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    Two Speed hubs - Bafang ??

    Hi - Did the two speed thing go anywhere? there was an Xonda that had problems, & I see Bafang is offering the H700. Has anyone tried or seen it. Or come to that were the Xonda's faults sorted. Or is it better to just throw a few more amps into a single speed geared eg. the Q128 from...
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    Series Parallel Battery & Open voltage controller

    As more amps = more torque & more volts = more speed, I came across an 'open voltage controller' - I thought of this, two nom 36v batts @ 15A max each, to be connected via relays either in series or parallel to give 72v @ 15A for high speed on the flat or 36v @ 30A for serious hill climbs. I...
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    Old 408 Motor, Max Amps it can take?

    I have a 408 in a 20'' wheel lying around. Dates from about 07 but little used. It is in its basic set up with factory 9 wire feed cable. Reading that he newer 408's can take many more amps & produce more torque I am wondering if the old and new models are similar inside. I see the motor phase...
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    Shunting Vs Smart BMS? Budget 18650 Build

    I am looking for as simple & reliable a BMS as possible for a build using 18650 cells. I read of the Clean Power LLC BMS & would like something similar ideally with the LED to report when each cell or parallel group of cells is shunting (thus if a group cannot reach shunting voltage then that is...
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    My & Wifes bikes

    My main bikes, first is 20'' folder with Golden HBM / small magic pie motor & home made 36v lipo4 pack, Second is 26'' with Q100 rear & Tongxin 175 rpm front (50+Nm if both running, & Lipo added)
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    Express Rail Freight China to Europe

    I read of a weekly container rail freight from Chengzhu to a European distribution hub, UPS & DHL are involved, said to be 50 to 70% cheaper than by air, journey takes two weeks. Could this be a good way of importing Lithium cells or batts at a better price? I have been on SLA on cost grounds...
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    Q 100 201 rpm Motor Performance Graph???

    Does anyone know where there is a motor performance graph for the Q100 36v 201 rpm, cannot find this anywhere, have found one for the 325 rpm one. I am mainly interested in the rpm & amps point where max torque is given out. Also if poss an estimation of the added torque if the stock 250w 14/15...
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    5A Charger & Voltage Adjustment

    I am looking for a 5A charger with a variable voltage adjustment. I need to take 22s 1p of Ni Zn cells to 1.96V each, Thus 43.1V. I have been offered this charger @ 4.5A with the ability to have set the voltage as I wish but not then change it. Also it is available to order with or without a cut...
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    Help Needed With SLA Charger to CC / CV conversion

    Hi, I have had the offer of a very good deal on a new type of battery but the maker does not supply a charger. he has though given me the charging algorithm preferred by the factory. This is (1) 0.5C constant current for 100 mins, temp must not exceed 50 deg C, rest battpack for 5 mins, then...
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    Powergenix Nickel Zinc Batts

    Hi, I have been following the developments in the above, has anyone any experience of these batts, it seems a company called Powergenix has licensed Ampex of HK to make them, & the problems of the anode 'whiskering up' are claimed to be solved. Energy density 80 Wh per Kg - twice that of SLA but...
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    12 Tooth Freewheel & Unite Motor Adaptors

    Found this by accident, is a 12t freewheel, has adapter for Unite MY1016 / MY1018 11mm shaft. Smallest freewheel otherwise is Odyssey 13t or 14t BMX (13t was withdrawn for a time)...
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    Two Mech Speed Hubmotor

    I came across this by accident, maybe is a two gear hubbie? http://xiongdamotor.en.alibaba.com/product/1582411347-220560510/Great_Power_Energy_Saving_Double_speed_BLDC_E_bicycle_Hub_Motor.html I do seem to remember that one from Sturmey was under development, & Justin of ebikes ca had a patent...
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    Hub Motor Front Drive Sturmey 3 Speed

    Hi, I have a spare Sturmey 3 speed wheel & a MTB that can take this in the front forks, along with several alternative sprockets for the Sturmey. I have been thinking of using a small geared unspoked hubmotor (eg the Q128) as a driver, (the rear version carries a sprocket that drives the hub...
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    No Halls (sensorless) & Internal Freewheel

    I have been offered a 'no halls' motor by maker Tongxin, in the past their product has contained a freewheel meaning the motor was not ground driven when not energised (very good) BUT they then used a halls system to initally kick the motor off. I cannot see how a motor that is not 'land driven'...
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    DIY Using Pouch Cells ?

    Hoping to break away from SLA I am looking at building a pack from these cells http://www.bmsbattery.com/lifepo4-cell/314-lifepo4-7070260-polymer-cell.html Problems can be in two areas; 1) Termination of tabs (depends on if tabs are Alu = hard to solder, or Nickel = easy) otherwise will try...
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    Reversing Ecrazyman Brushless 350w

    Need advice re. reversing an ecrazyman 350w brushless controller, Keywin says he can do this or if I do it - I need to 'solder a 1N 4007 on PCB DX3, connect X3 to GND' No idea what a 1N 4007 is, let alone what is involved ! I have never even yet seen one of his controllers. Reason for...
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    Unite Gearmotor Supplier to or in UK ??

    Have been thinking on a frontdrive for some time, have saved most bits inc a Sturmey AW3 & 22t sprocket, plus a bike with front forks able to take above. I had a unite 1016 350w gearmotor on order from Brett White but he is no longer trading. I want to go with 36v as I already have batts &...
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    Goldenmotor Hall Sensor Question

    Hi All, New guy here, have a golden HBM 36 brushless, fried the controller on a long hill & am trying to determine if the motor is still OK. Have 0.4 ohm res reading across any two of the three phase wires & inf. to the casing. took cover off motor - there is no sign or smell of burning so think...
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