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  1. G

    ebike hub motor for marine propulsion

    Gentlemen Thank you both for your suggestions. Alan The appeal of the hub motor, for me, is low noise, splash resistant, no reduction drive losses and easy installation, I have a good machine shop to hand. I plan to mount the motor fairly low on a cross beam to minimise the curve of the...
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    ebike hub motor for marine propulsion

    Gentlemen Last year I constructed an electric outboard leg based on a Turnigy 80100 motor with a 3:1 reduction belt drive which I operate at around 300w, with the option of 750W when necessary. Having recently constructed two PV panels which output 170w in good sunlight and in excess of 100w...
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    Diy Brushless outboard? I have some questions.

    Infinity I'm not the best person to advise on ESC's, hopefully one of the Guru's will step up to the plate. FWIW, I'm currently using a Turnigy 150 opto ESC which is linked to a servo tester for throttle control, so far so good, but I'm drawing very little current compared to model RC...
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    Diy Brushless outboard? I have some questions.

    Infinity Having followed a similar path to the one you are proposing, I can help with some of your questions. I gather you are planning to use a standard outboard leg, if so, you will find the gearing is a little too high and the space for a prop below the anti ventilation plate will limit the...
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    Reversable Brushless motor controller

    Dogman Thanks for your suggestion. GeoffV
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    Reversable Brushless motor controller

    Gentlemen I've been running a large Turnigy outrunner in an electric outboard motor leg with different RC ESC's and have become tired of ESC problems (another story). I wish to use an electric bike controller but need to be able to reverse the motor direction which I currently achieved with...
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    Suitable mounting for PV cells

    After much deliberation I finally made a start on my proposed PV panels. Non of the tradition methods of construction seemed best suited to my needs being either too heavy or to expensive so I'm trying a different approach, for better or for worse! I purchase two pieces of polycarbonate...
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    Taming the twist grip throttle

    Teklektik Thanks for pointing out this option, I will give it a try. GeoffV
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    Taming the twist grip throttle

    Gentlemen Thanks once again for your contributions. I have incorporated an 18 turn 1k pot in the negative lead to the hall sensor, as suggested by Fechter, which has permitted me to remove almost all the dead space at the start of the throttle rotation. I also took advice from Dogman, thanks...
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    Taming the twist grip throttle

    Gwhy You bring good news, but unfortunately more questions as well. I mentioned earlier that I have a CA version 2.25 and have read the manual fairly carefully without spotting the facility to program it as you suggest, can you or any other readers of this thread throw any more light on the...
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    Taming the twist grip throttle

    Gentlemen Thank you for going to the trouble of replying to my question. Jeremy You have confirmed my concerns about the capacitor idea, an exponential voltage ramp seemed to me a better route to try, but I value a second opinion. I have tried controlling the battery current with a CA version...
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    Taming the twist grip throttle

    Gentlemen Before anyone starts whinging about not searching this Forum, I've spent hours looking for an answer, without success so far, now that's out of the way here's the question. My understanding is that the typical ebike controllers are simply speed controllers, which is fine if you have...
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    E.S. bottom bracket drive.

    Sir I would be very suprised if the GNG primary drive belt with that horrible idler wheel achieves anything like 98% and to make matters worse it only survives a fracton of the time of a worm gear set.
  14. G

    E.S. bottom bracket drive.

    Sorry for being a bit later arriving at this party but am fairly new to ebikes, I have a 250w rear hub bike and a 1000w front hub MTB (Ugh). I do have quite a lot of experience in design and machining and am clear in my own mind that mid drive is the way forward and have therefore decided to...
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    Opinion on LiFePo4 supplier

    scorpion They sure do look the same, will have to investigate. thanks GeoffV
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    Opinion on LiFePo4 supplier

    dnmun I sorry you feel it necessary to respond to my threads with such an agressive attitude which leaves me with the impression that you think you are one of the few people on this Planet that is capable of logical, rational, thought. If there really is 'nothing interesting to comment on'...
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    Opinion on LiFePo4 supplier

    dogman Thank you for your reply, I am a little suprised at the lack of reponse to my thread, it may be as you suggest that this supplier is not well known, yet their website covers a lot of electronics. Having travelled far and wide I have much respect for the Thai people and am willing to try...
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    Opinion on LiFePo4 supplier

    Gentlemen I am still looking for a supplier of good LiFePo4 cells and BMS, came across this one, does anybody on ES have experience with, or opinions on their products? http://www.servovision.com/Battery/Batterry%20LithiumFerrumPhosphate%20LiFePo4%20cell%20aluminium.html GeoffV
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    LiFePo 48v pack with failed cell?

    Gentlemen please. This discussion could rage on without conclusion. If I have understood matters correctly, both BMS and non BMS routes have merits and dangers, on the one hand Chinese BMS have an unfavourable reputation regarding reliability. On the other hand failure to monitor the pack...
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    LiFePo 48v pack with failed cell?

    dnmun et al. Thanks for all the advise which has resulted in a succesfull recovery. The battery was a Vpower 48v 10 Ah 16S 11P with 18650 cells, two groups had failed, probably due to damaged sense leads and to the obliterated BMS. I have removed the two groups of 11P and now have a very...
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    LiFePo 48v pack with failed cell?

    I've not yet stripped the pack and it has no visible damage, I have no idea how the previous owner was careless enough to short the BMS such that some components have be obliterated (please see picture above). He did say that he had continued to use the bike, presumably having bypassed the BMS...
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    LiFePo 48v pack with failed cell?

    dnmun I'm sorry, but I don't understand yout comments about 'two strikes against you'? The old pack with the burnt out BMS may well be a Vpower as there were remnants of their sticker still attached to the battery. I was simply saying, that with the advice received, it would be a valuable...
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    LiFePo 48v pack with failed cell?

    Gentlemen Many thanks for taking the trouble to help a newbie climb the step part of yet another learning curve. The advice you have offered is steering me towards stripping the old pack and removing the dead cells such that I have a useable lower voltage pack, this will be valuable experience...
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    LiFePo 48v pack with failed cell?

    Gentlemen I recently aquired a very secondhand but quality bike from a well known online aution with a 1000w hub conversion advertised as ' motor and battery in working order'. After collection I find the BMS has been shorted, destroying some of the suface mount components and two of the...
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    Weed shedding props

    Permagne Thank you for you kind comments, I'm sure the powers that be will not be too upset by my including information about my Stirling Cycle engine, after all they have the potential to be Solar heated. I am currently fitting some upgrades to the engine which dispite its current low output...
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