Re: Tractor Pictures

Posted by showcrop on April 02, 2017 at 18:43:55 from (73.238.20.26):

In Reply to: Tractor Pictures posted by John in La on April 02, 2017 at 07:41:48:

Speed limits are to supposedly level the playing field amongst the pullers kind of like Nascar restrictor plates. The winner of any tractor pull is the one who is best able to get his power to the ground, so it is all about the traction. But traction is not quite that simple. Traction is mainly derived from the weight on the drive tires and by how good your tires are for the particular track surface. Many pullers carry multiple tires in order to have the right ones. All tractors are weighed in and divided into classes by weight, so that no one has any weight advantage. The next component of traction is the downward pull, or draft from the transfer sled. this is quite well equalized by measuring every entrants hitch height. The next component of traction is the big one. MOMENTUM. If you can get enough of it you don't have to rely anywhere near as much on how much bite your tires are getting. So if you have enough power to be able to run waaaay down the track at 22 miles an hour in road gear and still end up spinning out, while nobody else has enough power to go over 12 miles an hour in seventh gear, well then you see the more powerfull tractor will win every time. So they came up with speed limits to, as they say, level the playing field. And it will to a degree because without the momentum the powerful tractor will likely overpower his traction. Before we started using speed limits in New England I was a great proponent because I was sure that it would level the field. Way back then most tracks were fairly soft and a higher powered tractor didn't have much advantage in traction. However, over the years since then, tracks have had clay put down over the old track, so that now those "stock" tractors that have say 40% over stock horsepower, can get their power to the ground, because they can get their needed traction in the harder surface. So to summarize: for the high powered guys speed limits level the playing field but for the guys that are stock or very nearly, well not so much. So you see the real enthusiasts will always tell you that speed limits do work, because for the most part the real enthusiasts are the ones willing to spend the money.

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