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  1. ayedurand

    Strange Diode Use on Battery Heater (Brammo Empulse)

    How does a diode connected transistor work as a temperature sensor? (edit) -Nevermind, I'm looking at a TI application note that explains it. Fascinating stuff. I already bought the big cells. They fit and weigh less than the originals but I need to reengineer the individual modules as the...
  2. ayedurand

    Strange Diode Use on Battery Heater (Brammo Empulse)

    I bought a Brammo Empulse TTR with a bad battery. The bike has about 1700miles in 10 years. I looked at the log file and found the cell that had the problem (swollen and ruptured). So, I decided that I'd rebuild the entirety of the battery pack. I've purchased some 148 Ah CATL cells and now need...
  3. ayedurand

    Qs 138 90H at 120 volts

    Would you please point me at the math that shows the relationship between rotor speed and heat generation? I'm assuming this is for an equivalent motor power input but would like to understand the assumptions better.
  4. ayedurand

    EEB bomber Los Angeles

    Hi, I am sorely tempted but I need to have it shipped to MN. Would you be willing to look into crating the machine? I'd prepay for delivery via LTL. Also, payment via PayPal/Venmo/Zelle. Your choice. My request would be a build sheet. If you've already got a build log somewhere, I'll take...
  5. ayedurand

    Schwinn 4/6 bangers dropouts hold 10kw

    So I bought a 4-Banger. What motor did you have installed in the bike? I'm wishing for an H4080 but budget may dictate other options.
  6. ayedurand

    Schwinn 4/6 bangers dropouts hold 10kw

    What was the distance between dropouts? I'm thinking of building a 4-Banger.
  7. ayedurand

    Toro 48V 4Ah Battery & Charger

    So I have a bunch of 88509 batteries for Toro line trimmers. I'm planning on using them for ebikes for my nephews. I'm planning on running three of them in parallel (maybe four). They're 12s2p packs made up of Sanyo ur18650rx cells (attached). The battery pack has what appears to be a...
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