Five hard stops
Emergency braking is a drill with a number at the end of it: how quickly the bike stops. On September 29, Rich rode five hard stops from 21 to 27 mph, and two sensors measured them.
GPS gave the speed. A phone's GPS position wanders too much to measure a parking-lot drill, but its speed is good to a fraction of a mile per hour. That gave the entry speed for every stop.
A camera fixed to the frame gave the deceleration. Its own motion sensor recorded how hard the bike slowed, a thousand times a second.
The brakes came on hard and fast: 80% of peak deceleration within 0.2 to 0.3 seconds, every time. Peaks reached 0.73 to 0.82 g. The last few miles per hour came off gently, so the average over a whole stop was only about half the peak.
For comparison, eleven ordinary traffic stops on the road that day peaked at 0.14 to 0.34 g. The gap between an everyday stop and an emergency stop is exactly what the drill trains.
The distances need checking. The analysis puts the stops at 38 to 55 feet. (Rich still complains that he thinks he stopped quicker than that.) He remembers stopping in under three parking spaces, though maybe not on these runs, so the next step is to measure the lot's stall lines and test again against them.
The full write-up: Countersteer, caught on two cameras.