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Forums
Engineering
General Engineering
Boom Angle of Crane: Is High Extension Necessary?
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[QUOTE="tech99, post: 6411956, member: 477979"] It is possible for the ground crew to move the boat around to a limited extent, which pulls the suspension wire out of vertical. When they do this, there is a restoring force equal to Weight x Sin (angle of deflection). If the wire is very long, the angle of deflection is smaller, so the restoring force is less. For example, a boat weighs 1t and the wire is 2 degs out of vertical. Restoring force = 1 x sin 2 = 0.03t. By the same token, if the wire is 20m long, then the boat has been moved by 20 sin 2 = 0.7m. [/QUOTE]
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Engineering
General Engineering
Boom Angle of Crane: Is High Extension Necessary?
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