<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body bgcolor="#ffffff" text="#000000"> <blockquote> </blockquote> Grin... ok... no begging. I just dissagree. Aftertouch in a grand is clearly a different puppy then what is loosely called aftertouch in an upright.  Heck the <<touch>> in the term should be nuf of a kicker to clue one in on that.  "Jack escapement" in both are quite similiar... but aftertouch, (in both cases if one insists on misusing the term in the case of the vertical) is quite a bit more then jack escapement. Which indeed is about the only thing they do have in common. The academies and other resources cited make these distinctions for a reason, and it seems pretty clear to me what thats all about. I find it hard to understand how emphasizing a point the various academies for concert technician work themselves emphasize does them any disservice Paul.  But no matter. Well wishes accepted and doubly returned friend Revenko ! Its perfectly ok to differ me thinks :) Cheers Richard Brekne <blockquote>  Quit begging! Just differ. The technical definition of aftertouch as the "distance the jack travels after escapement" (grands) or "the distance the jack has traveled" (uprights) is as easily applied and regulated for in both grands and uprights.? They are both the "after escapement" portion of key travel. The analogs between grand and vertical escapement/aftertouch (distance) are plain and useful whatever academy you're citing. The physical analog between the knuckle and hammer butt are clear, and the differences are, too. So too the family of regulations for them, although with different preferred emphases and order--key height, key travel, blow distance, and let-off. Other fine differences can be made with other regulations. Both the similarities and differences are useful tools to have. Too much emphasis on the differences to the exclusion of the similarities does a disservice to the Academy as a whole. Wishing you well! Paul</blockquote> </body> </html>