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    Brexit, for once some facts.

    Since he was both a lawyer and an administrator and a politician presumably he believed in nothing? Except the power of his own voice
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    Motor Torque question

    You need to go back to an A level physics book, for a better explanation but the principle is that the force on the rotor is BINL B magnetic field, I the current in a wire at right angle to the field, N the number of such wires (the number of turns in the winding,) L the length of wire in...
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    Brexit, for once some facts.

    Interesting that he has omitted the role of religious or clergy. They were as equally important in his day.
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    Update on N.I. e-bike regs.

    .. just taking that text at face value, that would be enabling legislation, not defining legislation. It is allowing for the possibility that a specific class of ebike be not considered as a motor vehicle, but does not define what that class is. So until it is so defined, it remains a motor...
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    Update on N.I. e-bike regs.

    In that benighted republic " down south " the law is standard eu . I can fully enjoy the full use of my 250w bosch motored motus as purchased from your excellent john hanna shop in lisburn.... I am happy to give that shop a plug. Perhaps you might like to bring your bike on your car across...
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    Brexit, for once some facts.

    ... in the off season?
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    Brexit, for once some facts.

    Are tanks useful scramblingup the Himalayas? Just asking
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    Brexit, for once some facts.

    . That is true but the jobs are not in any way productive and they suck energy from society. Border guards custom clearance agents idle lorry drivers at checkpoints additional clerks are all added expenses. The single market reduced all these and benefited European citizens particularly those...
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    Motor Torque question

    I am not sure what you are saying. A physically larger rotor , containing more material will be able to absorb more electrical power and create more mechanical power . But it is the voltage and amps coming from the controller which determines that electrical power and consequently the...
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    Motor Torque question

    . We don't have perpetual motion machines, so the effect will be that the bigger dimensioned electrical machine will rotate slower for the same electrical power input from your controller, but with a higher torque, so by the time you then put it through gears to speed up the chain speed you get...
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    Motor Torque question

    Can't argue with that...
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    Update on N.I. e-bike regs.

    .. that is a discussion you do not want to have in NI with a policeman.
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    Update on N.I. e-bike regs.

    ... As devils advocate here I am suggesting that just having that bike on the public highway is an offense, whether the motor was active or not. It does not have the necessary licence plates etc and you were not wearing a regulation motorbike helmet. Mr Plod would say you were in control of an...
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    Motor Torque question

    It cannot be the same. If the dimensions of the rotor change, the amounts of iron, area of windings , length of wire must all change. ..these are the parameters which actually create the torque in the rotor. At its most simplistic the larger rotor would be capable of more power.. size matters
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    Update on N.I. e-bike regs.

    .. that is what the mot is for... again my sympathies, it is a comedy of errors.
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    Update on N.I. e-bike regs.

    .. don't you get it? It's because they have no government sitting there is no politicians to embarrass
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    Battery Chargers

    Your wife seems a sensible wom Your wife seems a sensible woman but the price of charging the battery seems excessive. The battery absorbs 0.5kwhr for a full charge. Electricity costs say 20 pence per kwhr. Even if the charging process was only 75% efficient thats 15 pence
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    Cyclist hospitalised after riding across live rail

    That was horrific. At least the end was quick!. Was he an idiot or was he just ignorant?. It is easy to assume that everyone is aware of the risks. But coming back to more technical details, while the uk train system may be congested, there is nothing like a train every minute so that...
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    Cyclist hospitalised after riding across live rail

    I think it would actually be very doable. It would need a third insulated power line running the length of the entire line and a number of electromechanical relays with nice big contacts for each segment .As d8veh has pointed out the currents are a bit large for semiconductors, and in any event...
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    Cyclist hospitalised after riding across live rail

    Except it's not switching large currents. When the train has not arrived at the segemnt there is no current and when it has passed there is no current.so no arcing . Sort of like a giant Hornby trainset