 | | Re: Advice from crane builders (was: Blimey) —Ross Crawford
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| | | (...) OK, I wanna ask some advice on this one from the big crane builders (yeah that's you!!) I was aiming to be able to lift the a-frame mechanically, but so far have found no solution. I would have liked to use pneumatics, but with the a-frame (...) (21 years ago, 5-Apr-04, to lugnet.technic, FTX)
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| | | | | Re: Advice from crane builders (was: Blimey) —Steven Lane
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| | | | | (...) Well on my crane I went straight for the HOG approach, I didn't actually find out how the A frame was raised on the prototype until after completion. I did consider retrofitting a solution but the prototype utilised a big fat multi telescopic (...) (21 years ago, 5-Apr-04, to lugnet.technic, FTX)
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| | | | | Re: Advice from crane builders (was: Blimey) —Thomas Avery
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| | | | | (...) I agree with Steve. HOG it! Besides, your MOC will have so many mechnical parts, eliminating the A-frame cylinders will make it more simple and your life easier, IMO. -TJ (21 years ago, 5-Apr-04, to lugnet.technic)
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| | | | | Re: Advice from crane builders (was: Blimey) —Dennis Bosman
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| | | | (...) A friend of mine is building the Liebherr LGD1800 of Riga Mainz (the Spacelifter). (2 URLs) He tried to lift the A-frame with Technic beams + gear racks. He used 12V motors (the round ones). It didn't work very well. His crane is on scale (...) (21 years ago, 2-May-04, to lugnet.technic, FTX)
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| | | | | | Re: Advice from crane builders (was: Blimey) —Ross Crawford
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| | | | (...) Hmmmm. I just looked closely at that pic, and can see the a-frame line is reversed once (goes across to opposite side of pulley). I've noticed some cranes do this, and some don't - some do it more than once - none of the DEMAG ones I've seen (...) (21 years ago, 16-May-04, to lugnet.technic, FTX)
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