Thanks for the props CommanderFox! Give us the chance to show you what it can do before we start going back to all-LEGO parts. This initial prototype has steel parts, but the final form will have an aircraft-aluminum chassis and carbon-fiber suspension. It will still have all the LEGO external parts and be exactly the same size as the original LEGO model, but these internals will allow us to handle steep inclines, off-cambers, and step over obstacles. It has a high-torque motor at every joint, and a lithium-polymer battery that can source 36 Amps. It should be a pretty serious piece of hardware! :classic: Can't wait to show you.
That said, I'm blown away by how well the all-LEGO walkers work in the vids that were shared in this thread.
Here's a video of the steel prototype parts being cut by a 1500W laser. It's kind of reminiscent of the droid factories.
Thanks man. I actually used to live in Boston from 2001-2005. Love it there.
Grimmy, if you're really committed to the RF solution, the easiest path (but to your point, not the cheapest) might be to use a Radio/Receiver/Electronic-Speed-Controller kit. You could wire the LEGO drive motor directly to the speed controller, use any battery over 6V, and it'd come with a steering servo that you could easily connect to your LEGO rack and pinion with the right sized screw. Your solution would work, but the electronics would probably be a little more tricky.
Here's an example of the radio/receiver/esc. It costs $85 usd.
http://www3.towerhobbies.com/cgi-bin/wti00...XASX4**&P=7