Chassis & Body
Each car should have a theme that’s whacky and entertaining. The crazier the better! You score points for entertainment value as well as speed, so go all out and come up with something completely mad. Bodywork is highly recommended, but not mandatory as long as the car has a strong theme and meets the rules.
Chassis
Wood
The chassis for CYBR TRK was constructed from wood, mostly decking frame offcuts, utilising recycled hoverboard components wherever possible. The front wheels are able to articulate using a hoverboard casting as a joint, in a crude suspension to keep 4 wheels on the ground.
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Aluminium / Bolted (no welder)
The chassis for CYBR TRK was later upgraded to an aluminium box section construction, made from scrap parts of a shelving unit. Given the additional weight of all the bolts required, it didn't end up noticeably lighter!
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Steel / Welded
This is the conventional approach taken for most builds. It can be strong, simple, and still fairly lightweight.
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Body
Wood
The body for CYBR TRK is constructed from a lightweight wooden frame, panelled with thin plywood. This is removable from the chassis to enable maintenance and transport. It was designed in CAD, cut with a mitre saw and table saw then assembled with glue, nailgun and screws. Panels were cut using a circular saw and jigsaw from a plotted template, and attached using with glue, nailgun and screws. Some nails have started to back out after a season of racing, which is not ideal from a puncture point of view.
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Bumpers
The rules state: "Each bumper must cover at least 75mm of height within the vertical space of 100-150mm from the ground" Refer to the rules for all other requirements. See diagram [right] for examples.
Bumper heights will be measured during tech check, with the driver in the vehicle.
The purpose of this rule is to minimise the chance of one vehicle riding above/below another in the event of accidental collision.
For trikes, we've typically allowed the 90% width requirement to mean the width at that end of the vehicle, rather than the full widest point. Otherwise a sticking out bumper on the 'thin' end can actually cause more issues than it solves.
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