Posted by Hugh MacKay on May 19, 2009 at 19:31:29 from (209.226.106.83):
In Reply to: Re: Plowing with a H? posted by rustyfarmall on May 19, 2009 at 08:45:32:
Rusty: Pulling a trailer plow is much like pulling a stone boat. When the average IH trailer plow is plowing 8" deep, the pivot point of plow and tongue is roughly 6" off the ground. The hitch end of tongue at tractor drawbar is roughly 15" off the ground. Now, most folks will agree that a 3.5' tongue at that sharp angle will exert considerable down draft on tractor wheels. The further that hitch point is from tractor rear axle, the more down pressure the draft will exert on tractor rear wheels. Believe me, this is how Harry Ferguson and others learned that if you extend that hitch point back even further than the swinging drawbar, it becomes very easy to transfer plow weight and soil to moldboard suction to rear wheels of tractor. Well my friend, good trailer plows also transfer a lot of weight if that swinging drawbar is long enough. Having said that, I doubt if one could keep the front wheels down if the swinging drawbar were rigid enough and extended 4' beyond the U drawbar, you couldn't steer it, but man would it pull.
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