Summary

This is a 150g combat robot (antweight in the UK and Australia, fairyweight in the USA) design I came up with to use as loaner bots for local fights. I've modified the N20/micro-metal gearmotor clamps from Fryddog's bot Rollcage and similar components can be used for the insides, although for weight/space considerations I'd recommend a smaller battery (ie a 180mAh lipo), and a dual channel ESC (such as this one which also comes with the option of onboard mixing if not using a v-tail mixer or a programmable transmitter). As a power light is needed for combat under the SPARC ruleset there is a hole at the back for a 3mm LED.

My Plovers are printed in ABS on a CEL Robox using standard settings, and have held up well even to our more destructive local bots. 8x M3x15mm bolts are used to attach the lid and the motor clamps, with the latter also requiring 4x M3 nuts (the bot in the picture has threaded M3 nylon spacers as I had them to hand).

Update 30/12/19: I've now added the version 2.0 chassis and lid. This now has the lid held on by M3 bolts screwing into ~9mm nylon spacer (like these), avoiding the need to tap the print itself. I now use this method in all my antweights and it works well! It also narrows a little and tidies up the front wedge CAD, and adds changes the back to prevent the chance of getting stuck there.