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  1. Y

    Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

    Here you can find some pictures of an ATF flooded Motor after 2 years https://www.epowerforum.de/forum/threads/oelkuehlung-vor-und-nachteile.49/post-6125 Translation, what was damaged: "The paint on the stator and also the insulation of the cables, as well as the cord with which the windings...
  2. Y

    Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

    Current delta for idle full speed (~40 km/h, 305RPM) is about 0.2A @~41V, comparing silicone oil 20cSt (1,1A) and 100cSt (1.3A) in a G310. Unfortunately when measuring the 20cSt Oil I had smaller tires (schwalbe marathon supreme 622x32mm) with no/less profile vs (schwalbe g-one speed 622x35...
  3. Y

    Bafang G310 geared hub - 11:1 reduction ratio!!!

    Edit: went for 20cSt not 10
  4. Y

    Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

    For silicone oil it depends on the viscosity: I already posted some more infos about silicone oil in the ge10 thread, but thought i makes sense to post it here again: Source https://ecllube.com/resources-for-engineers/
  5. Y

    Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

    Why don't you go for higher cSt Silicone oil then? Had 20 cSt in a g310 (flash point avove 200°C)... Drag wasn't measurable. Leaking from the sealings was a problem though. Could imagine this would get worse with cSt <1. I'm now testing 100 cSt. So far no leaking, have not measured drag yet
  6. Y

    Bafang G310 geared hub - 11:1 reduction ratio!!!

    I went for 10 Cst pure Silicone Oil. Lower viscosity meens less drag, but i had small problems with leaking. Nothing wild but next time i would go for minimum 20 Cst. I also added PTFE for less friction in the gears. Silicone oil seems common for plastic (nylon) gears. I found a source with...
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