Originally Posted by
NickRally
Also during the jump, Breen’s engine rpm first went significantly up, then he lifted which brought them down, which means engine inertia reaction moments will try to roll the car (people with knowledge can comment which way the crankshaft rotates to enable us resolve which way the car should roll when rpm goes up and down).
Having said all that, any mechanically/driver induced rolling nose up motion will then result in the flat-ish floor of the car turning into massive lift generating device leading to even more nose up attitude. Of course it is also possible to argue that aero imbalance prior to the jump causes a small nose up roll, which then results in further roll when the car is in the air, but I am of the believe that such aero imbalance will be heavily felt by the driver handling-wise, while also in Citroen’s case, taking into account their issues of nervous rear, I reckon it is very unlikely they have hugely more rear than front downforce, especially considering the flappy diffuser strakes, which probably render the rear diffuser useless. And the other thing is that watching the on-boards from several cars at this jump, the drivers treated the approach differently, which then affects the behaviour in the air significantly.
Thanks to anybody that had the patience to read this and apologies for any typos as I haven’t got much time to check it properly :).