Here are some things that i thought would be good:
1. Tripod leg base system for support
2. Motor or hand crank operated lifting system
3. Axiel rotation system to move load out the way.
4. Hollow circular cross section to decrease weight.
Ill load a drawing once i get my home computer running again
(its decided to pack up and die =/)
Adam
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Reaction to Adam's initial concept ideas...
ReplyDelete1. I think a tripod is a good idea for the legs as they are useful over uneven terrain. How about making them height adjustable? This way we can ensure the crane is always as upright as possible, minimising any unusual angles of stress.
2. For a lift system, I propose something similar to a hydraulic car jack. If a car jack can lift a car (approx 1.5 tonnes for a hatchback) with minimal physical exersion, we can easily utilise this method for lifting 1000kgs.
3. Like the idea of moving the load by rotating the crane, but we will have to take into account any horizontal bending moments as well as the vertical.
4. I'm not sure hollow circular cross sections will be strong enough, especially on uneven ground. Plus if it took a knock resulting in a dent, it could easily buckle under load. I think we should use I-beams with cut out diamond sections along the vertical face. This minimises weight but will give us a lot more strength. We should have a look at the properties of different cross sections for the frame.
Will