Professional Electronics Engineer with a specialism in EMC.

DefLander

This is inspired by the ToyLander, but is engineered to be four-wheel drive, and usable in HackyRacing/PRS.

The DefLander is based on the looks of a Series 2 Landrover, the dimensions come from the 2019 PRS and 2019 UK Hacky Racer Rules:

Physical design constraints

§ 1.4. Car Size of 2019 PRS Rules for the Terminally Humourless

  • Each car shall not be longer than 62”
  • Each car shall not be wider than 36”
  • Each car, including the driver seated and dressed per the rules, shall not be taller than 72”

§ 1.4 Car Chassis of the UK Rules

  • Each car shall not be longer than 1500mm
  • Each car shall not be wider than 900mm
  • Each car, including the driver seated and dressed per the rules, shall not be taller than 1800mm

§ 1.7 Motor Propulsion, § 1.8. Battery, § 1.13.6. Fuse

  • Each motor must have a maximum RMS input voltage not greater than 48V from the motor controller.
  • Each car shall have at least one battery with a nominal voltage less than or equal to 48V that supplies traction current to the controller and motor
  • 48V = 30A (10S – 12S Lipo)
    • Digikey #F7139-ND BF1 series
  • 36V = 40A (8S – 9S Lipo)
    • Digikey #F3089-ND MIDI series
    • Digikey #F6792-ND BF1 series

§ 1.13.3. Brakes

  • Brakes are required safety systems.
  • Each car shall have mechanical brakes capable of stopping the car in full per Rule 4.1.1.2 (At the end of the hot lap, your car will have to come to a complete stop within 6m of when its transponder crossed the start/finish line.)
  • Brakes that apply braking force directly to the tyre of a car are not allowed to be the only source of mechanical braking.
  • Brakes that apply braking force to the ground are not allowed.

Other constraints

  • Bob’s big CNC machine has a 4′ x 4′ (1200 x 1200 mm) cutting bed.
  • Bob’s small CNC machine has a 300 x 300 mm cutting bed.

https://github.com/PhilipMcGaw/DefLander