I'm having trouble wrangling Excel to do what I want but I figured folks might be interested. In roughly an hour's worth of data samples with a few hours of writing the tooling to extract the data from the files and about 20 minutes wrangling the numbers in Excel: There's a bit of "data overload" here so the acceleration part of the chart leaves much to be desired. I'll have to look into filtering the data a bit more. If anybody on the forum has experience massaging such data, I'm listening.
So I had a few bugs in my tooling (that are now fixed) and picked a better (and shorter) sample period.
The speed is from the GPS data file and the accelerometer data is from the 3GF file. It's good to see them sync'd up with each other. 18:37:10 : stop light 18:37:26 : let off (including regen) to let a threatened BMW floor it and get past a lane obstruction 18:38:31 : right turn at stop light 18:39:07 : let off the accelerator to keep a safe distance from the decelerating BMW (and road veers to the right) This data lines up correctly with the video footage (MP4). Interesting sidenote: The deceleration concluding at 18:37:10 was triggered as a "high deceleration event (potentially collision)" (I was surprised the light stayed red). Yes, the Model S has good brakes. - - - Updated - - - Same one as Dr Taras. http://www.teslamotorsclub.com/showthread.php/14877-Al-amp-Ed-s-Dr-Taras-Model-S-gets-customized!?p=328406&viewfull=1#post328406 - - - Updated - - - Peak acceleration in the direction of travel was 42 units (0.328G) and maximum deceleration was 112 units (0.875G). I definitely wasn't hammering the brakes, just moderate pressure coupled with regen. Random data point from the intertubes in March 2005: Braking g's Comparison (edit 6/23/05, 14 additions) [Archive] - AudiWorld Forums