Quote:
Originally Posted by rich2468
Bill, wouldn't a simple boat trailer crank wench provide more than enough torque to pull your shell up and forward?
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Rich -
It certainly would have adequate power. The remaining issue is that the force has to change direction midway through. It has to start in the straight up direction, but then has to start rolling toward a forward direction as the shell rises.It doesn't have to pull until the shell is all the way out - though that would be OK - but the roll has to at least start.
That is the advantage of a gin pole - it starts lifting upward, but then swings toward a flat pull. Gin poles are used for raising radio towers or ship's masts, for example, that are lying flat on the ground, and need to end up in an upright position. That is exactly what is needed here. I'll try to redo yesterday's terrible sketch.
Bill