CSRV valvetrain better than Pneumatic Poppets?

[Conceptual]

http://www.coatesengine.com/csrv.html

Posted this link in a different thread that wasnt on the topic, so i thought I'd start a new thread for it.

Why the heck arent these used in modern F1 engines? Other than the tech regs keeping them in 1860's technological era...

Any thoughts on this?

Chris

[Carlos]

Yes Chris, there are a few thoughts concerning rotary valves and several other methods of opening intake ports, sleeve valves but I had recommended, you look through the index, engine, aero and chassis, to find it. The threads are well worth reading, you could possibly learn a few details and see what technology has already been covered.

There's a thread on this already.

[Conceptual]

I'll start abusing the search function before i post any "new" questions.

Thanks!

Chris

[riff_raff]

Why the heck arent these used in modern F1 engines? Other than the tech regs keeping them in 1860's technological era...
Chris

As you noted, rotary valves are not permitted in F1.

As for the Coates design in particular, if you study it carefully, you'll find that it has higher friction losses and a lower flow coefficient (ie. port time-area) than a well designed conventional four-valve head of similar dimensions. Also, the combustion chamber shape that results from his rotary valve arrangement is nowhere near as efficient as a conventional four-valve, pent roof, center plug design.

Coates makes a lot of unrealistic claims for his valve design. The reason I know this is that I've studied rotary valves in depth, including his. I have a (expired) patent for a rotary valve design (US patent 5052349) that has much better flow characteristics than the Coates design, as well as a more efficient chamber geometry. However, since Coates had much more money to develop his concept, he has been somewhat successful, and I have not.

[ackzsel]

If I look at it I would say that the rotating valves showed on their web site have a lot of mass compared to a conventional cam shaft, therefore I think it increases the engine's inertia.

Is this right? Or are the benefits great enough to compensate for this.