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In lugnet.parts.custom, Rob Hendrix wrote:
> Sorry for replying to my own post but I just thought of something that some
> of these wheels may need to incorporate. I bet there needs to be some sort
> of rubber traction "tire" on non-conducting wheels. I would hate to see all
> this get mocked up and then a 2 lb. train not be able to move because of
> slippage.
>
> Rob
Using a BBB wheel would be the best starting point. I know that many of the
train builders in Europe use the old spoked wheel, with a custom metal flanged
tire added. I'd recomend turning a standard BBB to remove the flang and a git of
the rim. And perhaps all of the rim on the back of the wheel.
I haven't seen the new blind drivers (flangeless) from BBB, but these might make
a better starting point. Either way the rim, plastic or metal could have a notch
to alow a O-ring or rubber band. But this would reduce your surface area for
electrical contact. LEGO has a very clever solution on thier 9v motor with the
lightly spring loaded metal rims.
I'd experimented with mounting BBBs on a early 9v car motor. It's the black
motor with 2 cross axel holes.
<http://www.peeron.com/pics/inv/custpics/5011.1078044583.jpg>
I connected it and a standard 9v train motor to a potrain power supply using
long wires. Running on parallel track the 9v train motor ran a bit over 2x
faster, even a low speed. I'd hoped the larger wheels on the motor box would
make up more the the difference in gearing.
I also played with power pick-ups. Using the ball and spring type and brass
wippers. These were not actually picking up power, as I was using unmodified
BBBs. But unless you use a very week spring, the resistance seemed much higher
then the wiper verion.
If you want higher torque and don't mind the lower speed, I think the 9v car
motor, is ideal for modifying. Otherwise I'd recomend modifying a 9v train
motor. This assumes that you have wheels whith metal flanges. The later with a
new set of larger metal flang, and a swapped out plastic center may be the best
bet.
Mat
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Message is in Reply To:
 | | Re: Idea for new train wheel
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| Sorry for replying to my own post but I just thought of something that some of these wheels may need to incorporate. I bet there needs to be some sort of rubber traction "tire" on non-conducting wheels. I would hate to see all this get mocked up and (...) (20 years ago, 30-Jul-04, to lugnet.parts.custom)
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