5. The photo shows one of Bondurant's skid cars. The outriggers are controlled by the instructor from the passenger seat of the vehicle. Operating the hydraulics causes a shift in weight off either the front or rear axle, resulting in understeer or oversteer conditions, respectively. The team was given instructions on how to mitigate those circumstances, lifting off the accelerator or momentarily applying the brakes to shift weight forward to correct an understeer situation or increasing the throttle angle and countersteering to cancel out an oversteer.
6. The team practiced emergency lane change, panic-stop braking, and turning drills in individually assigned Ford Crown Victoria patrol cars.
17 June, 2010
7. Bondurant instructor Les Betchner briefed the team on how to approach an unfamiliar corner on a road using an out-in-out approach. Special emphasis was placed on executing a smooth, efficient posture throughout the turn, maintaining surveillance on the path ahead.
8. Bullock demonstrated the approved technique for downshifting the transmission while braking. The team practiced this on a section of the pad in individually assigned Cadillac CTS-V sedans. Be advised that this is the method to be implemented going forward.
9. Team members regrouped at the Maricopa Oval section of the Bondurant Road Course (See Fig. 1). The team practiced the above technique at consecutively higher speeds.
10. Following a debrief of the day's activities, the team assembled on the pad for autocross drills. The objective was to advance as quickly as possible through a course laid out by the instructors. The fastest time was considered the best; points were deducted for deviating outside the course boundaries or striking a marker.
11. The final exercise was the forward 180-degree turn. Bullock demonstrated the technique:
- Accelerate to full-throttle in a forward direction to attain sufficient velocity and generate momentum to initiate the spin.
- Once target speed is achieved, suddenly and fully depress the parking brake pedal to lock the rear wheels. Be advised: Some vehicles may have differing parking brake control.
- Once the rear wheels have begun to slide, turn the steering wheel sharply past 180 degrees. The rear axle will begin to rotate around the front axle in the direction the steering wheel was turned.
- As the vehicle nears a 180-degree change in direction, release the parking brake and roll into the throttle countersteer as needed to stay on the newly desired trajectory.
12. Following a debrief of the day's activities, the team assembled on the pad for autocross drills. The objective was to advance as quickly as possible through a course laid out by the instructors. The fastest time was considered the best; points were deducted for deviating outside the course boundaries or striking a marker.
13. Upon completion of the autocross, the team engaged with a lengthy track session in assigned Cadillac CTS-V sedans. Following that, Bullock introduced the principles of the PIT (Pursuit Intervention Technique). Making contact with a suspect's vehicle in a precisely timed and targeted manner, the pursuing vehicle can unload the suspect vehicle's rear axle. The resultant shift in weight opens the suspect vehicle's rear axle to forces from the pursuing vehicle. The pursuing vehicle accelerates while continuing to turn into the path of the suspect vehicle, causing it to spin.