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Snowcat Restoration & Modification Projects Forum Major Restorations, Upgrades, and Non-Stock Snowcat Modifications

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  #1  
Old 01-24-2018, 01:57 AM
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Default Convertible freight trailer on skis project-Help

After many hours of looking for the right freight hauling setup, I gave up and went to the drawing board.. We use our cat for cabin access, and are going to be needing it for hauling building materials as well, in order to extend the building season.

Needed something lite, tough, large enough to really haul, yet small enough to get on the ramp trailer with the Imp. Also wanted it for potentially hauling friends, dogs, friend's dogs, kids, grand kids, snowblowers, broken snowmobiles, running snowmobiles, etc. etc.

After more thought, need it for hauling fuel oil, so a transfer tank is in the plan, and also need it after the snow is gone, so trailer axle and wheels is also in the mix.

Below is a sketch of what I came up with, and progress pics. (Can't seem to figure out how to put photos within my text??)

Now that I am underway (Too far to turn around), I have a concern. The skis are approx. 10"x 66", so fairly large. My worry is the large surface area (much like a really large tire) and the sideways strain of turning it in wet snow. The axle is a 2000# (1 3/4"). I guess it is similar to a Tucker pontoon being mounted to a straight axle, only the bearings are not the size of a Tucker. 1320 Sq. In. of float and only 300# of constructed weight means only .22 PSI, and with freight, say .66 PSI on a heavy day, so pretty good flotation.

The question now is do I have a problem? Thought of maybe running a diagonal arm from the ski tip to the center of the axle, so sharing the same pivot point. Can't think of another way since the ski is mounted to the axle hub, and needs to be able to pivot at that point.

The overall width is well within the tracks of my wide track Imp. The skis will be skinned with 1/2" UHMW, so really slick. The deck is all aluminum Perf-O-Grip, so really light.

What you engineers think? Thanks for looking
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  #2  
Old 01-24-2018, 09:25 AM
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Default Re: Convertible freight trailer on skis project-Help

I have rented a ski trailer several times. It was built extra strong and may not be far from your home.
See my wood haul posted pictures.
Jim
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Old 01-24-2018, 12:32 PM
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Default Re: Convertible freight trailer on skis project-Help

That's shaping up to be one stout trailer!
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Old 01-26-2018, 12:45 PM
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Default Re: Convertible freight trailer on skis project-Help

have you thought about tongue weight, with your axle set back so far.
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Old 01-26-2018, 06:43 PM
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Default Re: Convertible freight trailer on skis project-Help

I'd put some scags running the length of your skis or it's going to want to go sideways on a side hill. I've also noticed when pulling a dead cat with a tow bar they really push hard behind you going down a hill and want to jack-knife more than you would think. Unless you have almost level road be careful with that 1404. A couple loops of chain you can slip over the front of the skis to induce drag when needed might be a good idea.
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Old 01-30-2018, 02:51 PM
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Default Re: Convertible freight trailer on skis project-Help

Thanks for the thoughts/ideas.

Tongue weight-

The axle location does look far back, in compact mode (see drawing), but is at proper 60% when expanded to hauling mode. That being said, I won't be hauling huge loads (weight wise), and I'll need to load appropriately, both for balance and 1404 considerations.

Skegs/Chains-

I have UHMW for the ski bases, and was mounting UHMW ribs for skegs for side slip prevention, and to serve as a wear strip for inevitable asphault, etc. I really like the ides for chains underneath to add downhill friction. Wonder what they'll say when I ask for those at Les Schwab?
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Old 01-30-2018, 03:00 PM
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Default Re: Convertible freight trailer on skis project-Help

Quote:
Originally Posted by mikemikelle View Post
Thanks for the thoughts/ideas.

Tongue weight-

The axle location does look far back, in compact mode (see drawing), but is at proper 60% when expanded to hauling mode. That being said, I won't be hauling huge loads (weight wise), and I'll need to load appropriately, both for balance and 1404 considerations.

Skegs/Chains-

I have UHMW for the ski bases, and was mounting UHMW ribs for skegs for side slip prevention, and to serve as a wear strip for inevitable asphault, etc. I really like the ides for chains underneath to add downhill friction. Wonder what they'll say when I ask for those at Les Schwab?
Just go buy two 12" lengths of chain at any hardware store then tack the ends together to form 2 looks of chain. On steel hills, loop a circle of chain over each ski tip and tow away. It works great. Another option that is lighter, quieter and won't scratch stuff is using old snowmobile drive belts. Probably free from any dealer. Same idea and in my opinion, creates even more drag due to the shape of the belt. They are very tough and will not break.
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Old 01-30-2018, 08:47 PM
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Default Re: Convertible freight trailer on skis project-Help

Quote:
Originally Posted by mtncrawler View Post
A couple loops of chain you can slip over the front of the skis to induce drag when needed might be a good idea.
When I've skied out of Salt Lake City, we catch a city bus up one of the canyons. Those buses have chains for the rear duals which they can deploy automatically with the pull of a dash lever. (In that case, the chains are let out from between the duals.)

Perhaps a person could build some chain loop that could be deployed over the front of the skis via an actuator (electric or hydraulic or ?) to work as a brake?
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Old 01-30-2018, 09:11 PM
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Default Re: Convertible freight trailer on skis project-Help

Looking good.

As is common... when ya can't buy what ya want, ya build it.
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Old 02-13-2018, 01:08 AM
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Default Re: Convertible freight trailer on skis project-Help

UHMW skins mounted and bent to the ski frames

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Sacrificial skegs/skags (whatever they're called?) mounted to the bottoms for side slip prevention

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Skis done!!

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Old 02-13-2018, 11:12 AM
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Default Re: Convertible freight trailer on skis project-Help

maybe you can mount the beer kegs on the skiis, that would be kewl !

nice work
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Old 02-13-2018, 04:11 PM
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Default Re: Convertible freight trailer on skis project-Help

We used these chain brakes on ski patrol tobaggans all the time on steel icy slopes. Works awesome and easy to keep out of the way when you don't need them.
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Old 02-14-2018, 12:47 AM
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Default Re: Convertible freight trailer on skis project-Help

For those of you trying to put the brakes on my project (you know who you are!), here ya go....

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Snowmobile belts it is!! Thanks for the great idea

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Made the notch slightly narrower than the belt, and ground a small area of belt for install/removal


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Belt stores nicely between the rails too

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Put one on the back also, to use as a parking brake when unhooking the trailer

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Simple, clean, cheap (free), and non-scratch. If needed I could install some bolts for icy stuff

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Thanks again for the input
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Old 02-14-2018, 01:11 AM
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Default Re: Convertible freight trailer on skis project-Help

Quote:
Originally Posted by mikemikelle View Post
For those of you trying to put the brakes on my project (you know who you are!), here ya go....

Attachment 96151

Snowmobile belts it is!! Thanks for the great idea

Attachment 96152

Made the notch slightly narrower than the belt, and ground a small area of belt for install/removal


Attachment 96153

Belt stores nicely between the rails too

Attachment 96154

Put one on the back also, to use as a parking brake when unhooking the trailer

Attachment 96155

Simple, clean, cheap (free), and non-scratch. If needed I could install some bolts for icy stuff

Attachment 96156

Thanks again for the input
Perfect!
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Old 02-14-2018, 10:32 AM
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Default Re: Convertible freight trailer on skis project-Help

hanging up or hitting roots with the ski puts lots of stress on your cat.down the road you may want a spring in the hitch like the military trailers and sleds and solid skis to the frame. i can see the axle being bent or damaged springs if loaned out and overloaded.
i haul firewood every year and post pictures in a 12' ski trailer and felt it shake my pistenbully.

a light trailer like that you may be fine
i don't think anyone is trying to put brakes on your project. remember you asked for help
jim
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Last edited by JimVT; 02-14-2018 at 10:44 AM.
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Old 02-14-2018, 03:53 PM
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Default Re: Convertible freight trailer on skis project-Help

Quote:
i don't think anyone is trying to put brakes on your project. remember you asked for help
All good ideas, Thanks Jim

No complaints here; meant as a pun
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Old 02-19-2018, 03:48 PM
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Default Re: Convertible freight trailer on skis project-Help

Progress, though mother nature is conspiring against me-

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We got 6" of snow, and I didn't see it in the forecast! 2 canopies toasted

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The hitch carrier is one I built for the jeep, but additionally fits the cat or the trailer. Below is a photo of it with the cooler

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The pulling hitch is stowed in the upright position in this pic. A smaller hitch allows it to fit behind the Imp on the ramp trailer.

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