Ski Flex Prediction...

WhiteCloud · Post by **WhiteCloud** » Sun Dec 13, 2009 4:36 pm

Can you send to bob "at" whitecloudaviation "dot" com

WhiteCloud · Post by **WhiteCloud** » Wed Dec 16, 2009 3:34 pm

I have been playing around with the SS and had some questions. I am unsure of the orange and green plots for deflection and what they are showing. If I change the length of ski, they don't follow with the change, can someone help me understand this. Also, the array of point deflections at the lower right hand side of the SS does not change with the length of ski chosen, what are these used for?

Thanks!

Bob

Thorpster · Post by **Thorpster** » Sat Dec 19, 2009 11:26 pm

Could I get a copy too.

Thorpster · Post by **Thorpster** » Sat Dec 19, 2009 11:27 pm

zcijack at hotmail

DutchDesigns · Post by **DutchDesigns** » Wed Dec 23, 2009 10:23 am

I would like to get a copy of this as well dutchdesigns@hotmail.com

jckeane · Post by **jckeane** » Wed Dec 23, 2009 2:43 pm

I would love a copy of the sheet as well. Jimkeane @ comcast.net

webboy · Post by **webboy** » Thu Jan 14, 2010 5:48 am

http://www.mediafire.com/file/2tymmjzgh ... mmsexe.xls

Hopefully this won't expire...

MontuckyMadman · Post by **MontuckyMadman** » Wed Feb 03, 2010 3:05 pm

webboy wrote:http://www.mediafire.com/file/2tymmjzgh ... mmsexe.xls

Hopefully this won't expire...

expired

MontuckyMadman · Post by **MontuckyMadman** » Wed Feb 03, 2010 3:09 pm

howz bout now?
http://www.mediafire.com/file/w2zhdmuzk ... mmsexe.xls

WSM · Post by **WSM** » Wed Jan 12, 2011 1:58 pm

On the stiffness profile, was wondering what the units used were?

Bambi · Post by **Bambi** » Fri Jan 21, 2011 7:20 am

WhiteCloud wrote:I have been playing around with the SS and had some questions. I am unsure of the orange and green plots for deflection and what they are showing. If I change the length of ski, they don't follow with the change, can someone help me understand this. Also, the array of point deflections at the lower right hand side of the SS does not change with the length of ski chosen, what are these used for?

Thanks!

Bob

It's been a while since I have been around here!

Bob - the green and orange curves are 2 skis (G3 Reverends & Fisher Tstix) that I measured and put on there for reference. The plots should not change! The array of points at the lower RHS are the plots for these skis. You can just delete them if you want but if gave me some confidence that I was in the right ballpark.

WSM - stiffness units... mmmm
Everything is converted to SI so off the top of my head that should be Youngs modulus (N/M^2) multiplied by the second moment of area (M^4) so that would be N M^2 I think.

Apologies for the general lack of user friendliness - I really just hacked it together for myself, but I'm happy to try to answer any specific questions. Perhaps I'll make a slicker version to post.

B.

Buuk · Post by **Buuk** » Thu Jan 27, 2011 2:15 am

I have some Matlab calculations on ski deflection with various loading patterns. If someone is interested then let me know and I will upload it.

Cheers, Buuk

White Thrash Wednesday · Mon Jan 31, 2011 9:49 am

I´m interested!
Please do post the Matlab code. Have you verified it against any skis you´ve built?

Been awhile since I used Matlab...

/Johan

\m/ Matlab. Whiskey. Heavy Metal \m/ ;-)

molekulo · Post by **molekulo** » Wed Feb 16, 2011 1:19 am

Anybody knows, who is author of "Skidimmsexe.xls"? There are questions about some equations used in it.

Richuk · Post by **Richuk** » Wed Feb 16, 2011 2:20 pm

Bambi

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