Identical drive tractors and anchor tractor before first demonstration
Firestone drive tractor at demonstration
Drive tractor cable attachment
Explanation of demonstration
Start of first demonstration with spectators
Start of first demonstration with spectators
End of first demonstration with spectators
Switching tires between demonstrations
Overview of first demonstration in progress
Overview of first demonstration in progress
Weighing tractor between demonstrations
End of demonstration
Cable attachment with pulley on the anchor tractor
Firestone drive tractor at demonstration
Drive tractors and anchor tractor during second demonstration
Measuring at end of the second demonstration
Measurement at end of demonstration
Second demonstration in progress
Firestone Engineer Wayne Birkenholz explains results at the end of the demonstration
Cable attached to the drawbar of one demonstration tractor
Observers at end of demonstration
