinking 2 kw should be enough.

Basic boat dimensions: 32' x 8' with a 16" draft. At 12,000 lbs with the proper center of gravity, the bottom of the transom would just be touching the surface of the water.

I live in Minneapolis, and this boat would be for cruising on the upper Mississippi and St. Croix rivers. Fairly sheltered, and no currents greater than 4 mph (hopefully less most of the time).

The boat will be built with plywood covered in glass / epoxy. I do plan on having fairly thick cabin walls for a boat... 2x4 construction, with closed cell foam insulation / floatation in the walls, hull, and cabin roof.

Any feedback about the sketches or general idea? I'm designing this as a liveaboard, and I plan on living on the hook as much as possible.

About the outboard, I'm not really sure how to figure the proper prop size, pitch, and rpm to shoot for. I understand the general rule of thumb "bigger prop, slower rpm, better"... but I don't know much past that. Could an electric outboard like say the up and coming Parsun 10 kw efficiently drive a heavy displacement boat like this? Or would it be better to think about using an inboard instead, so I would have the flexibility to tailor the rpm to my liking? I really do like the overall project simplicity of an outboard, but if it's really less than ideal I could consider alternatives.

Thanks for your thoughts and feedback. Cheers!
-keith

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Thursday, May 3, 2012

Re: [Electric Boats] concept for an electric houseboat

 

If  I where you I would go with a pontoons base as a starting point to build something like this:


But if your a woody your a woody I also like these: 


http://www.epoxyworks.com/32/index.html    <----Little small but a work of art! 

As far as outboards go a 5hp electric would do about as good as a 10hp gas
 Torqeedo, Rayeo and Parsun outboards: 


On May 3, 2012, at 11:22 PM, Keith Jacko wrote:

http://www.dwdogs.com/Fusion/

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Re: [Electric Boats] concept for an electric houseboat

 

The Parsun will be a 10 hp, not 10 Kw. Determine prop shaft rpm and pitch for speed desired. If shaft speed is say 2200 rpm X 4" pitch = 8800" per minute X 60 = 528,000 inches per hour / 12 = 44,000 feet per hour / 5280 = 8.33 mph X 0.88 slip = 7.33 mph, easy, huh?

Bob

--- On Thu, 5/3/12, Keith Jacko <nrixez@yahoo.com> wrote:

From: Keith Jacko <nrixez@yahoo.com>
Subject: [Electric Boats] concept for an electric houseboat
To: electricboats@yahoogroups.com
Date: Thursday, May 3, 2012, 9:22 PM

I'm interested in building an electric house boat.  The basic concept is an easily driven houseboat, strictly displacement speeds (6 - 7 mph), powered by an electric outboard.  I'm thinking about a 10kw outboard.  The boat as sketched would displace just a little under 6 tons to sit on her lines.  Here are a few pictures of the boat sketch (and a .skp file if anyone wants to play around):

http://www.dwdogs.com/Fusion/

I'd love to go with a ~40 kwh LFP pack, but reality probably has me sticking to around 20 kwh.  There is enough space on the roof of the boat to fit 2 kw of solar panels.  More if I really stretch it, but I'm thinking 2 kw should be enough.

Basic boat dimensions: 32' x 8' with a 16" draft.  At 12,000 lbs with the proper center of gravity, the bottom of the transom would just be touching the surface of the water.

I live in Minneapolis, and this boat would be for cruising on the upper Mississippi and St. Croix rivers.  Fairly sheltered, and no currents greater than 4 mph (hopefully less most of the time).

The boat will be built with plywood covered in glass / epoxy.  I do plan on having fairly thick cabin walls for a boat... 2x4 construction, with closed cell foam insulation / floatation in the walls, hull, and cabin roof.

Any feedback about the sketches or general idea?  I'm designing this as a liveaboard, and I plan on living on the hook as much as possible.

About the outboard, I'm not really sure how to figure the proper prop size, pitch, and rpm to shoot for.  I understand the general rule of thumb "bigger prop, slower rpm, better"... but I don't know much past that.  Could an electric outboard like say the up and coming Parsun 10 kw efficiently drive a heavy displacement boat like this?  Or would it be better to think about using an inboard instead, so I would have the flexibility to tailor the rpm to my liking?  I really do like the overall project simplicity of an outboard, but if it's really less than ideal I could consider alternatives.

Thanks for your thoughts and feedback.  Cheers!
-keith



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[Electric Boats] concept for an electric houseboat

 

I'm interested in building an electric house boat. The basic concept is an easily driven houseboat, strictly displacement speeds (6 - 7 mph), powered by an electric outboard. I'm thinking about a 10kw outboard. The boat as sketched would displace just a little under 6 tons to sit on her lines. Here are a few pictures of the boat sketch (and a .skp file if anyone wants to play around):

http://www.dwdogs.com/Fusion/

I'd love to go with a ~40 kwh LFP pack, but reality probably has me sticking to around 20 kwh. There is enough space on the roof of the boat to fit 2 kw of solar panels. More if I really stretch it, but I'm thinking 2 kw should be enough.

Basic boat dimensions: 32' x 8' with a 16" draft. At 12,000 lbs with the proper center of gravity, the bottom of the transom would just be touching the surface of the water.

I live in Minneapolis, and this boat would be for cruising on the upper Mississippi and St. Croix rivers. Fairly sheltered, and no currents greater than 4 mph (hopefully less most of the time).

The boat will be built with plywood covered in glass / epoxy. I do plan on having fairly thick cabin walls for a boat... 2x4 construction, with closed cell foam insulation / floatation in the walls, hull, and cabin roof.

Any feedback about the sketches or general idea? I'm designing this as a liveaboard, and I plan on living on the hook as much as possible.

About the outboard, I'm not really sure how to figure the proper prop size, pitch, and rpm to shoot for. I understand the general rule of thumb "bigger prop, slower rpm, better"... but I don't know much past that. Could an electric outboard like say the up and coming Parsun 10 kw efficiently drive a heavy displacement boat like this? Or would it be better to think about using an inboard instead, so I would have the flexibility to tailor the rpm to my liking? I really do like the overall project simplicity of an outboard, but if it's really less than ideal I could consider alternatives.

Thanks for your thoughts and feedback. Cheers!
-keith

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