Posted by Janicholson on January 30, 2012 at 20:47:38 from (67.72.98.45):
In Reply to: Slow gears posted by Mike Lumley on January 30, 2012 at 06:01:10:
At the start of your pull you can drag the sled as fast as the tractor will go in that gear minus slippage on the tire. Pretty fast. as the pull continues, more load slows the tractor until it reaches a point that it has little forward motion, and the tires spin. If you lower the ratio to reduce speed, the sled will be moving slower all through the pull. Because of this you will go a shorter distance. The inertia you generate on getting to speed is now less. I believe a taller set of rears (not wider, just taller) will be better (you have no power issue, so putting taller tires on it will allow you to move the lead faster in the first part of the pull, and allow more of the grunt of the engine to work with less spin. When getting near the end of the traction throttling back to keep from spinning out will gain a few feet. the faster initial speed will gain maybe 10 feet. I would go the bigger tire route first, then if no better, go to hand made gears. Jim
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