When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Someone on FB asked about knowing where on track when looking at a Friction Circle XY Graph. I put together this quick profile using RS3A beta to show how the point in the XY plot matches a point on the track. You can color the XY plot with any measure you want (I used Gsum) and color the track map with a channel (Gsum again). A powerful feature of the layout is to then put a measures graph underneath with speed, throttle position, brake, and steering to see how the driver inputs all combine to build G forces and create the GSum Graph. The histogram bottom left is a great way to see where most of the G forces are distributed.
RS3A provides a great way to look at the friction circle while showing the track position.
For those that are really into data, you'll know that the coloring of Gsum XY plot is really just the distance from the center. You can color that graph with something like brake pressure, throttle position, etc. to see even more info. The graph below is zoomed into turn 1 and the Friction Circle Graph is now colored by brake pressure.
Zoomed into T1, you can see the Friction Circle colored for brake pressure with all the drive inputs in the Measures Graph at the bottom.
I like colorized charts and a track map to cross reference as well for looking at the G/G plot. This is a sheet I've been using with similar ideas.
There are a couple of John Block inspired things in here -- the "stress" chart lets me find the places on the track where I'm doing something abrupt with steering which usually means it needs a look-see (<cough>T3</cough>). I really like using Long-G and Combined-G overlaid together on a time/distance graph -- it's taken me quite a while to teach myself to get the rise in long G to lead to sustained (i.e. horizontal-ish) Combined-G indicating that I'm doing better at blending out of brake and into steering load (South Bend and Oak Tree look that way on this lap although I suspect the whole thing can move up a bit...combined G sustained could be higher). I've heard it said that if you see the combined trace dip after it reaches the sustained potential for the car then you have just found a "valley of opportunity" dip in the trace meaning that's a place you are under-using the available grip (T13/14 is a bit that way in this lap; braked a bit early I think so that's the opportunity).
The speed weighted oversteer is right out of Buddy Fey's book in case anyone is wondering -- yes, inducing more rotation (so more red-ish tones showing oversteer) is something I'm working on ).
Depending on what question I want to think about I start with the overall view and then dive in. In i2pro you click a chart on the page and F6 to maximize and you can see more detail (practically essential when at the track on a smaller screen ).
Big +1 for your point about highlighting a corner or section at a time too -- that really helps
SO glad AiM finally allows additional channel values as a color blend in X-Y plots. That’s a very powerful feature and visualization. Been in i2 Standard for a long time.
__________________ -Peter Krause www.peterkrause.net www.gofasternow.com
"Combining the Art and Science of Driving Fast!"
Specializing in Professional, Private Driver Performance Evaluation and Optimization
Consultation Available Remotely and at VIRginia International Raceway
10-12-2021, 09:51 PM
GSum Views
).
