
1471 Sir Frederick Banbury
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they shouldn't have a problem. 29,000 RPM/3 Volts = 9,667 KV, so 9,667 x 12 = 116,000 potential RPM, but I should really get a couple samples to test and a laser tachometer to get real world data. If we add the potential for ball bearings, silver graphite brushes, and better balancing on top of that, how fast can 12 Volts get us? That's what keeps me up at night at least.
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I'm probably going to buy a new plasma dash off of ebay and a laser tachometer to run a test for the fastest brushed motor available. Hilariously, I wont really ever end up using the speed these demons make (at least in raw form), but will be using them mostly to be geared down >100:1 ratio for use in model trains and the likes of. The reason for that, is to make something that can goat very slow speeds smoothly and so that flywheels can fully smooth out the torque, which is the exact opposite of their designed function (4WD), but they are well suited for such uses.
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Thanks. I saw the Doyusha used in Thomas the Tank Engine toys oddly enough, as those trains were being used as a way to demonstrate the speed difference. I have one Doyusha that says 75k, but it struggles to get going in the first place, and has brass brushes that wear out quick! here is that video for those who were wondering: Tomy Trackmaster Motor swap comparison Plarail プラレール (youtube.com) its a really good visual demonstration of the speed difference
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I think I did also figure out a little trick to get motors to get 1.5 times more speed. It was from trying to use an armature as an electromagnet to find a tiny screw in carpet. the result is having almost no resistance to turning by hand and thus a higher top end speed, more noise, and a surprisingly long wait for the coasting motor to stop, oh and did I mention brush and bearing wear!
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While I dont do much 4WD, I love the Plasma Dash motor, and use it in many applications. Imagine my confusion when its out of stock at Hobbytown and everywhere else. The 4WD wiki doesn't even have any info, I went to the Tamiya website where its discontinued(?) Why would Tamiya stop producing this marvel, and why has nobody on any forum has asked about it? Now it goes for a minimum of 60$ USD on Ebay! How Unfortunate.