<html><div style='background-color:'><P>Hi! I posted this about twelve hours ago. Was it missed in the hurry, or deemed erraneous/ too incomplete? So many references since about how much increased friction actually affects the spring. I post it again then, and please ignore if the whole calculation is way out!:-)</P> <P>"An attempt at mathematics...</P> <DIV class=RTE> <P>If the distance hammer to knuckle is 114mmm, and knuckle to flange pin is 16mm, then 114/16=7.125. If hammer weighs 5gr it should weigh 5X7.125=35.625gr at knuckle.<BR>Distance of contact point of knuckle on lever to lever pin is 40mm, and spring contact point to lever point is 30mm, then ratio is 40/30=1.33. By spring contact point the hammer should then weigh 35.625X1.33=47.38gr. Distance of lever drop pad to lever pin is 60mm, and spring contact to lever pin is 30mm, then 60/30=2. So 8gr at drop pad would be 16gr for the spring to carry.</P> <P>Conclusion is that if friction is zero at lever pin, the spring needs appr 50gr to lift hammer, and for a measured 8gr friction at drop pad, the spring needs 47.38+16=63.38, appr 66gr to lift hammer. A difference of 16gr.</P> <P>I don't know what the hammer weighs, and some other friction and weight figures are of course omitted, and someone more clever should correct any mistakes above! Is it otherwise on target?<BR><BR>Danilo"</P></DIV> <P><BR> </P></div><br clear=all><hr>Släng inte bort din tid! <a href="http://g.msn.com/8HMASVSE/2740??PS=47575" target="_top">Satsa på ny karriär</a> </html>