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Old Oct 16, 2007, 10:18 AM
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Jim K.'s Avatar
Chicago, IL
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Large Snow Skis

As you can see from my avatar, I have DuBro snow skis on my 54" EZ.

I surfed around for some larger snow skis for a Rascal 110, and cannot find anything.

Surely there are guys on this forum that have seen snow skis on a large plane, so if you are one of them, please offer your input.

Thanks
Jim
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Old Oct 16, 2007, 11:46 AM
jrb
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Edina, MN, USA
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These are great: http://hometown.aol.com/maidenusammp.../business.html !

Have several pair.
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Old Oct 16, 2007, 01:27 PM
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Have you tried making your own out of foam or super-thin ply? I need some, too, but geeze they are expensive for what they are. I wonder if a kid's toy could be turned into them or something.
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Old Oct 16, 2007, 02:17 PM
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Quote:
Originally Posted by JWilliams2
Have you tried making your own out of foam or super-thin ply? I need some, too, but geeze they are expensive for what they are. I wonder if a kid's toy could be turned into them or something.
I always walk thru the toy department looking for cheap items to cannibalize for this hobby.

And it works sometimes.

DD
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Old Oct 16, 2007, 02:20 PM
jrb
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Foam & lite ply work well for park flyers; but not to good for a 60mph, 110" wingspan model that's over 12#.
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Old Oct 17, 2007, 09:55 AM
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More ideas/links please.

Thanks
Jim
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Old Oct 17, 2007, 11:18 AM
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I think I remember, back in the day, people using pieces of formica to make skis. It may be formable where if you heat it you can curl up the front end. Epoxy on brackets that mount to the axles, and a spring to pull the front of the ski up. In fact, there was an articl on making your own skis in RCM magazine a bunch of years ago that someone may have laying around.
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Old Oct 17, 2007, 09:23 PM
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I guess it wouldn't be all that hard to make a set. It's just that I love the DuBro's, and would like to spend my time building planes, not engineering skis.

I wish DuBro made a bigger version of their black plastic skis.

There has got to be other manufacturers out there that make em.
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Old Oct 17, 2007, 11:35 PM
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I cut some skis out of a scrap piece of 4 mm coroplast. Each ski was cut as a single piece, folded and glued. A piece of thin plywood and balsa was inserted to reinforce the axle area. The first 6 flights on my 60" Great Planes ElectriCub were done with them this January. I attached an elastic band to the front to provide tension against a thin piece of nylon fishing line that was attached to the back. It works, its light, its basically free and probably is available in a variety of colours, whats not to like about that?
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Old Oct 18, 2007, 07:57 AM
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Quote:
Originally Posted by Digiflier
I cut some skis out of a scrap piece of 4 mm coroplast. Each ski was cut as a single piece, folded and glued. A piece of thin plywood and balsa was inserted to reinforce the axle area. The first 6 flights on my 60" Great Planes ElectriCub were done with them this January. I attached an elastic band to the front to provide tension against a thin piece of nylon fishing line that was attached to the back. It works, its light, its basically free and probably is available in a variety of colours, whats not to like about that?
I like it. I came upon a piece of very thin aluminum scrap at a build site (thin enough to cut with scissors), which I think could work well as a base--how well does wood slide on snow? Anyway, what you've done seems like it would work well and I may go that route instead of paying a lot for skiis. The fold at the end though--it seems low--have you had problems with the skiis digging into little mounds of snow?

I wonder if 1/8" ply, if soaked in water for a while, would bend without falling apart and keep its shape into that of a ski...
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Old Oct 18, 2007, 09:47 AM
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Skies-materials,how to build and set-up on plane any size

Here's a link worth looking at.http://www.stenulson.net/rcflight/skikits.htm
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Old Oct 18, 2007, 06:48 PM
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Yes JWilliams2, I didn't put enough up twist to the ski tips. The glue was dry by the time I noticed it. The plane has flipped on an attempted takeoff due to the skis digging into a drift. I built a set out of thinner coroplast for a smaller, parkflyer and had more curve to the ski tips. They had no problem in powdered snow.
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Old Oct 20, 2007, 12:53 PM
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Broomfield, Colorado
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8kasl: nice link, nice ski design. Any rule of thumb for sizing say for a 38" span Cub with 27" prop to back of rudder. Just eyeballing it I would say 1-1.5" wide by 6-7" long?
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Old Nov 22, 2007, 11:55 AM
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My new Rascal 110 is more than 9ft across.

I'm still looking for big enough snow skis.
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Old Nov 22, 2007, 12:02 PM
jrb
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Did you go to the site I linked above?

We use the largest size on our "9ft across" 1/4th scale Cubs!
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