Walter Graupner
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  • West Fork, AR
  • United States
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Walter Graupner's Discussions

Compelling reason to restore my antique diesel
4 Replies

 Ok, before I'm kicked out of the forum, look at this Utube.http://www.youtube.com/watch?v=21rJ30Y-sZg I don't have the same engine but my…Continue

Started this discussion. Last reply by Walter Graupner May 21, 2012.

electric motor selection
12 Replies

Greetings all,Maybe I didn't search the right places but got no information when I did.I've decided to go electric. My boat is a 1971 Nantucket Clipper, 7.5 ton yawl. She has a 3/4 full keel cutaway…Continue

Tags: planning, motors, simplicity, controller, dependability

Started this discussion. Last reply by Tom Hruby Apr 13, 2012.

 

Walter Graupner's Page

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Walter Graupner posted a discussion

Compelling reason to restore my antique diesel

 Ok, before I'm kicked out of the forum, look at this Utube.http://www.youtube.com/watch?v=21rJ30Y-sZg I don't have the same engine but my diesel is an old lifeboat type engine that has a similar characteristic. Another hobby I enjoy is playing music and this could be very handy. Any ideas on how I could get this out of an electric motor? WalterSee More
May 11, 2012
Walter Graupner posted a discussion

electric motor selection

Greetings all,Maybe I didn't search the right places but got no information when I did.I've decided to go electric. My boat is a 1971 Nantucket Clipper, 7.5 ton yawl. She has a 3/4 full keel cutaway aft.I would like to find the best motor to fit my ideal auxilary power source. As a sailor I want something that will go when it's needed. Dependability. My sails will always be the primary but I just ran aground on my friends boat and the removal process involved his powerful diesel in reverse and…See More
Apr 10, 2012
Walter Graupner posted a status
"Got loads of questions about electric power, regenerative braking, chargers of all kinds and sailing diesel free."
Apr 10, 2012
Walter Graupner is now a member of Electric Seas
Apr 5, 2012

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Rebuilding an old sailboat with intentions of using electrical power.

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At 12:33pm on April 9, 2012, Greg Martin said…

Hi Walter, so what kind of sailboat are you rebuilding? I restored/ renewed my 1967 Bristol 32 with an electric propulsion system and I can say it was the best thing I ever did. Please tell us about your project!

 

Anyway, I just wanted to let you know that we have forum topic under general discussions that we're using as an archive for previous messages to all members, concerning info about this site. Here's the topic:

http://www.electricseas.org/forum/topics/archive-of-messages-to-all

We'll periodically send a message with updates on what's going on. This site is always evolving, so please feel free to shape it into whatever you want.

Keep it charged!

-Greg

 
 
 

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Profile IconBob Stolow and Thomas Megan joined Electric Seas
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Patrick Logan posted a discussion

How to Determine Power (force) Needed to Push a Boat

There has been a longstanding "rule of thumb" to determine the motor size for an electric repower: Take the existing diesel horsepower and divide by three.  Multiply that number by 750 to determine the (continuous) wattage rating for a motor. This inserts a lot of assuptions and ignores every relevant fact needed to determine the best solution.There are a lot of spreadsheets out there that will give an approximate answer.  I've seen them.  I've delved into their formulas.  I've found each and…See More
Feb 1
Greg Branan updated their profile
Feb 1
Greg Branan is now a member of Electric Seas
Feb 1
Sally M. Reuther posted a page
Jan 30
Sally M. Reuther posted a page
Jan 30
Sally M. Reuther posted a page
Jan 30
Pat Neal posted a discussion

Belt size

As i stated in a post last winter I was having belt problems. the 1in L series timing belt was skipping teeth @ about 80-90 amps on my 48v system. I was having to much fun to change it over the summer. So I carried 2 spare belts all summer never needed them but better safe than sorry But have decided it was time to fix the problem so i ordered a set of cogs and a 1in h series belt. The end results are 18x15 3 blade with a 3:1 reduction and ME0913 motor @ full throttle now draws 150amps @ 49.6…See More
Jan 30
Ard Van Leeuwen updated their profile
Jan 26
Ard Van Leeuwen joined Sally M. Reuther's group
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Oceanvolt Electric Saildrive Group

Oceanvolt Ltd is focused on producing electric propulsion systems for catamarans and sailboats. Each and every part of the system has been specifically designed for electrical use. Compared to combustion engines, this system is silent, simple and reliable. “Less from nature, more for people.” Discover technology that respects both people and nature.See More
Jan 26
Profile IconBen Ellison and Ard Van Leeuwen joined Electric Seas
Jan 25
Bob Jennings posted a discussion

Used Electric Motors 4 Sale

I just saw this on the Cruisers Forum & thought I'd post it here in case anyone's interested. http://www.cruisersforum.com/forums/f64/electric-motor-setup-for-catamaran-thoosa-9000-a-159128.htmlSee More
Jan 16
Patrick Logan is now a member of Electric Seas
Jan 14
Skip Barbour added a discussion to the group Electric Yacht User Group
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New Battery technology

In electric yacht's  new year's message Mike Gunning mentioned  higher performing AGM based batteries that take advantage of TPPL and carbon additive batteries.  Does anyone know where I  can get more  information  on  these new  battery  technologies?Skip See More
Jan 13
Christopher Benson is now a member of Electric Seas
Jan 9
Dave posted a discussion

How do I edit my page

Hi, I'm new here, how do I edit my page, as my blog address is incorrect
Dec 29, 2015
Dave is now a member of Electric Seas
Dec 29, 2015
Nick Anderson posted a discussion

Battery monitoring and charge controller recommendations

GreetingsI have a 48V 300ah system for my ElectricYacht install. I am looking to provide both solar and wind generation to the system, solar first, then wind. I am looking at about a 200-300w Solar system due to current space limitations, and about 200w 48v wind.It appears that most 48v wind generators are self-regulating now - should I assume that I do not need a charge controller for both wind and solar?I am looking at each of the following charge controllers:…See More
Dec 22, 2015
Grant Corson is now a member of Electric Seas
Dec 19, 2015
Norman G. Moore is now a member of Electric Seas
Dec 15, 2015

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