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About AndyCW

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    Lego, automotive performance, games, RC planes, unmanned aviation


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  1. Torsion bar It's easy to implement with lego and prevalent on trailers.
  2. All things equal, when you have similar output speeds, you will get similar torque. In this case you are using the same motor. Friction becomes more of an issue the faster things turn To minimize losses through a gear exchange, use the largest gears possible (most teeth) and brace the gear enclosure to the maximum extent possible 12t to 36t (3:1) is more efficient than 8t to 24t (3:1) This is one of the reasons that the knob gear is so poor
  3. I know that the angled steering links help with ackerman, but they also induce slop. I've found several things to reduce slop. Try to make the steering links parallel to the axle. Make the steering arm on the portal hub longer, but this reduces steering angle. Mount servo directly on axle If you can put in some kingpin inclination and caster angle, then the slop won't be as noticeable because the wheels will 'want' to go straight ahead.
  4. Purism

    I use 3d printed parts, non-lego tires, 3s lipo batteries, a Pololu TRex DMC, a Traxas 2.4 GHz radio, and sometimes even my SBrick. I do not alter parts (generally) and I do not use Kragle. I also strive to keep the non-lego parts to a minimum in my MOCs. If I can 'make it happen' with lego, then I'll have no need to resort to non-lego. I'll try numerous iterations of a lego design and only if they have all failed do I look at non-lego solutions. I'm not a purist by any measure, but do understand it.
  5. I love this project. For some reason the body work reminds me of a TVR.
  6. [MOC] Trial Truck

    Nice. I appreciate you photography and videography skills. I too think that you could easily increase the speed due to the torque of the xl motor.
  7. Zero's workshop

    Welcome 'Home'
  8. Those numbers mean 265/35/19 = 265 mm wide / 35% of that as sidewall (265 x 0.35 = 92.75) / fitted on a 19 inch wheel 19x9.5 = 19 inch wheel diameter and 9.5 inch wheel width v/r Andy
  9. Here are those hubs with the ball adaptors from 8880. This iteration is far better than V1 and should hold up to a great deal of abuse. Basically the same architecture was used in this MOC. With the ball part installed, I can not separate the wheel adaptor from the hub, but removal of the ball may weaken the structure. After all, the ridge that holds the wheel adaptor to the hub is preventing from deflecting by the presence of the ball. v/r Andy
  10. MRP_, The part that Efferman posted is stronger and has a closer pivot than your concept. I have a pair and they 'get-r-done'!! I've even managed to make a training arm IRS with them. v/r Andy
  11. [WIP] Grave Digger

    Looks like your're making progress and learning as you go. We patiently await a video of the performance and ruggedness of the design. v/r Andy
  12. After looking at it again, I'm getting a vibe. v/r Andy
  13. What are your thoughts on the wheels? I trying something similar, but working on 4WD. I like the sway bars. Good luck with school, we'll be here when you get back. v/r Andy
  14. I'm sitting in a bar at an airport laughing at your video and getting funny looks. Amazing! v/r Andy