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Post by eddy on Jun 3, 2020 12:56:49 GMT
Had my first test run with the spanish Vespa (El Vespa) some days ago. It's got some immense power. No licence plates yet, so just tested in the neighborhood. Some pictures of it before it goes back into the basement for some final touches (20+ final touches ) hopefully it's back out in the sunshine within a few months.
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Post by eddy on Jun 3, 2020 12:57:32 GMT
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Post by eddy on Jun 3, 2020 13:07:09 GMT
Even with a few bonus early shots of the battery pack in the making. You can even see my homemade spot welder for welding the cells together. The battery pack is a 16 in series, 11 in parallell configuration by the way (176 cells), 60V / 38.5 Ah capacity. Motor is 4000W nominal power. Draws easily north of 8kW peak.
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Post by eddy on Jun 3, 2020 13:13:44 GMT
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Post by tzsteve on Jun 3, 2020 20:10:38 GMT
An interesting little project 8kw about 10 bhp Just enough for some fun I'm guessing the motor is lighter than the standard, nice looking brake
Plenty of pics please
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Post by eddy on Jun 5, 2020 6:45:21 GMT
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Post by eddy on Jun 5, 2020 6:47:38 GMT
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Post by eddy on Jun 5, 2020 7:16:05 GMT
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Post by eddy on Jun 5, 2020 7:20:06 GMT
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Post by eddy on Jun 5, 2020 7:22:20 GMT
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Post by eddy on Jun 5, 2020 7:25:40 GMT
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Post by eddy on Jun 5, 2020 7:29:32 GMT
Control room the way I thought it was going to end up. Pictures will show that it certainly did not end up like that. That black little box was my first try on a cable-to-potmeter throttle. Also a detail shot of battery main discharge wire, and testing of complete battery pack at my brothers job. The BMS blew one transistor at 100A (roughly 6kW). It was rated for 150A continuous, so this was my first warning sign that I couldn't trust this BMS. better one on its way as we speak.
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Post by tzsteve on Jun 5, 2020 8:33:49 GMT
Those transistors are rated at absolutely the most optimistic and assume you have massive heat sinks and fan cooling, I've had similar problems with amplifiers in the past.
I like the work that your doing on this. Any idea on the amount of weight you are saving.
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Post by eddy on Jun 5, 2020 11:20:04 GMT
Those transistors are rated at absolutely the most optimistic and assume you have massive heat sinks and fan cooling, I've had similar problems with amplifiers in the past. I like the work that your doing on this. Any idea on the amount of weight you are saving. the transistors on the new BMS will have better working conditions, located in a stream of fresh(er) air, mounted to an aluminium surface, and with heatsink designed into the module. No fans though. There will be no weight savings I think. If you have an approximate weight of a complete smallie engine I will be happy to calculate though. the hub motor is 15kgs and the battery pack is 10+ kg. Swingarm also adds a few hundred grams I suppose. Oh and add BMS, contactor, DC-Dc converter. Potentially also a charger at around 1kg. I think all in all the scooter is heavier, but I reckon it has double the torque as my tuned 130cc Polini smallie has. I guess the way it will handle will take a small toll though.
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Post by tzsteve on Jun 6, 2020 15:53:49 GMT
I think electric is free from uk road tax
I do like this project, a damned good idea mate quite a bit of work and many things to work out. 10 years from now all the petrol fuelled engines will be getting taken out and Will be replaced with electric kits, It would be interesting to see this on a dyno would the expert tell you what jets to use lol.
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Post by eddy on Jun 15, 2020 10:22:19 GMT
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Post by eddy on Jun 15, 2020 11:15:20 GMT
Test fitting of spherical bearing for attachment of shock, and temporary fake leather case for the battery pack.
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Post by tzsteve on Jun 19, 2020 13:51:32 GMT
Interesting post, And definitely a different project
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Post by eddy on Jun 18, 2021 8:19:22 GMT
Finally done and approved!
Trying my best to upload pictures, but haven't found a great solution yet. The whole forum seems to have exceeded its max. attachment limit.
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Post by tzsteve on Jun 18, 2021 16:49:41 GMT
. Any idea on the amount of weight you are saving. There will be no weight savings I think. If you have an approximate weight of a complete smallie engine I will be happy to calculate though. the hub motor is 15kgs and the battery pack is 10+ kg. Swingarm also adds a few hundred grams I suppose. Oh and add BMS, contactor, DC-Dc converter. Potentially also a charger at around 1kg. I think all in all the scooter is heavier, but I reckon it has double the torque as my tuned 130cc Polini smallie has. I guess the way it will handle will take a small toll though. i think most smallies come in at about 65Kg
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