Losi NASCAR weighted cone system

This system of weighted cones makes parking lot RC car racing way more fun (and efficient), as the cones stay put on the asphalt and minimize the amount of time you spend resetting the cones when one is hit. These were tested extensively with the new Losi NASCAR 1/12 RC cars, but could be used with most any RC car for impromptu parking lot / street racing. They even include a feature to hold these flags for even better visibility.

The cones are these small flexible ones typically used for outdoor sports and the weights are these 2.5lb ones that fit inside. The 3D prints are simply the pieces that hold the flag, cone, and weights together.

I found that two cones stacked on top of each other work better for handling the impact of the RC car and are a bit more rigid together. The black TPU piece, called the ‘weight cone adapter’, goes in through the top of the cones:

Then the weight can be placed on the black TPU piece so that it fits through the hole in the weight:

Then the orange PETG piece, called the ‘weight cone adapter plug’, screws into the black TPU piece. This locks the two pieces together and lets the weight ‘hang’ from the top of the cone. The weight is distributed along the perimeter of the cone, so it really grabs/grips the asphalt.

Since the TPU piece is flexible, it won't break when a car hits the cone directly. The hole for the flag is sized for a friction fit, but you might need to slightly open up the top with an RC body hole reamer depending on your printer/settings.

The black TPU piece can be printed upside-down on the build platform with no supports needed. The orange PETG piece can be printed with the tabs down flat on the build platform, also with no supports needed. Enjoy!