Telemetry chart - McLaren Spa 2012

[bhall]

I don't get it. Do you mean that the telemetry was a comparision of previous laps, and after looking at it Lewis overdrove to compensate and made things worse ? Please enlighten me as to what you really meant there as I'm curious to know.

I don't think Hamilton gave away any state secrets by posting that telemetry. But, every team on the grid is monitoring each other very, very closely, both visually and with audio, which is largely guesswork. Hamilton's gift just made that guesswork a whole lot easier.

That he clearly messed up his own lap makes the telemetry post all the more confusing to me.

[raymondu999]

Now I sort of see where you're coming from. At the very least I'd think it would be illuminating for the teams running Ferrari/Renault engines - they now have a reference of validation for their sonic analysis. (eg. Frequency X Hz is Y RPM) That would indeed be quite good I imagine.

And based on the portions of the data which are performed on full throttle, they have something to work on to reverse calculate (albeit the picture is somewhat tarnished by drag) the torque/power curves. This one probably isn't perfect though.

[bhall]

[...]

And based on the portions of the data which are performed on full throttle, they have something to work on to reverse calculate (albeit the picture is somewhat tarnished by drag) the torque/power curves. This one probably isn't perfect though.

That picture would've been much more tarnished if Button and Hamilton had been running the same setup. But, since they were quite obviously not, I imagine this telemetry made triangulating McLaren's performance a fair bit easier for other teams.

[raymondu999]

At the very least they're probably able to triangulate the L/D of the two cars in Spa-spec now.

[Jersey Tom]

At the very least they're probably able to triangulate the L/D of the two cars in Spa-spec now.

Eh. Even if they could do that - why bother? Would it be worth the time and effort to screw around with it? I'd argue probably not. Wouldn't be high on my radar.

[Cold Fussion]

What I don't understand though, is looking at the time delta in the telemetry, it doesn't seem to really match what we see in the video. The delta clearly shows that Lewis is almost level before the final straight, but in the video it only looks like he is getting further and further away. Even just looking at La source, the telemetry shows the delta as being approximately 0, yet the video shows that Button is clearly ahead. It almost looks like the video hasn't be synced correctly.

[timbo]

What I don't understand though, is looking at the time delta in the telemetry, it doesn't seem to really match what we see in the video. The delta clearly shows that Lewis is almost level before the final straight, but in the video it only looks like he is getting further and further away. Even just looking at La source, the telemetry shows the delta as being approximately 0, yet the video shows that Button is clearly ahead. It almost looks like the video hasn't be synced correctly.

It can be that the trace is not a delta, but delta(delta) or the rate of change for delta.

[Cold Fussion]

What I don't understand though, is looking at the time delta in the telemetry, it doesn't seem to really match what we see in the video. The delta clearly shows that Lewis is almost level before the final straight, but in the video it only looks like he is getting further and further away. Even just looking at La source, the telemetry shows the delta as being approximately 0, yet the video shows that Button is clearly ahead. It almost looks like the video hasn't be synced correctly.

It can be that the trace is not a delta, but delta(delta) or the rate of change for delta.

That would make sense, and it correlates to the video as well.

[Jersey Tom]

What I don't understand though, is looking at the time delta in the telemetry, it doesn't seem to really match what we see in the video. The delta clearly shows that Lewis is almost level before the final straight, but in the video it only looks like he is getting further and further away. Even just looking at La source, the telemetry shows the delta as being approximately 0, yet the video shows that Button is clearly ahead. It almost looks like the video hasn't be synced correctly.

You're making the assumption that it's the same lap between data and video. It isn't. DAQ comparison is two laps of almost identical lap time between the two configuration. Nothing on the DAQ printout there says which laps they are from each driver.

[timbo]

You're making the assumption that it's the same lap between data and video. It isn't.

If it isn't, than it would make no sense for Lewis to post it.

[Jersey Tom]

You're making the assumption that it's the same lap between data and video. It isn't.

If it isn't, than it would make no sense for Lewis to post it.

Lewis just posted a data comparison. Did he explicitly say "here are our best laps from Q3 overlaid" ? Or was that assumed?

In either event, drivers aren't data engineers.

[raymondu999]

I suspect it's not actually - as beelsebob pointed out before, the time delta line doesn't end at -.821s.

Perhaps it's an overlay of HIS own laps from practice? But then - that raises the question... YTF did he choose the high downforce spec!?

[timbo]

I suspect it's not actually - as beelsebob pointed out before, the time delta line doesn't end at -.821s.

As I suggested it might not be time delta, but rather a rate of change for delta.

[Shrieker]

@raymondu999

Rain, tyres, not being comfortable enough in the twisties, who knows. FP3 wasn't a perfect dry session so maybe he mistook it as the car not having enough df with the low df setup, when in fact the conditions were not perfect for an accurate assesment. That may have caused him to think the low df setup wasn't going to cut it in the corners when in fact it could do just as well as he high df one. He made the mistake, paid the price for it, it'll probably end up as the mistake which cost him the title a la Monza 2010.

[Jersey Tom]

I suspect it's not actually - as beelsebob pointed out before, the time delta line doesn't end at -.821s.

As I suggested it might not be time delta, but rather a rate of change for delta.

Look at the speed traces. It's time delta.