Posted by Chuck(G) on February 24, 2003 at 14:13:51:
In Reply to: Re: Re: Re: A question of physics posted by Chuck(G) on February 24, 2003 at 14:10:12:
...and I suppose one could revise the rotary actuation system to include some sort of escapement, so that valve rotation was unidirectional, which would equalize the wear on surfaces. But again, why bother?
Back in the 50's, there was an attempt to re-engineer harpsichord jack action, eliminating the "slop" in the jack guides. What was discovered was that the "slop" is what makes a jack really work--without it, you need some sort of escapement to prevent the quill from plucking on the way back down. The old guys had it right, it turns out.