Subject:
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Re: what's the best technic propeller?
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Newsgroups:
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lugnet.technic, lugnet.robotics
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Date:
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Tue, 1 Feb 2000 18:10:05 GMT
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Viewed:
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1985 times
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> So where can we see this project??
>
> --Ben
Well, it was kind of cheap and cheerful so I didn't bother to post it anywhere
(although it's still cluttering up my Lego lab). It's a long arm of technic
bricks, pivoted on a large Technic turntable. At one end is the RCX, at the other
end is another large turntable mounted vertically with the old 9V motor and the
propeller attached. There's two Lego weight elements dotted around so that the
whole thing is balanced with the weight *just* in favor of the RCX side of the
balance arm. When the motor is run, the propeller pushes the arm around until it
picks up enough rotational speed to start acting like a gyroscope -- the RCX comes
up off the floor, and the whole thing "flies" round and round.
I mounted the old 9V-motor-with-the-propeller assembly on a turntable so that
another (9V micro-) motor could change the aspect of the propeller (so that the
bot could maybe shift from flying round-and-round to a hovering position, and
then reverse direction to fly in the other direction). However, controlling the
shift from flight to hover turned out to be a tad tricky, and I was so busy with
my Hanoi Solver and Hosting in the Mindstorms forums, that I haven't worked up
enough steam to revisit the project and make it function properly.
Cheers
JP
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