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  1. Z

    Zappy's Axial flux Kick(ass)Scooter

    The gear ratio is 14t to 98T to start with and should give around 70km/hr top speed with good acceleration. Thanks to Pickle for letting me make a mess in his man cave, baby sitting my old lathe and welder and always helping out. He's funny too.
  2. Z

    Zappy's Axial flux Kick(ass)Scooter

    I am the 1st to admit scootzilla was crap and dangerous. It had 6000w, light switch type throttle control, a steep steering head angle, short wheelbase and cable rim caliper brakes operating on a plastic front wheel and my mates weigh up to 140kg and had 10 beers under their belt! I think the...
  3. Z

    Zappy's Axial flux Kick(ass)Scooter

    The backing iron shows some flux leakage in the high tech ( look the cap screw sticks to it ) test. The stator laminations are .5mm thick Rotor pole and weight
  4. Z

    Zappy's Axial flux Kick(ass)Scooter

    The motor core is about 4.7kg . So a fair bit of weight could be lost by discarding a lot of the motor chassis, if you can be bothered trying that hard. You could also make a aluminium centre hub to mount the magnetic disk/backing iron. The small integral fan starts to move a bit of air at...
  5. Z

    Zappy's Axial flux Kick(ass)Scooter

    Yes John , The kv is very close to 100rpm/volt and I should have put up the phase / phase resistance but I lost the scrap of paper and the motor and chassis is in a 3rd world country now. So that is very unhelpful. :oops: So the motor pulled about 8000rpm at 80volts for an extended period of...
  6. Z

    Zappy's Axial flux Kick(ass)Scooter

    This came about by a little 3kw golden motor arriving in the mail, from my big little brother. We have been on the look out for a suitable high quality mid drive motor for high performance down hill type bikes in the 8-12kw region that weigh in under 5kg. To keep things simple we wanted to use...
  7. Z

    Small water cooling pump test

    The dimensions are on the link. Inlet 9mm , outlet 7mm Zappy
  8. Z

    My new Colossus Water Cooled motor

    Hi splinter, What KV did you pick? and for what pack voltage? Zappy
  9. Z

    How to mod magic pie 2,9c,conis (now with cooling vane mods)

    Good work cowardlyduck! The little fans make a big difference at slow speeds and for a quick cool down.(unvented stators after a good spanking stay very hot for a long time and can heat soak your magnets). At high speeds fans seem to make less difference. In Canberra at this time of year, high...
  10. Z

    How to mod magic pie 2,9c,conis (now with cooling vane mods)

    24s of A123 20ah prismatics. I have used a few ecrazyman 24fet controllers but have had a few reliability issues with blown fets(one just stopped today from plugging it into my 7000w killer kick scooter! :twisted: but I had just dropped it off the bench :cry: ) or usually a KEB 8KW Kelly...
  11. Z

    How to mod magic pie 2,9c,conis (now with cooling vane mods)

    Kareleski has PM me about installing computer fans into a magic pie, so I have put up a few old photos. I run 4 fans dimensions 50mm X 50mm by 10 mm thick, 12v run in series straight off the main battery pack voltage of 80v. They seem reliable even at 20volts. 5,6 or 8 fans could fit. You do...
  12. Z

    3<->8 kW motor comparsion

    Vasi said The version 1 cro lams are .5mm the version 2-3 cro lams are .35mm . For some sense of perspective, just as a comparison, I would just like to repeat the no load losses for a version 1 cro motor (at 10.6kg with no spokes or rim) and 79.2 volts(24s lifepo4) no load losses are around...
  13. Z

    3<->8 kW motor comparsion

    Vasalisk said I think you are right! 63 stator teeth. It looks very similar to a version 3 cro manufacturing style, only really big diameter. Thanks for sharing, have fun with this heavy beast. Zappy
  14. Z

    The helpful 9C wire upgrade thread, explicit DIY pictures.

    This stuff can also help. The trade name is monkey cum(?). Zappy
  15. Z

    8.4KG CROMOTOR & COMPARISON OF V1,V2,V3

    Drawing of modified Cro motor flux stator ring. I have made 3 similar to this. Machining off the original spoke flanges and re drilling spoke holes seems like a bit of a hassle but this saves around 350grams and it doesn't really take very long. You also have the option for different spoke...
  16. Z

    Dual rotor axial flux motor design

    Fibre filled PEEK seems like a good candidate for the chassis. It's properties are approaching soft metals. Its price is up there with gold plated silver wire though. G.O. steel would seem to have a very large advantage for this design. The stator stack could literally be guillotined up (very...
  17. Z

    Dual rotor axial flux motor design

    https://www.google.com.au/#newwindow=1&q=low+inertia+axial+flux+servo&safe=active low inertia axial flux design paper. Zappy
  18. Z

    Miles' 125mm inrunner design

    Thanks.
  19. Z

    Miles' 125mm inrunner design

    Hi Miles , what size rectangular wire is in this last 4T drawing?(I do have a roll of 1.3mm round magnetic wire). and what size magnets approximately? and approx KV for 4T? Thanks for all your work, this would be a very good motor. Zappy
  20. Z

    rewinding a Cromotor V2 for higher efficiency

    The version 2 and 3 cro motors have the same size wire and turn count as the version 1, but version 2 and 3 has a very different stator punching with a slightly deeper slot (approximately 1mm) so it stands to reason there may be some more space? Do some accurate measurements and drawings and...
  21. Z

    Miles' 125mm inrunner design

    The axial motor seems to share some of the benefits of outrunners. Your solution for strip copper windings with jumper cables is exactly what i had envisaged without knowing you had already drawn it :roll: . A comparison of cobalt(high flux, high loss, high cost) laminations and something like...
  22. Z

    Miles' 125mm inrunner design

    I still think this would be very hard to wind. Trying to scale off the screen, 4 turns of 6.5 x .8 strip with soldered 8awg interconnects still can't match this. :cry: I think this motor with some large thin axial fins or thin water jacket would be great(fins cut away where space is needed)...
  23. Z

    Miles' 125mm inrunner design

    That would be good, and maybe a bit more real world to try and wind. Thanks for your efforts.
  24. Z

    Miles' 125mm inrunner design

    Thanks for your reply Miles, Something similar to the Nova 15 is very close to this. 24s lifepo4 or 79.2Volts seems to be a pretty good fit with the available controller fets etc. and is a fairly standard battery pack of around 1500w/hours of A123. 30Nm would be really good. What sort of...
  25. Z

    Miles' 125mm inrunner design

    Hi Miles, this is very good news! I have kept coming back to this design for any new updates. I have really enjoyed watching the development of the ‘Miles 90’ but to me the 1-2Kw motor niche is already saturated with much inferior, but dirt cheap competition. I apologise for the following...
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