Heroin (MW)

WEIGHT: 54kgs
DIMENSIONS: 90 x 75 x 22 cm
SHAPE: Low box with steep wedged front, Surgeon General style rear wheel guards, and shallower wedged rear. The top panel 'steps down' a bit about halfway from the rear of the robot.
COLOUR: Black with silver weapon, white smiley face on top and name written on the rear wedge in white
DRIVE: 2 Yamaha 550cc 12v 1kw motorbike starter motors run from a single Odyssey 12v 14ah battery, driving four urethane rubber tyred external wheels. Two are 230mm diameter and mounted inside the rear wheelguards, while the other two are 115mm and mounted just beneath the front disc. The wheels are driven with different gear reductions so they have the same actual speed.
SPEED: 15mph
GROUND CLEARANCE: 5mm, the rear wedge is 0
ARMOUR: 2mm and 3mm titanium/10% vanadium alloy over a 2014 aluminium frame. Base is 3mm 2014 aluminium.
WEAPONS: Mounted on the lower part of the top panel is a 10kg triangular flywheel, 60cm in diameter (giving about 20cm reach in front of the robot), constructed from 2014 aluminium with Hardox claws at each point and steel weight increasing inserts to create a flywheel effect, powered via belt drive from a McCulloch MCC1453A 35cc chainsaw petrol engine. This spins at a maximum 4000rpm and produces energy somewhere in the 20-30kj region.
The rear wedge also lifts up, powered from a third Yamaha bike starter motor through a 200:1 reduction. This can comfortably lift another middleweight although the lifting part's in the wrong place to self right the robot.
SRIMECH: Invertible; has 4WD when in the correct orientation and 2WD when inverted, and a ball transfer unit in the middle of the flywheel stops it hitting the ground.
NOTES: Internals are shockproofed where practical to mimimise impact from its own weapon and other peoples'.
Many thanks to Andy Jackson for the CAD
STRENGTHS: Powerful weapon, protected at the rear as well with the lifter, good drive, good armour and good traction
WEAKNESSES: "Don't do drugs because if you do drugs you'll go to prison, and drugs are really expensive in prison" - John Hardwick