Bill D
Diamond
- Joined
- Apr 1, 2004
- Location
- Modesto, CA USA
I have noticed all the cheap engine cranes use a similar leg design. They have the legs splayed out at an angle of roughly 10 degrees from center. I have not actually measured the angle but the pictures all seem to be the same angle. Why was this angle chosen?
Or was it the first one was made this way and everyone just copied it. My OTC crane has three possible leg splay angles so they feel there is some reason for more then a fixed spacing.
I realize wider spacing is more stable but requires longer legs to be far enough beyound the lift hook point. The narrow spacing can get inside of tires etc while the widest spacing can go outside obstructions. I believe my OTC is wider at the fixed end then most so the narrow spacing is still stable enough for most work.
I could not find a good picture but the OTC legs are hinged to the frame at the back and pinned under a cross beam at one of three positions when in the working position.
Bill D
Or was it the first one was made this way and everyone just copied it. My OTC crane has three possible leg splay angles so they feel there is some reason for more then a fixed spacing.
I realize wider spacing is more stable but requires longer legs to be far enough beyound the lift hook point. The narrow spacing can get inside of tires etc while the widest spacing can go outside obstructions. I believe my OTC is wider at the fixed end then most so the narrow spacing is still stable enough for most work.
I could not find a good picture but the OTC legs are hinged to the frame at the back and pinned under a cross beam at one of three positions when in the working position.
Bill D
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