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  1. boostjuice

    'D-Drive' - CVT utilising toothed gears only

    Fascinating! F6zE__J0YIU
  2. boostjuice

    A well sized/priced off-the-shelf 2-speed gearbox?

    I'm giving this a new thread because I think it might get missed being buried amidst this unrelated thread name. Here it is reposted again: Whats even cooler than the single ratio 'toughbox' series is the narrow and small enough for ebike mounting $239 2-speed dog-shift spur-gear box with...
  3. boostjuice

    Goldenmotor HPM5000B stator revision differences

    So as far as I can tell, Goldenmotor have at some point in time revised the stator design for their HPM5000B Axial Flux motor (and possibly also for the HPM10000B). ES member 'Gestalt' posted internal photos of this motor's stator/rotor in November 2009 showing 8 magnets and 24 teeth. Opening...
  4. boostjuice

    Custom Rear Hub Assby -LHS FW sprocket + retained disc brake

    So as part of my ongoing Goldenmotor HPM5000B build I decided I wanted my drivetrain to incorporate a LHS drive, freewheel isolated sprocket whilst retaining my rear disc brake. Being that my donor frame has 150x12mm dropouts (2008 Mongoose Black Diamond Double) I figured with a bit of custom...
  5. boostjuice

    Source for 4KW cont, 30 FET controllers for $72 delivered

    I think ive found a cheap source for a 30 FET (TO-220) controller as used on the 4KW e-rider scooter. Ridiculously cheap too through Aliexpress... Voltage: 24~72V Electric current: 120A Interphase current: 350A Power: Continuous rating 4KW maximum power: 6KW; Phase angle: 60/120 general...
  6. boostjuice

    Cyclone bearing failure

    The ID of the 14T gearbox OP shaft mounted ratchet freewheel is 30mmx1mm threaded. By moving up in size of your one-way needle bearing (new OD = 30mm), you no longer have space for an interface ring to sit between the one-way needle bearing OD and ratchet freewheel ID, so you will have to...
  7. boostjuice

    Destroyed! A warning to those using freewheel cranks....

    The above is the result of a Dicta 22T BMX Freewheel adapted to a chainring carrier used in a serial-driven freewheel crank setup. Freewheel was in service for only ~600klm (370miles) before seizing. It seized without warning, feet lost contact with the pedals, one pedal spinning over smacked...
  8. boostjuice

    Another cool 2spd Dog-box build

    I happened to stumble upon this blog project using a Kollmorgan and a REALLY nice 2 speed dog box (oil bath sealed!). As far as I can tell this hasn't already been scooped, however knowing the size of the ES community, the builder is probably a member here :| Enjoy! Parent blog...
  9. boostjuice

    Canberra Australia EV Festival Sept 2010 Photos/Vids

    http://www.apex.net.au/~mjroseby/Canberra_EV_Festival_2010/EVent-Canberra%20021.jpg http://www.apex.net.au/~mjroseby/Canberra_EV_Festival_2010/EVent-Canberra%20023.jpg http://www.apex.net.au/~mjroseby/Canberra_EV_Festival_2010/EVent-Canberra%20024.jpg...
  10. boostjuice

    Battery Cell Internal Resistance Meter

    http://www.chinasampo.cn/Digital-Multimeter/SM8124.htm http://cgi.ebay.com.au/SM8124-Voltmeter-of-Internal-Battery-Resistance_W0QQitemZ300394620665QQcmdZViewItemQQptZUK_BOI_Electrical_Test_Measurement_Equipment_ET?hash=item45f0ea26f9 Does any member here own or has any member used one of these...
  11. boostjuice

    Newly released Cyclone 3000Watt 48V Brushless motor

    I just thought i would let people know that Cyclone http://www.cyclone-tw.com/order.htm have recently added 3000Watt (4329Watts peak) motor kits to their existing product line which they claim can achieve speeds up to 90kph (54Mph). Interestingly the buyer has the option of purchasing them with...
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