Thanks Don for that info!
That answers a lot of questions I had on the throat size.
Ron
Yes, but WHY did Dr. Blackburn design it that way?
There were REASONS Blackburn designed them that way.... hint-hint
Steve, Thanks for the input!
I hope everyone keeps coming up with info and we may all get a good history lesson at the same time.
Just for the hell of it, I have to say that regardless of the diaphram and exit(throat) size, design engineering has more to do with the overall end product success than just the size. IMHO
Ron