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this is cool. but remeber this was 1926 techology. Amzaing..... Really looking forward to ski, http://www.snowbuzz.co.nz/

Water, Snow, Ice.... seems to be the ideal enviro for this amazing machine. No probs there I'm in Invercargill... I'll take two!

Yes... but it's not called a SNOW Tractor for nothing. The video display just shows that it can cope with a bit of grass.

What an ingenious machine. Perfect for snow and amazing on ice. But i cant see any other uses other than on water. I think the problem for farming, as i see it as a farmer, would be too much traction. The friction generated by those drum screw things, which enables the amazing grip on smooth surfaces would rip the drums apart on dry land or cause so much damage to the soil that it would counter any benefit in traction.

Gravel isn't too good for tyres either if you're driving on it all the time, but this is primarily a snowy creature, so horses for courses... these should be everywhere from Queenstown to Helsinki! But.... they're not. Hmmmm. CONSPIRACY!

graeme

Hmm, I disagree also with Chopsue, they are actually rolling across the ground due to the rotation, the film clearly shows little of the drag you speak of. One of the issues would be stress on the chassis due to forces twisting the frame downwards against the long axis. It seems pretty effective to me. Limits would really just be the surface. I guess it would be fine on sand, snow, and water, and possibly long grass, but I suspect it would stop dead on anything else. Ford clearly recongised this though, hence his adaptation of his Model T to pop the axles and wheels back on for summer. Well done Graeme!

I imagine this would not be very efficient as the surface of the drum is constantly moving across the ground leading to a lot of friction. Maybe not a problem on snow but what about other surfaces? Imagine what the helical ribs would do the our roads!