Strawberry HS course

Race 1 & 2 (October 17, 2015)

A quick explanation of the Data Display. The data is collected by an AIM Evo4 unit. the data is then added to the video using RaceRenderer 3 software. Upper left is a track map drawn from GPS data. Next to it is the 'GForce' sensor display. When the moving dot reaches the edge of the first circle, I am under one 'G' load. In other words, I am being pulled as hard sideways as gravity is pulling me down. This data is from an internal accelerometer. The next display is the speedometer. The speeds are calculated from the GPS. The lap times and lap number are calculated by GPS and not from the official transponder. The latest lap time holds for ten seconds after the end of the lap to make it easy to read.

The two vertical bar displays at the bottom of the screen display energy (rather than power). The right display shows how much energy in Watt hours is being pulled from the battery pack. The left display shows the Watt hours that are being used to overcome motor inefficiencies, rolling resistance, aero drag. This is calculated by taking the previvious kinetic energy (calculated from speed and vehicle weight) plus energy in from the battery and subtracting the kinetic energy now (calculated from speed and vehicle weight). The difference is the energy used up and not being added to the kinetic energy of the vehicle.

Race 1. First six laps with data display.

Race 2. 31 laps before rear tire blows while leading. Abrasive track surface and lots of rear wheel regenerative braking wore the tire through after 132 laps. Look for a moment around lap ten when the steering fails on the car directly in front of me.



USF Feb 14, 2015
Middleton Nov 14, 2015


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