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Need to edit lol, alot of this was copy-pasted from Chonkii Members:

  • Dylan Adriano (Bot Lead)
  • Brian Naing
  • Cade Tyler
  • Jackson Isenberg
  • Lucas Luwa

Drive System

Foot Profile

Weapon System

Design Considerations

Shell Design

Shell was milled out of a 250 lb block of A36 steel. It took forever but was very effective in absorbing damage.



  • Expensive, had to get Speed Machine to have them use a larger machine to mill the shell out.
  • One piece, parts that got damaged on shell were not replaceable - dents needed to be pressed or hammered out.

Weapon Shaft Interface

A tapered roller bearing fits into a housing that is attached to the top of the shell.

Bearing Section View.PNG

Weapon-Drive Mechanism

    • Inspired by Hyperpolarized, it was later decided to drive the weapon by using a single driven wheel at the top of the bot, with rollers along the surface to give additional support. A central shaft was used as a dead axle support.

Chassis System


  • The chassis mostly consisted of aluminum, featuring of a ¼” top and side plates and ⅛” bottom plate.
  • The front and back plates were made of HDPE, which bent to form Chonkii’s robustly round shape.
  • The chassis had multiple rollers spaced out along its top, giving additional support to the shell track above.
  • The central dead axle was constrained by two blocks, mounted to both the top and bottom plates. However, it was later determined that a single longer block with a key would constrain the shaft better than the two block system.
    • While drilling through the blocks into the shaft, a drill bit melted inside, acting as a makeshift pin (that was instantly destroyed in competition).


Drive Motors Turnigy Aerodrive SK3 - 5055-280KV Brushless Outrunner Motor

Drive Motor Controllers Flipsky Dual FSESC6.6 Based upon VESC6 with Aluminum Heatsink Mini Size (whatever apachi used)
Weapon Motor Scorpion SII-4035-250KV
Weapon Motor Controllers Tribunus 06-120A (6S) Brushless ESC
Receiver Hobby King 2.4Ghz Receiver 6Ch V2
Remote Control Hobby King 2.4Ghz 6Ch Tx and Rx V2
Battery Turnigy Heavy Duty 5000mAh 6S 60C LiPo Pack w/XT90
Turnigy Graphene Panther 3000mAh 3S 75C Battery Pack w/XT90


Motorama 2022

  • Results: 2-2
    • Bracket Style: Double Elimination
      • [Chonkii (winner) V.S. Marathon (loser): YouTube Link]
        • This match saw Chonkii head to head with a
        • Chonkii got a bunch of good hits in, sparks flew multiple times.
        • Shove, wall , stay
        • More Description
      • [Chonkii (loser) V.S. Yahoo (winner): YouTube Link]
        • turtle
        • More Description
      • [Chonkii (winner) V.S. Pigeon (loser): YouTube Link]
        • Trick shots, smacked off titanium front plate
        • More Description
      • [Chonkii (loser) V.S. Lockout (winner): YouTube Link]
        • Forfeit (5 thou)
        • More Description
    • Robojacket Rumble
      • [Chonkii vs Everyone: YouTube Link]
        • Description
        • More Description


  • Stuff
  • Other Stuff

Changes to make

  • Stuff
  • Other Stuff


  • The Vectrax was rendered inoperable twice by Chonki members (mainly Brian) during its construction.