Originally Posted by louis rosenfeld
I beg to differ and wish I could offer an explanation as to why your answer is incorrect but a 10mm change in height over 294mm length is 1.95 degrees., 3mm change over 294 is .6 degress. So at the very least you have 2.55 degress ramp. In actuality the ramp isn't measured over the length of the boot but over the length between the two points on which the boot or foot is suspended.
So in the case of binding ramp it is measured between the AFD and the heel pad. In the case of boot ramp you must remove the zeppa and measure its length. And if the zeppa has toe spring (not completely flat zeppa, but zeppa with reduction of overall angle, usually changing at the ball-of-the-foot you must measure between rearmost portion of zeppa and ball-of-foot.
I realize this seems like nitpicking but changes of only a few mm can make substantial changes in angle over the short distances we are using.
The overall angle you have quoted is the lowest by more than half than I have ever seen as angles of 5 degress and more are typical. See my article in this season's first issue of ski racing.
Thank you for your answer.
Yes you are correct and the overall angle is incorrect.
Boot ramp: i have to measure the height of the toe of the bootboard, the height of the heel and its length. I measured it and this is what i found: toe=9.5mm heel=19.5mm but i can't measure the length b/c i can't take it out anymore (it's a long story). So i can't measure it. Is this how the boot ramp should be measured? I think it is. And reading some posts again, this angle is in fact the delta angle you have been referring to, right? This is what actually confused me (i think). Reading Beta's posts the delta angle is in fact the boot ramp angle. And yes, in a 25.5 the ramp angle/delta increases compared to the same toe and heel height of the bootboard in a 28.
binding ramp: how do you measure it? The standheight of my Marker Comp 14.0 EPS is 19mm (w/o ski). This number is taken from a Marker website. from what i know, the difference in height between the heelpiece and the toepiece is 5mm.
So the delta angle/ramp angle is different from the binding ramp and from the stand height (with or without the ski
). So they are three different things!
Thanks again! I am trying to better understand these things so that i can use them later.