help me with my new design

[vinman]

I'm working on a new design and I'd like a bit of help with tweaking it some. I've uploaded a snowcad file to my cloud account, you can see it here http://www.cl.ly/6vjB

Pay no attention to the camber profile that will be done in a second file but the profile will be 40 cm early rise tip with 45 mm rise, 4 mm positive camber underfoot and a 30 cm tail with 25mm rise.

Anyway take a look and let me know what you think. I'm designing this for soft days but want it to be quick, floaty, versatile and but be stiff enough to bust crud and cut up pow easily. Core will be maple and poplar, 2.2-11.5-2.2 profile, 22oz glass.

thanks for looking

[Drew]

Id beef up the tip at the front. it might dive cuz its so narrow.

[MontuckyMadman]

Looks cool. I understand what you are doing here. I would suggest less sidecut.
With a ski like this with a long low rocker you want to try and match the rocker to sidecut profile or the ski will be very hooky.
Check out the renegade from 4frnt.
With a super short running length the ski will turn very easily without a short turning radius.
I personally want the option to make long fast turns. With a ski with a 16m sidecut and a super short running length the ski will not do this and the turns will be windshield washery potentially.

nevermind im sure it will be fine.

[vinman]

maybe a bit less wide in the tip maybe 135ish mm with a bit more rise something like 50mm rise.

I'm not sure snowcad does turn radius correctly with the 7 point spline template.

[MontuckyMadman]

The problem with sno cad is you cant really design the ski you want because of the limitations of the program.
The program is just not built to handle the complex geometry of a 5 dim ski.
You want a fat tip with a long taper and a multi spline sidecut. Tough to accomplish in that program.

[Drew]

my fattest model is about 152 at its widest point with a 16m radius. I could ski it every day.

[vinman]

yeah this is why the camber profile is done with a second separate file.

I think I'll cut this template out and see what it look like in solid form

[vinman]

I've been playing with this design some and have settled on a 5 dimension design of 122/138/116/123/110

it will have 7cm of rise on a 40cm tip and 4 cm rise on a 35 cm tail with 3 mm of positive camber under foot. Length is 185cm, running length is 110 cm.

I'm shooting for something like the Rossi S7 with slightly less width and a much less dramatic tail but keeps its ability to be versatile, floaty and playful.

Thanks for the help. I'll post something in my WhiteRoom tread once I get into this build a bit more.

Off to the printer tomorrow and maybe cut a template if I can get to it.

[SHIF]

What confuses me about these five-dimension skis, like yours and Armada and others; Where are the first and last dimension measured, how far in from the tip and tail?

What's the point of the first and last numbers anyway? Is this to describe a little reverse sidecut?

-S

[Dr. Delam]

I completely agree on the 5 dimension measurements. The 1st and 5th numbers only really mean anything to the person who designed it unless more references are revealed.

[vinman]

Yeah I think they really just tell you how much reverse sidecut there is in the tip/ tail.

For me those first and last dimensions are at the traditional points for the shovel and tail. To some extent they might influence the shape of your tip/tail spacers and if your 2nd and 4TH dimensions are huge they might influence how hooky a ski might be if measurements 1 and 5 are very narrow.

Although skis like the s7 seem to have huge amounts of taper.