Those questions are answered in the details of Coates designs on their Website, as much as possible without giving away secrets which are key to protecting many patents. The moment you tell people the details, you make knowledge public, life gets difficult for patents.
The questions in the first article, although good general questions, are primitive and have not properly read through the available tech pages, and current technologies already out there. I'm quite sure the tech has been explained publicly previous to those articles' release.
Valve seating/sealing: Yes, forces are trying to blow more than just a rotating valve off the engine, they are trying to blow the complete head off the engine. This affects any head, not just CSRV. That's why head bolts are designed and torqued in a specific manner to achieve a good seal with the headgasket, cooling passages etc. As far as the seal is created in the CSRV, the seals are on the shaft of the CSRV, between the rotating valves (RV or the ball sections), and by the time the explosive forces are applied to those seals, it is much more of a horizontal direction of force because the seals are on a different plane of axis than the traditional poppets, and the brunt of the explosion was faced by a smooth closed section of the ball of the the rotating valve. For the explosive force to reach the actual seals, it has to squeak along the thinnest passages, between the RV and the head, which greatly dissipates the ability of the explosive force to act on the seal.
The other question was regarding oil-less lubrication, and it was really quite dismissive. It's like they have not explored the applications of ceramic bearings in many other applications. They can work, they do work, ceramics have been utilized successfully in many engine components for decades already too. But current turbo technology (actually several years now) utilizes oil-less ceramic bearing turbo systems, like http://compturbo.com/spotlights/triplex-ceramic.
Kevin's answer was more vague, all he really had to say was that so far it (CSRV taking over Formula 1, and other major market entries) hasn't happened yet. He does not propose any worthwhile critiques, other than citing historical "failures" in other attempts.
So, for Coates to answer these questions would be a waste of time, as they have been answered, and it detracts from getting the job done.
stay long mentioned "Coates should address these issues. Does he have a product or not?" stay long, you mean that if George does not take time to answer redundant questions, it shows he does not have a product? I know you mean well, but sometimes your statements are not thought out well with regards to how they will be perceived.
Coates already has CSRV technology in running form, in China. Most investments/firm orders arrive AFTER demonstrations of CSRV technology. It's not like they are just taking George on a word, wing, and a prayer. Their own technical advisers surely can have some clout! 140 million dollars worth of clout, to be precise?
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