>the 57.29578 and the 0.017453 are then constants ? and these represent what ? * Reduced forms of Arc = (Pi*radius*angle)/180 and Angle = (180*angle)/(pi*radius). Unfortunately, reduction of anything usually obfuscates the relationship of it's parts, even though it simplifies the math. > You couldnt recommend any >good technical reference books (you know my approximate level in these issues) >aside from the one you mention below ? * "The Encyclopedia of Wood" (Sterling Publishing Co,), a 1989 reprint of the 1987 "Wood Handbook: Wood as an Engineering Material" (U.S. Government Printing Office), and "Understanding Wood" (Taunton Press), by R. Bruce Hoadley, are good places to start. Then, there are a number of piano related publications available from supply houses. After that, it's a matter of dumb luck as to whether any single book will have what you may be looking for at any given time, and chances are it won't be just exactly what you need anyway.It seems that most of the knowledge acquired through all the years of research in this field was kept in house, possibly never written down, and certainly never published. What does exist, relating to pianos, is often contradictory. There is no incontestable authoritative source. That's why we have these little discussions in an attempt to boil out the misconceptions. Sometimes, progress is even made. Ron N
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