Woohoo!! I'm still waiting for my motor to arrive, but the controller is here already. I didn't get a throttle or any other controls, so it'll take me longer to get the motor spinning for the first time. Gonna need a contactor, too, come to think of it...
Allot of good advise in this one, will definitely come back to it and work out my own little repair tool/material kit when I actually come to sail the boat, ha ha
Wow - not sure what is preferred, designing from scratch or modifying existing setup like you do. I guess you get allot for free when working with existing parts and maybe sometimes limitations, in a weird way, makes it easier to make decisions in how to move forward. I envy you in the sense that you will have a full combustion engine experience and after the swap the electric propulsion experience for the same vessel as will give you a great base for comparison. As soon as I have my motor I will start my design and looking forward to share ideas.
Checked their page out and must agree, jut by looking at images you get a more 'solid' feel in relation to both housing and ports when looking at the Kelly in comparison:
I'm planning to get a new prop shaft and prop, the bigger cost is labour, so trying to save a >40yo 1-1/8th shaft seems penny-wise, pound foolish.
There's pros and cons to most all options, and rarely a "wrong" answer. Will be fun to compare notes though.Checked their page out and must agree, jut by looking at images you get a more 'solid' feel in relation to both housing and ports when looking at the Kelly in comparison:
View attachment 171469
Fingers crossed that both units will be fit for purpose
Jezz - 1400 km, that is a trip and a half. Is the main reason for changing the shaft/prop the dimensions or condition of them? I have seen props really old but in great nick (if made of copper).
There's some wear around the cutlass bearing, and there's a hole drilled where a bolt goes through the v-drive coupler and acts like a thrust bearing. The new prop is unlikely to be the same angle/thread as the old prop, too. So given all that, starting fresh seems ideal. Also, the new prop is 17" vs 13" I have now, and it's designed for electric drive, and can do regen.
Hope building/project is going well. Finally received the first motor: [HPM10KL , 10KW BLDC Motor] , Liquid cooling , 48V and controller: [EZ-B481000 , EZKkontrol PMSM Controller with wiring harness , 48V1000A]. I have started to design the dual-motor housing. I am sure you have your own ideas around motor housing but just in case you can reuse parts of the designs I have done I will post .dxf files here of some of the 2D parts I am creating in QCAD (for laser cutting). I have started with the adapter rings that will be attached to the motor and later have 4 x M6 sliding pins to be used for belt tensioning (they are the M5 holes you can see). Left to do after that is to design rear plate, front plate, feet and side binders. - spoke to early, the forum does not allow upload of .dxf file so if you can do with the file then let me know and I will use drop box to get file to you. Thanks / Modular Hippo
Wow - that is such a useful tool, big thank you as really did not know where to start on tat one
Hib Digimer, hope Christmas have been good and a Happy 2024 in advance!! Meant to ask you what propeller you went for, not had a chance to research this part so thought your choice was a good starting point
- I have just ordered the pulleys for the motors and went for a Ratio: 1 : 1.3 (Example: Small Top does 10 RPM and as a result the larger bottom will do 7.8 RPM.). I wish I could back this up with a really good reason why went for 1 : 1.3 but the truth is that I took a middle road between some of the professional solutions I have come across and 'The Neds' setup where he is running against a direct drive (no gearing at all). I guess I will find out if I need to change this down the line, at least it will get me of the ground. Happy 2024!! // Modular Hippo
Happy new year!Hib Digimer, hope Christmas have been good and a Happy 2024 in advance!! Meant to ask you what propeller you went for, not had a chance to research this part so thought your choice was a good starting point
Happy New 2024! - Big thank you for pointing me in the right direction, amazing looking prop, but as you say it loos expensive. Against the peak efficiency talked about (48V | 4902.92 W (RPM: 4183) you should be pretty much spot on with your reduction. Looks like I should have done my math before ordering my pulleys. Regardless of input the RPM does not fluctuate to much (between 3400-4700), it seems to be the torque that is increasing. Knowing that a propeller has a max RPM should have been my starting point. Saying that, still allot of 'Unknowns' that will come to light when propeller is in water doing it's job - will stick to what I got and modify if needs be. Jezz - 'propeller cavitation', news to me and VERY good information, thank you for that!
Note that the test RPMs are unloaded, I expect the loaded RPM to be lower. The quite I got for the 430mm (17") was £2,820.00, plus VAT and shipping. So it will be one of the single most expensive parts of the conversion, but it's the marine equivalent of "where the rubber meets the road", so if feels like it's one of the places to step up and pay the piper. Particularly in my case where regen is such an important part of my design.
Seen a few episode and all great stuff!! Dipping in and out as and when I get a breather which is rear these days. Will definitely keep an eye on future episodes related to the topic. With my boat build running in parallel the cost of the prop is way out of my budget so will have to go on the 'in the future wish list'. Small stepsNote that the test RPMs are unloaded, I expect the loaded RPM to be lower. The quite I got for the 430mm (17") was £2,820.00, plus VAT and shipping. So it will be one of the single most expensive parts of the conversion, but it's the marine equivalent of "where the rubber meets the road", so if feels like it's one of the places to step up and pay the piper. Particularly in my case where regen is such an important part of my design.
I'm not sure if you know about my channel, (I think it was mentioned earlier), but I am pushing as hard as I can to be in the water as soon as I can this coming season. If I can get in, I've got a whole suite of tests planned. So depending on how your project progresses, I might be able to get some tests done in time to be useful for you and your project.
Totally understandable. That prop is painfully spendy.Seen a few episode and all great stuff!! Dipping in and out as and when I get a breather which is rear these days. Will definitely keep an eye on future episodes related to the topic. With my boat build running in parallel the cost of the prop is way out of my budget so will have to go on the 'in the future wish list'. Small steps
Hi Yabert, great to meet you!! Tell us more about your project as interesting stuff!! I will definitely post more imagery etc. as soon as I get a breather
I will at some point do some YouTube stuff but as it it stands my Laptop that I edit on is running like a three legged dog so need to sort that first - Am tracking some build on https://modularhippo.com/kiribati-36-build/ for my own sanity but a bit chaotic at the moment as not updated it for a while. I believe will hold some interesting data around cost etc. once done as tracking that on a penny level. Below is an example of tiller shaft and some related components.
