Monday, October 4, 2010


If you haven’t figured it out yet, my current project is a Lego Sentry gun using the new (and might I add really cool) Nerf Stampede machine gun. Last weekend I spent about eight hours building the mobile base for it. I even ordered some needed parts from Bricklink before I knew whether or not it would work. I now know that it doesn’t work the way I currently have it built. I tried to give it enough power by putting two XL PF motors on each track, but that still isn’t enough. It moves fine going straight, but it won’t turn and every so often the track belts break.

I guess that is the price when you build big; your mistakes and rebuilds are big. But it looks really cool, so I thought I would show it off.

Back to the drawing board.


  1. Uber! can't wait for it to be finished!

  2. It looks like there is no grip on the tread at the bottom try using the small idlers that Lego used on the bulldozer they fit the inside of the tread better and help with sideways strains.

  3. Anon, I started out using those, but they looked too small for the large construction. Then I pulled out all my wheels and looked for something closer to the scale.

    Those tires actually fit really well in the tread groove and they have a larger diameter and have rubber tires on them so they glide more when the thing moves. There's no "clickety clack." I can manually pivot the thing around and the wheels stay in the goove quite well.