[Land-speed] Valve springs - Or Lack Of Valve Springs>From>Jim McNaul

jgmagoo at comcast.net jgmagoo at comcast.net
Sun Sep 2 11:58:31 MDT 2007


Last I heard from the highly secretive world of Formula One, was that they were using multiple poppet valves (like 5-per cylinder), opened by a camshaft but closed by compressed air pressure instead of valve springs.

They say cooling metalic valve springs at 19,000 RPM is an insurmountable problem.

Thats about 158 valve cycles per second! And they race for over an hour!

Eeee-yowwww!

JG


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