F1, trickle-down, etc.

[Wild Thing]

They use pneumatic valve spings in F1. A metal spring would be to slow. Look at cart engines for instance, they have mandatory metal springs and these limit rpm to around 15000rpm.



> 
> > The valves move so fast that valvesprings are simply to slow
> > to close them (a spring takes time to decompress even without load).
> 
> So out of curiosity, how do they handle this problem?  What's the
> limiting factor for further increasing the max RPM, anyway?


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