Much easier to read...a couple questions if you will forgive my ignorance....:) You have pin angles as high as 28 ...degrees ? And the resistance down / up numbers... those are units of what ?... psi or ?? The friction co-efficient is Mikes I guess...and I suppose we will have to except that as beef.. Could you put all this into a formula form to show exactly what pressure is put onto the bridge at the edges on the bridge ? Sounds a bit difficult to do for the rest of the bridge as the farther away from the bridge pins the less affect from them... in an exponential fashion I suppose.. I also note that there is some resistance to the strings moving down the pins... grin.. and I suppose you already know where I would want to take that....Obviously if the bridge swelling can push the strings up the pins, while at the same time not causing a severe enough indentation, while at the same time the resistance from the pins to the strings moving back down as the bridge reverts is high enough to prevent them from doing so without a nudge... then we have a hole in the argumentation :) Ron Nossaman wrote: > Well, that was miserable. Let's try it with tabs. > > St=String Tension > Sa=Stagger Angle > Fc=Friction Coefficient > Pa=Pin Angle > Rd=Resistance Down > Ru=Resistance Up > > St Sa Fc Pa Rd Ru > 160 10 0.52 28 -0.042 26.045 > 160 10 0.52 25 1.6038 25.087 > 160 10 0.52 20 4.3347 23.339 > 160 10 0.52 15 7.0326 21.414 > 160 10 0.52 10 9.6770 19.326 > 160 10 0.52 5 12.247 17.090 > 160 10 0.52 0 14.725 14.725 > > Ron N -- Richard Brekne RPT, N.P.T.F. Bergen, Norway mailto:rbrekne@broadpark.no
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