Rotary Racer Car Data

Rotary Racer - Car Performance

Rockingham 2018-07-11

Results


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

Cardata practice

cardata-practice Cardata race 1

Car Data Log

Cardata F24+

Car Data Log

Cardata race 2

Car Data Log


Setup

F24 Race1 gears
16:48
F24 Race1 batteries

F24+ Race gears
F24+ Race batteries
F24 Race2 gears 16:48
F24 Race2 batteries

After race the batteries had the following voltages.
RR13

RR14

RR19

RR20

RR21

RR22

Notes