Looks to me like a simple "Class 2" Lever. Ref: http://plaza.ufl.edu/luzmaria/LEVERS/class2levers.html
Actual tongue weight is the weight measured on the scale x the ratio of the distances between the fulcrum (deadman) and the measuring device. If the tongue were on the measuring device it would be 100% of reading on scale. If on the Fulcrum, 0%. Anywhere between is the ratio of the two distances. If it were in the center it's be 50% of the reading. If ¼ distance from fulcrum, 25%. If ¼ the distance from the scale, 75%.......all "rough order of magnitude" since exacts would include resistances at both ends of the bar and the weight of the bar and all that stuff.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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