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(...) That strange, thick, white gear in the RIS slips with drag that appears proportional to the rotation rate, so it's a dampener, which is what you want. Dave Paule (26 years ago, 1-Dec-99, to lugnet.technic, lugnet.adventurers)
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I see. I understand what you're saying. The main thing I'm looking for in this case, though, is a constant downward speed which does not accelerate. Your ideas are interesting though, I will probably incorporate them into future projects (a working (...) (26 years ago, 1-Dec-99, to lugnet.technic, lugnet.adventurers)
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(...) Not entirely true. Your thinking of the "what falls faster, a tonne of lead or a tonne of feathers" question (or - "what's heavier, a tonne of lead or a tonne of feathers") which is actually more complicated than it seems. The thing with a (...) (26 years ago, 1-Dec-99, to lugnet.technic, lugnet.adventurers)
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A counterweight doesn't change the speed at which something falls, does it? It may reduce the apparent weight of the main structure, but objects of different weights fall equally fast. -- Paul Davidson, aka Tinman www.theforce.net | Your Daily Dose (...) (26 years ago, 1-Dec-99, to lugnet.technic, lugnet.adventurers)
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| | Re: Any ideas on how to do this with Technic?
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(...) Counter-weight through a pulley or gear system? A lessening counter-weight (classic sand displacement)? Bruce (26 years ago, 30-Nov-99, to lugnet.technic, lugnet.adventurers)
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I've received some very good responses here. Jacob Andersen's worm gear idea is what I would do if I were to use a motor, but since gravity already provides energy for the system, a good engineering solution would not use an additional motor. Plus, (...) (26 years ago, 30-Nov-99, to lugnet.technic, lugnet.adventurers)
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| | Re: Set 5909
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(...) to (...) quantity (...) Amazon.com now has set 5909 available for $19.99. Better grab it soon, since I don't think they'll last. Kevin (26 years ago, 30-Nov-99, to lugnet.adventurers)
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| | Re: Any ideas on how to do this with Technic?
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Paul Davidson: [ Structure sinking into the ground at constant speed ] I would see if I could do something with some worm screws (LDraw part 4716), a micro motor (LDraw part 2986), and maybe some gear racks (LDraw part 3743). The worm screws will (...) (26 years ago, 30-Nov-99, to lugnet.technic, lugnet.adventurers)
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| | Re: Any ideas on how to do this with Technic?
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(...) You can use an pendulum clock to time the mechanism so that it sinks at a constant speed. No, I'm not kidding! Take a look at Leo Dorst's LEGO clock: (URL) only need the pendulum, escapement and cogwheel part. The idea would be to use the (...) (26 years ago, 30-Nov-99, to lugnet.technic, lugnet.adventurers)
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| | Re: Any ideas on how to do this with Technic?
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(...) Hmm. Use a pair of pulleys, one attached to the same axle as the gear being turned against the rack. The other pulley should be attached to the same frame as the first, so they move together as the building sinks. This second pulley should (...) (26 years ago, 30-Nov-99, to lugnet.technic, lugnet.adventurers)
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