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Esmedune

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  1. 86 Buffers
    Rebuilding a Hornby class 86 into 86214 "Sans Pareil" So many things to consider...
    3 hours ago, Esmedune said:

    These are mainly for an 86/6, this project is an 86/2, but the buffers  would be great!

     

    CAD is always flexible and I can always do detail parts for other sub-classes. Whatever you see in the image I shared above will be available separately i.e. as standalone products. 


  2. Wet slide transfers for large 80's numbers?
    Wet slide transfers for large 80's numbers?

    The L/L numbers I can bash out all day long via this customisable item here:

     

    https://www.railtec-models.com/showitem.php?id=3190

     

    Any L/L number you like as one easy transfer (and you get a spare). Most importantly, I use photos of the original loco and trace the numbers to get the spacing bang on (incl any wonky digits), so your model looks like the real thing. In the case of 235 above, you'll notice how there shouldn't be a gap between the 6 and 2, for example. Naturally at Railtec they're spot printed so there's none of that superfluous carrier film to fight with.

     

    As for the crest, unless somebody happens to have a perfectly square-on hi-res photo of this, then that wouldn't be feasible unfortunately.


  3. Coreless Motors
    Advice on Portiscap motors
    4 hours ago, AndyID said:

     

    Which only goes to prove you can't believe everything you read on the internet :D

     

    Cored and coreless motors have similar impedances for similar voltage ratings. The big difference is the much smaller inertia (flywheel) of coreless motors. As soon as you cut the power they slow down and the emf is immediately lowered. When the power is restored the current increases dramatically and that's the source of the heating effect.

     

    There are two ways to solve this with PWM. One is to increase the frequency so that the motor does not have so much time to slow down between pulses. That's what DCC decoders do. The other way is to put a flywheel on the motor.

    Hi,

     

    The heating effect is due to the lower inductance of the coreless motor, increasing the frequency of the PWM results in the current through the motor being lowered.

    Not all DCC decoders have the option for a higher frequency and putting a flywheel on the motor has little effect on coreless motor heating.

     

    Regards

     

    Nick


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