Electric propulsion - Wharram Builders and Friends2024-03-28T11:35:24Zhttps://wharrambuilders.ning.com/forum/topics/electric-propulsion?commentId=2195841%3AComment%3A10186&feed=yes&xn_auth=nowhat could be the advantage t…tag:wharrambuilders.ning.com,2023-02-16:2195841:Comment:2967492023-02-16T09:08:12.879ZJozef De Rooshttps://wharrambuilders.ning.com/profile/JozefDeRoos
<p>what could be the advantage to do that? the motor is the same and like you say, it has the same functionality. and it weighs more. I don't see it. </p>
<p>what could be the advantage to do that? the motor is the same and like you say, it has the same functionality. and it weighs more. I don't see it. </p> interesting.
out of curiosity…tag:wharrambuilders.ning.com,2023-02-16:2195841:Comment:2968552023-02-16T08:57:53.434Ztidehttps://wharrambuilders.ning.com/profile/tide
<p>interesting.</p>
<p>out of curiosity -</p>
<p>why not use the evo outboard version that offers the same functionality?</p>
<p><br></br> <br></br> <cite>Jozef De Roos said:</cite></p>
<blockquote cite="http://wharrambuilders.ning.com/forum/topics/electric-propulsion?id=2195841%3ATopic%3A9111&page=4#2195841Comment296679"><div><div class="xg_user_generated"><p>I am buildiing a tiki 38 and I want to use ePropulsion engines. More specific the pod drive 6.0evo. These also because the regenaration…</p>
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<p>interesting.</p>
<p>out of curiosity -</p>
<p>why not use the evo outboard version that offers the same functionality?</p>
<p><br/> <br/> <cite>Jozef De Roos said:</cite></p>
<blockquote cite="http://wharrambuilders.ning.com/forum/topics/electric-propulsion?id=2195841%3ATopic%3A9111&page=4#2195841Comment296679"><div><div class="xg_user_generated"><p>I am buildiing a tiki 38 and I want to use ePropulsion engines. More specific the pod drive 6.0evo. These also because the regenaration possibility off 1 kW at 10 knots. Less with lower speed offcourse. I hope with this and solar to be selfsuficient. For me no fuels on board. </p>
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</blockquote> I am buildiing a tiki 38 and…tag:wharrambuilders.ning.com,2023-02-14:2195841:Comment:2966792023-02-14T15:49:07.347ZJozef De Rooshttps://wharrambuilders.ning.com/profile/JozefDeRoos
<p>I am buildiing a tiki 38 and I want to use ePropulsion engines. More specific the pod drive 6.0evo. These also because the regenaration possibility off 1 kW at 10 knots. Less with lower speed offcourse. I hope with this and solar to be selfsuficient. For me no fuels on board. </p>
<p>I am buildiing a tiki 38 and I want to use ePropulsion engines. More specific the pod drive 6.0evo. These also because the regenaration possibility off 1 kW at 10 knots. Less with lower speed offcourse. I hope with this and solar to be selfsuficient. For me no fuels on board. </p> Lots has changed. Lithium bat…tag:wharrambuilders.ning.com,2021-09-01:2195841:Comment:2894642021-09-01T19:46:24.149Zboatsmithhttps://wharrambuilders.ning.com/profile/qe0j3ojqb10
<p>Lots has changed. Lithium batteries and many more motor options being huge. Also there are used motors and batteries from Teslas and Leafs available pretty cheaply.</p>
<p>We are currently building a 51' Wharram kinda cat. It will weigh in at 30,000 lbs with a 26' beam. Airconditioning, reefer/freezer , electric winches ,electric appliances. </p>
<p>We are using 4 stacks of 7 Tesla model s 5.6 kw batteries. Nominal voltage of 158volts. We are using Orion BMS's and Service Control Modules…</p>
<p>Lots has changed. Lithium batteries and many more motor options being huge. Also there are used motors and batteries from Teslas and Leafs available pretty cheaply.</p>
<p>We are currently building a 51' Wharram kinda cat. It will weigh in at 30,000 lbs with a 26' beam. Airconditioning, reefer/freezer , electric winches ,electric appliances. </p>
<p>We are using 4 stacks of 7 Tesla model s 5.6 kw batteries. Nominal voltage of 158volts. We are using Orion BMS's and Service Control Modules . We have Max prop24" 3 blade feathering propellers.The motors are Netgain Hyper 9HVs with a belt drive reduction through a jack shaft and thrust bearing. WE have assmebled a test cart to proof all of this before we install it all in the hulls. We have 2 Beta Marine 38hp diesels that are belted to two mor netgain motors to serve as 158v dc generators and a big 24volt alternator for the house banks. We have been researching electric drives for 2 years. We started buying components in March and now have the components set up on the test cart . We have every thing now wired up and charging and spinning the motor. It is not real easy. The people (Electric GT) who sold us the motors were of no assistance and told me to go away. We chargers and BMS's and batteries from Stealth EV . They also declined to help us make things work. Ewert Energy, who makes the Orion BMS's also will not help us. They say that is the dealers issue.We have had very good service from the Netgain Motors. We also have just puchased some more chargers , dc/dc converters and a SCM from Adam at Hawkeye Innovations LLC. He has been abig help so far and has a system set up just for the parts we have. <a href="%3Ciframe%20width=" src="https://www.youtube.com/embed/VdckOcVBik8" title="YouTube video player">" target="_blank"><iframe width="560" height="315" src="https://www.youtube.com/embed/VdckOcVBik8" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></a></p>
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<p></p> Hi all!I am new on this forum…tag:wharrambuilders.ning.com,2021-07-30:2195841:Comment:2887962021-07-30T14:11:47.395ZDimitri Dhuyvetterhttps://wharrambuilders.ning.com/profile/DimitriDhuyvetter
<p>Hi all!<br/>I am new on this forum, and one of my interests is in electric propulsion, so when I am ready to build my Wharram I would love to power it with electric.<br/>I am planning to build a Tiki 38 in a few years. We would mainly be sailing and thinking of two electric outboard engines with a diesel genset as backup.<br/>I'm wondering if there is anything has changed since the last message here?</p>
<p>Hi all!<br/>I am new on this forum, and one of my interests is in electric propulsion, so when I am ready to build my Wharram I would love to power it with electric.<br/>I am planning to build a Tiki 38 in a few years. We would mainly be sailing and thinking of two electric outboard engines with a diesel genset as backup.<br/>I'm wondering if there is anything has changed since the last message here?</p> i have a torquedo 2.0 with 4…tag:wharrambuilders.ning.com,2010-08-04:2195841:Comment:164292010-08-04T14:46:39.000Zclif highhttps://wharrambuilders.ning.com/profile/clifhigh
i have a torquedo 2.0 with 4 lead acid batteries that i am using for my 26 foot umiak (light weight skin on frame boat). I use 4 marine, deep cycle, lead acid batteries (due to much lower expense) which are very heavy at nearly 600 pounds. These provide 480 amo hours. The torq is great at moving my very light weight boat. WIll post some video in a couple of weeks. Using the umiak as a test bed for crab claw sail now. The batteries effectively doubled the weight of the boat. I had modified the…
i have a torquedo 2.0 with 4 lead acid batteries that i am using for my 26 foot umiak (light weight skin on frame boat). I use 4 marine, deep cycle, lead acid batteries (due to much lower expense) which are very heavy at nearly 600 pounds. These provide 480 amo hours. The torq is great at moving my very light weight boat. WIll post some video in a couple of weeks. Using the umiak as a test bed for crab claw sail now. The batteries effectively doubled the weight of the boat. I had modified the umiak with ama's to make it into a trimaran, both to get used to multihull sailing, as well as for stability in video work on water, and to get the boat licensed here in WA state, usofa. The torquedo is very effective. Great design. THeir plastic prop is ok, but has suffered some edge chips as it is somewhat fragile. This is an older torq, about 3 years, so maybe the props have been improved. Will look into that. I can get nearly 22 hours of continuous, 40% rate out of the motor, and at maximum thrust am probably moving nearly 8knts. I have a gps now, and will track the various speeds to voltage draw on next outing. But in general, very quality devices.<br />
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There are also small, highly efficient diesels that i intended to get and deck mount on what ever wharram i end up with (still looking to buy). These diesels are military grade and intended to only provide source for diesel electrics. THey are marine ready, and hardy to extreme cold weather. ALso known as micro-diesels as they are so small. The one i saw demonstrated would fit into the case of a desktop computer. So my solution is a diesel electric multiple motor approach....once i get the cat. In that system i would go with some minimal battery storage, but would really rely on the diesel for the electric source.<br />
clif Cynthia and Jean-Paul / APATI…tag:wharrambuilders.ning.com,2010-08-04:2195841:Comment:164252010-08-04T00:57:47.000ZRon Smithhttps://wharrambuilders.ning.com/profile/RonSmith
Cynthia and Jean-Paul / APATIKI<br />
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You've had a year with your electrical drive installation. What do you think of it now? anything you would have changed?
Cynthia and Jean-Paul / APATIKI<br />
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You've had a year with your electrical drive installation. What do you think of it now? anything you would have changed? Cynthia and Jean-Paul welcome…tag:wharrambuilders.ning.com,2009-09-05:2195841:Comment:101862009-09-05T21:50:49.000ZBertrand FERCOThttps://wharrambuilders.ning.com/profile/BertrandFERCOT
Cynthia and Jean-Paul welcome in this Wharrambuilders site and thank you to share here your own experiences.<br />
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Present time the batteries are the only way to store electric energy on board and unhappily the ratio weight/volume/energy stored is very poor compared with the hydrocarbon energy. It's why I think necessary for long cruising to install an hybrid system : diesel + electric engine in serie or parallel according your personal options and preferences.<br />
It's not possible to produce your…
Cynthia and Jean-Paul welcome in this Wharrambuilders site and thank you to share here your own experiences.<br />
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Present time the batteries are the only way to store electric energy on board and unhappily the ratio weight/volume/energy stored is very poor compared with the hydrocarbon energy. It's why I think necessary for long cruising to install an hybrid system : diesel + electric engine in serie or parallel according your personal options and preferences.<br />
It's not possible to produce your diesel when sailing but it's possible to produce and store your own electric energy and for me it's the main reason to have electric engines on board able to produce electricity when sailing. So it'll be possible to stay a lot of months in isolated islands without the need to sail in a main harbor to buy some diesel.<br />
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It's necessary to well understand the limitations of the lead acid batteries. Here is a graph of one 100Ah battery where you can show the variation of the real capacity according the intensity drew.<br />
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<p style="text-align: left;"><img src="http://storage.ning.com/topology/rest/1.0/file/get/1930081079?profile=original" alt=""/></p>
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In fact you can get almost 100Ah from this battery only if you draw 5Amp during 20h. As soon you increase the intensity, the real capacity decreases. When drawing 64Amp, the real capacity is only of 64Ah and I suppose when drawing 100Amp the real capacity will be about a maximum of 50Ah with a complete discharge after about only 30 minutes.<br />
The energy wasted in the battery is approximately proportional to the square of the intensity and to don't reduce too quickly the battery life it's necessary to don't draw more than 80% of its capacity. So in fact if at full throttle the intensity is 100A, after 20 minutes you have to stop your electric engine if you don't have a diesel generator.<br />
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In fact the batteries alone can drive the electric engine only when manoeuvring the boat or at low speed on a flat sea without wind, waves and current. As soon you request power for a long time you need an hybrid system.<br />
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With the hybrid serie configuration it should be better if you have a 48V engine to have a 48V generator to avoid to loose power in the 220V/48V or 110V/48V conversion and to be able to use the total capacity of the generator to drive one or two electric engines; you are not limited by the low power of the chargers if using this inverter system.<br />
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I'm not so affirmative than Jean-Paul to say the direct drive pods are more efficient than the inboard drive engines with a belt reduction because slower is the propeller RPM with a bigger propeller, better is its efficiency.<br />
We'll compare that when we'll have the opportunity to sail together in order to compare a Tiki46 equipped with 2 x 10kw electric pod with one another Tiki46 equipped with 2 x 10kw electric inboard engines with a belt reduction and with the 2 x 25hp diesel engines......<br />
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Bertrand Thank you for all the effort…tag:wharrambuilders.ning.com,2009-09-03:2195841:Comment:101312009-09-03T22:39:15.000ZAxelhttps://wharrambuilders.ning.com/profile/Axel
Thank you for all the effort you put into reporting your experience. It has helped to clarify it for me, unfortunately confirming what I found when I looked at electric propulsion 5 years or so ago. That is that there is still a BIG penalty in weight and cost. Certainly prohibitive for me no matter how badly I would like to have silent electric motors.<br />
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I really appreciate your efforts,<br />
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Alex
Thank you for all the effort you put into reporting your experience. It has helped to clarify it for me, unfortunately confirming what I found when I looked at electric propulsion 5 years or so ago. That is that there is still a BIG penalty in weight and cost. Certainly prohibitive for me no matter how badly I would like to have silent electric motors.<br />
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I really appreciate your efforts,<br />
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Alex Many thanks to Cynthia and Je…tag:wharrambuilders.ning.com,2009-08-30:2195841:Comment:99962009-08-30T16:26:48.000ZBob Boishttps://wharrambuilders.ning.com/profile/BobBois
Many thanks to Cynthia and Jean-Paul for providing what is, to the best of my knowledge, the most comprehensive treatise on electric propulsion for Wharrams anywhere on the web. This information is not only well-presented, but is based in real-world application, and not theory or marketing misinformation.<br />
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Again, to Jean Paul and Cynthia, thank you so much. We hope you have a nice end of summer cruise and we'll hear back from you at some point.<br />
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Kind regards,<br />
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Bob
Many thanks to Cynthia and Jean-Paul for providing what is, to the best of my knowledge, the most comprehensive treatise on electric propulsion for Wharrams anywhere on the web. This information is not only well-presented, but is based in real-world application, and not theory or marketing misinformation.<br />
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Again, to Jean Paul and Cynthia, thank you so much. We hope you have a nice end of summer cruise and we'll hear back from you at some point.<br />
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Kind regards,<br />
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Bob