I know the obstacles are not super technical but we're getting there. Once I get my front axle improvement in and better tires, I should see some more improvements.
Also, my electronics are from 25 years ago. I'm running a Futaba 2PL FM Tx/Rx, an old Novak XRS speed controller and a Trinity 20T Monster Stock Pro with a 8.4V 8 cell NiMH battery pack. The servo is new, it's just an Amazon special LW-30.
This is my Crawler MK4. MK3 was my first built prototype, MK1 and MK2 were never built, just a test bed for gears, axles and links really. Anyhow, it's all 100% 3D printed; gears, driveshafts, axles shafts, axle housing, ball end link, all or it. Obviously the M3 screws/nuts, bearing, shocks and tires at not 3D printed. I wanted to push the limits of what you can do with PLA and PETG. Turns out, it's alot!
It's a 1:10 scale, about the same dimensions as a TRX-4. Wheel base is 12.5", axles are portal axles.
So far I'm super impressed with it's performance. This is something I design from zero, nothing. It's been a 3 years journey on and off to get to this point.
The rear axle is a spool, where the front axle has an open diff. My design for the front axle outer "U-Joints" are 3D printed, thin'ish and it's the weakest link so far. I'm working on improving that in-order to use a spool up front.
Also, my final drive is 40:1, it should be be like 60:1 or more, working on that. Also the tires I have are cheap $20 amazon 2.2" tires. Looking to get higher quality set.
When people ask what you can do with the 3D printer. This. This is what you do with it!
Thanks for looking!