We took Kala's buggy and the red/yellow Baja truck up into the woods over the weekend for a walk and a drive.
A children's adventure park has been built there in recent times, and they use a fair quantity of wood chippings as ground safety protection underneath and around the rides (a ropeslide and swing basket etc). There's a large amount of this material piled up nearby, currently surplus to immediate use. This has turned itself over the winter into a ready made and nicely surfaced off-road RC course!
Kala's pink Rising Fighter buggy has amazed everyone with its toughness. After two years of good use it still remains completely unbroken. The only thing it ever does is to bend its wire steering arms after a hard impact, these are easily straightened by finger power alone, and there's no need to remove them from the car to do this.
The Baja (King or Champ - take your pick!) truck is back with a stock 27 turn SH motor. I had it running with a 19 turn MRI wet magnet motor for a while, but in a wooded or other off-road environment this got so hot that it melted the soldered joints of the leads connecting power to it. Currently it's got a hot-glue locked differential in the rear axle and a ball differential in the front. For me this is quite a good compromise between grip and steering ability, and has the advantage of spinning the car around (in the desired steering direction) when you take the power off suddenly. This is a very good feature when it comes to obstacle collision avoidance!
The buggy has similar straight line performance to the truck, but the steering at pretty much any speed is nowhere near as accurate. The area where the buggy really wins out is runtime, an 1800 Mah battery pack gives nearly half-an-hour of fairly quick driving, whereas the TL-01 based truck kills a 3700 Mah battery in under 20 minutes doing the same things.
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