CoP (hereinafter — Centre of Pressure) displayed in the garage without driver is 59.1% rear, but shifts to 57.8% with driver in. To fix the ‘specs display error’ I need to add an ‘aero centre’ subobject, which is easy, just won’t publish a new version for such minor changes.
But the main thing is that on track CoP is 57.8% rear.
Now let's dive into what I found about longitudinal CoP
printout of tunnel 3/10 scale model run results (used as an illustration on page 74 of ‘Driving Ambition’)
Wheelbase : 32.2in = (roughly) 2718mm * 1/25.4mm * 3/10
Centre of pressure = -17.50in to rear of Datum (Datum is Front Wheel)
So, it’s 54.3% rear for ‘Run No : 214’, but Gordon says there were around 1000 wind tunnel tests and it seems like the early models had a longer nose.
printout ‘Chassis/Suspension design targets’ (used as an illustration on page 127 of ‘Driving Ambition’)
Perhaps the best solution nowadays is to check CoP using OpenFoam, but first need to finish refining the model's roof and pillar areas. However, won't happen soon because I want to complete '2017 Yellowbird' first.
I do appreciate your handling improvement suggestion overall, just IMO it will make URC1 less like McLaren F1. Anyway, please feel free to raise any objections — I’d be happy to discuss.
BTW, I noticed your top result on the ‘JaR’ hotlap system; glad to see you guys challenging URC1.