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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John posted a discussion

Roberts Spray 36 - Steel ketch - Eelctric propulsion conversion - BLACK MAGIC!

Hi all,I'm in really really big big need of some opinions and advice.I'm looking onto converting my vessel to electric propulsion.First boat details:Spray 36'  - 32ft LWL, 4.3ft Draft, 12ft beam at WL, 40000lbs displacement.She has round bilge of steel.She's fitted with a  fixed 3 blade propeller of 18 inch dia. The shaft is 1&1/2 inch thick. Now my goals:Theoretical hull speed is 7,5knts and I'm aiming at 80% of that.I can't afford Lithium batteries so I'm going for AGMs. I can fit up to 8…See More
yesterday
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Max Sail updated their profile
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Max Sail posted a discussion

Right System for a Hallberg Rassy Rasmus 35?

Hello all.. I'm a longtime lurker in the process of buying an old Hallbery Rassy Rasmus 35. I'm looking for suggestions for the right system for this cruising boat. It's 12,100 pound displacement.http://sailboatdata.com/viewrecord.asp?class_id=5189Electric Yacht's Quiet Torque 10 48v system says it goes to 35' and 12,000 pounds.. so right at or just over the upper limit. Whereas their QuietTorque 20 48v goes to 45' and 22,000…See More
Wednesday
Profile IconJohn Wilson, Kent Johansson and James Koerber joined Electric Seas
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Dave Freeman posted a discussion

Using Leaf or Tesla battery modules for a 48v EV system

Hello, I have just started doing some basic research about converting my 27 foot sailboat to electric. This is not something I plan to do right away, but our current engine is getting old in the tooth and I am interested in switching to electric when it reaches the end of its life, probably in the next 1 to 5 years.It has a 20 hp engine so I am thinking a 10Kw electric would be a good replacement with approximately a 200 amp hour 48 volt battery bank.In researching batteries I came across Tesla…See More
Feb 18
Profile IconDave Freeman and Mike H joined Electric Seas
Feb 17
David Brill posted a discussion

First major test

Following on from my last post, my partner and I were very keen to take a well overdue break from our business. Having just anti-fouled the yacht our destination was a resort island off the coast of far north Queensland. This trip was about 4 hours from our mooring. We knew it was going to be a little rough, but as we hadn't been out for so long we really didn't care too much about the conditions.We cast off at 7:00am and for the first couple of hours made great headway solely under electric…See More
Feb 10
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Feb 9
Fritz Raake posted a discussion

Solar Electric Pontoon Boat

We are currently involved in a electric/solar conversion project of a pontoon boat. Length 7.50 - 9.00 m (yet to be decided), Width 3.50 m The boat will be used to seat 16-24 people and cruise on a large lake in Africa. We estimate that the vessel will have a displacement of around 3 tonnes when fully loaded.We aim to convert the boat to use two electric outboard motors of 5 kW each with a battery bank for storage suitable for 6 hours of running time without AC grid charging.Any information…See More
Feb 9
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Feb 1
David Brill posted a discussion

Results after fresh anti-foul

Our yacht is a steel ketch weighing in at 26 ton (imperial). 3 years ago I replaced the 7L diesel with a 70kW electric motor and 235v LiFePo4 (160 Ah) batteries (72 bateries).Since that time my business has consumed most of my time and money. This week we slipped her and gave her a new antifoul paint job. The results were astounding.Coming back from the slip to the mooring (3 nm) she was pulling 5.9 k at about 950 rpm. The hull speed is 8 knots and max rpm is 1300. Drawing 149 amps from the…See More
Jan 27
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Jan 20
Greg Martin updated their profile
Jan 19
Profile IconTim Ramsdell, David Adams and Jesper Rugbjerg Madsen joined Electric Seas
Dec 29, 2016
Irie Electrics updated their profile
Dec 9, 2016
Davide Sola is now a member of Electric Seas
Dec 5, 2016
Peter Cinq Mars is now a member of Electric Seas
Nov 29, 2016

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