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  1. R

    Power Transfer through spinning axle

    Try searching for "slip ring". A slip ring is a rotary coupling used to transfer electric current from a stationary unit to a rotating unit. Either the brushes or the rings are stationary and the other component rotates.
  2. R

    What did you do to your ebike today?

    I am going to haul trash to the dumpsters and look for some treasure to haul back.
  3. R

    wiring 12v sla batteries help please

    You can use a 12v charger IF you disconnect one of the batteries when charging and charge each battery separately. I have this setup on my bike and use a 12v charger.
  4. R

    motor noise

    Yep, grunting might be a good word. It is a brushless, direct drive, hub motor. Does anyone have any experience with Yongkang motors of this type.
  5. R

    motor noise

    Thanks Dan, it is not a grinding noise. I have heard the term "cogging" used before. You can feel a vibration as well as the noise. I live in the boondocks of Idaho and I there aren't any other electric bikes around for me to compare as far as motor noise is concerned. Maybe most motors make...
  6. R

    motor noise

    A friend just bought a Pedillac pedicab. It has a Yongkang 500w hub motor with 48 volt SLA batteries. I rode it the other day and was shocked at the noise the motor makes. I have a Crystalyte 408 that is very quiet. Is this noise normal for a Yongkang motor or does my friend have a problem.
  7. R

    Let's see some e-bikes doing some work!

    My bike is a front wheel drive Crystalyte X-408F motor with 3 12V-35AH SLA batteries mounted on the trailer. Not much for speed, but I have hauled some very heavy loads.
  8. R

    DIY bike trailer designs??

    I made this trailer entirely from dumpster materials including the tires, tubes and wheels. May not look like much, but it works great. It carries heavy loads plus 70# of SLA batteries.
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