I've been having a little play with the McLaren telemetry data again, and whilst it's not so hot on the GPS front, we can get an idea of what forces Hamilton experienced as he drove round the circuit (time in the tunnel excepted - it seems to be a telemetry blackspot!)
First of all, a couple of "driver DNA" charts (generated using Gephi) showing gLong ("longitudinal g-force") against the throttle pedal force (rThrottlePedal, first chart) and the brake force (pBrakeF, second chart). In each case, the x axis is distance round the lap (sLap). The gLong force is coloured towards blue for < 0, yellow for 0, towards red for above 0 and the node size is proportional to throttle or brake reading as appropriate.
In the case of the throttle (above), we see that when the throttle is full on, Hamilton experiences a positive lateral force.
In the case of the brake, below, we see a significant negative lateral gForce when the brake is applied (the driver is pushed forwards).
UPDATE: I oops'ed in generating the data file I used to create the above driver DNA charts - I was suppressing data where there was no GPS co-ordinates available. Here are the charts with the missing data included...
First, the throttle:
And the brake:
We can look at this more closely by plotting the lateral and longitudinal forces against the brake and throttle levels.
One of the most noticeable affects is when Hamilton brakes - this is when we get the negative longitudinal "g-force":
Also note that Hamilton doesn't tend to brake hard when actually going round a corner (i.e. when experiencing a lateral "g-force") [plot(gLong~sLap,data=HAMfull_mco_2011,main="F1 2011 Monaco - HAM Telemetry")]:
How about the throttle? One thing that jumps out here is that the throttle isn't applied so much under heavy retardation (as we might expect!) [plot(gLat~pBrakeF,data=HAMfull_mco_2011,main="F1 2011 Monaco - HAM Telemetry")]
Cornering doesn't prevent Hamilton using the throttle though (although we also see there are plenty of occasions when Hamilton lifts off the throttle too...) [plot(gLat~rThrottlePedal,data=HAMfull_mco_2011,main="F1 2011 Monaco - HAM Telemetry")]:
Here's a plot of gLat vs gLong: might different circuits give a different signature? [plot(gLat~gLong,data=HAMfull_mco_2011,main="F1 2011 Monaco - HAM Telemetry")]
And finally, brake versus throttle [plot(pBrakeF~rThrottlePedal,data=HAMfull_mco_2011,main="F1 2011 Monaco - HAM Telemetry")]:
Note how much time is spent on the throttle with no brake, or brake with no throttle, although there are times when throttle and brake are applied. Again, I wonder if different circuits might have slightly different signatures?
So: what do you learn from those charts?
Data is grabbed from the McLaren F1 Live Dashboard during the race and is Copyright (©) McLaren Marketing Ltd 2011 (I think? Or possibly Vodafone McLaren Mercedes F1 2011(?)). Last year, I think that speed, throttle and brake data were sponsored by Vodafone; I'm not sure how it stands this year.
As ever, thanks to @bencc for grabbing the data.