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Calculating prospective gearing
Calculating prospective gearing

Rotary Racer 9: 2011-2012: Design Ideas

  • Based on RR8, aluminum tube, steel bits, plywood and foam.

  • Need to match 2013 rules. Mainly drivers bottom and batteries bottom less than 100mm from road.

  • Length 3.8m (maybe removable tail to aid transport in vans).

  • Narrow roll-bar and behind roll-bar (by 50mm ?).

  • Reduce cars depth (50mm ?)

  • Reduce cars width (550mm ?)

  • Lower car nearer ground and play with underside and top shape in wind tunnel.

  • Where to put batteries (behind driver either side, front, sides of driver, rear as now) ?

  • Battery placements. Insulated

  • Heat batteries with heat from motor somehow.

  • Use 16inch wheels. Find better rims to easy of tyre replacement. Need to build some using hubs we have (or use RR8's wheels).

  • Move cross bar in front of driver further forward (50mm ?) and curve up in the centre.

  • Thinner computer display shaped for curve or to the side.

  • Move rollbar back 50mm for more driver space.

  • Move lower crossbar in driver area further back (150mm ?)

  • Remove heavy plywood bits.

  • Foam bits as a shell to reduce weight.

  • Rear axle single bar to reduce weight (depends on CoG and where batteries are) or aluminium welded rear subframe ?

  • Aluminium or lighter weight front steering system.

  • Improved electronic power control system. Work on new speed controller.

  • Experiment with overal shape (Wind tunnel tests both VWT and RWT) ?

  • Lighter weight wheel covers ?

  • Target weight 50Kg ?

Misc Ideas