LEGO SYSTEM Adventurers : 550


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Subject:	Re: Any ideas on how to do this with Technic?
Newsgroups:	lugnet.technic, lugnet.adventurers
Date:	Tue, 30 Nov 1999 21:28:02 GMT
Viewed:	34 times

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, I'd rather use motor for other projects. Maynes' friction-through-many-gears idea is the first idea I had, but his fan idea is quite good. Fredrik's pulley-elastic band idea is also interesting. This pendulum idea is really what I was looking for, though! A true mechanical speed-regulator, very nifty indeed. (I was trying to think of similar real-life machines, why didn't I think of clocks?) I think I'll try it. Thanks! (I don't have much technic lego, so I wanted to figure out a good method *before* I hit the auctions and brick-selling sites to get pieces.) -- Paul Davidson, aka Tinman www.theforce.net | Your Daily Dose of Star Wars www.filmforce.net | Your Daily Dose of Film News Opens everywhere, January 2000 Fredrik Glöckner <fredrik.glockner@bio.uio.no> wrote in message news:m34se4vyyz.fsf@sade.uio.no... > "Paul Davidson" <tinman@direct.ca> writes: > > > Without any further mechanical apparatus, this will plunge downward at > > whatever acceleration gravity exerts, coming to a final crash at the • bottom. > > Is there any kind of gearing I can add (without using motors) that can • slow > > this motion? I.e., is there a way to have the structure *slowly* sink > > rather than suddenly? > > 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: > > http://carol.wins.uva.nl/~leo/lego/clock.html > > You only need the pendulum, escapement and cogwheel part. The idea > would be to use the weight of the base to drive the escapement and a > pendulum to make sure the escapement turns at a constant speed. > > As an added bonus, you would get the "tick-tock" sounds as the base > sinks. > > This would be very cool! I'm almost tempted to make something like this > myself. > > Fredrik

Message has 2 Replies:

		Re: Any ideas on how to do this with Technic?
(...) Counter-weight through a pulley or gear system? A lessening counter-weight (classic sand displacement)? Bruce (25 years ago, 30-Nov-99, to lugnet.technic, lugnet.adventurers)

		Re: Any ideas on how to do this with Technic?
(...) It wasn't me, 'twas Steve Bliss. (...) This sounds like a very interesting project indeed! You should report back if you succeed with this. You need to connect the weight of the base to the pendulum. How are you going to do that? You can have (...) (25 years ago, 1-Dec-99, to lugnet.technic, lugnet.adventurers)

Message is in Reply To:

		Re: Any ideas on how to do this with Technic?
(...) 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 (...) (25 years ago, 30-Nov-99, to lugnet.technic, lugnet.adventurers)

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