Rotary Racer Car Data

Rotary Racer - Car Performance

Castle Combe 2012-09-300

Results

Another dry race, although relatively cold and windy.

Although we could have just used two drivers, the drivers choose to use all 6 drivers and we won, just ...

Car Computer Log

This shows the main items measured by the Rotary Racers car computer. They are:

Item Description
Throttle The position of the twist grip throttle from 0 to 100%
MotorCtl The motor power output setting. The Car computer sets the motor power based on the drivers throttle position, the speed of the car and the current being used. There is a software algorithm to implement this "drive by wire" system. The Car computer drives the PWM (Pulse Width Modulation) Motor Speed controller with a duty cycle proportional to this value. 0 - 100%
Speed The speed of the car in Km/H calculated from the magnetic read switch pulse generator by the Car Computer.
Voltage The batteries voltage under load.
Current The current being taken from the batteries.
Charge0 The charge left in the battery pack 0. This is calculated by the car computer using an algorithm that has been honed to match the battery discharge curves for the Yuasa batteries. It currently bases its results on the current being used from the battery.
Charge1 The charge left in the battery pack 1. This is calculated by the car computer using an algorithm that has been honed to match the battery discharge curves for the Yuasa batteries. It currently bases its results on the current being used from the battery.
Charge2 The charge left in the battery pack 2. This is calculated by the car computer using an algorithm that has been honed to match the battery discharge curves for the Yuasa batteries. It currently bases its results on the current being used from the battery.
BatPack The battery pack in use (0, 1 or 2), the turbo button (4) and the Pitstop warning (8) . We generally change the battery pack with each driver change.
Temp The Temperature of the motors casing in degrees C.
GPS GPS position, speed and time together with lap position information
Misc Other items describing the operation of the control system


The graphs show the overall data, the actual ASCII data log files are also available, from the links below, for detailed analysis.

F24+

F24+ data

F24

Car Data Log

Practice Laps Data

Car Data

Notes

  • The Car was RR8h. This was the cars twentieth race.
  • We used a 18:49 gear ratio as we did last year although it was much more windy.
  • Drivers were: Dawn Barnaby, Jacab , Steph Dando, Micheal, Louise and Tom Allington. The drivers drove excellently, went fast and kept out of trouble.
  • The motors temperature kept below 35 degrees, it was a cold day.
  • An excellent race and an excellent 1st place result.