Subject:
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Re: Six Shooter
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 29 Dec 1999 09:56:29 GMT
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Viewed:
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893 times
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Harri 'Junkarn' Manni wrote:
> Please mail me if you have made something similliar.
How similar is similar enough?
I built a self-loading catapult that was powered by cocking the arm
against two #64 rubber bands. At its best it could fire the projectile 8
feet before first contact with the ground, with a total distance of
about 15-17 feet on an unobstructed hard floor. (Distances measured from
the point where the missile separates from the catapult arm; I used
yellow rims on length 3 axles, mainly because my loader could deliver
those reliably one at a time to the catapult arm). However the force of
the rubber bands was too much and the catapult had difficulty staying in
one piece over several successive rounds of firing; lessening the
tension led to dissappointing distances (3-4 feet). I should also note
that I ruined one 8-tooth gear during experimentation by subjecting it
to excessive force, and the base of the catapult arm required 5 axles to
avoid twisting the axle out of shape when the arm was loaded. I
dismantled it after giving up on that design; I only kept the loader
because it was about all that worked reliably :-(
Others have build working and reliable catapults driven directly by two
motors which could fire projectiles 5 feet before first contact with the
ground, but I can no longer find their WWW sites.
alex
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Message is in Reply To:
 | | Six Shooter
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| Hello! I wonder if there is anyone else that has built a Mindstorms robot that "shoots" stuff around? I wanted to build something that I haven't seen made before with RIS. (Like if that would ever happen) :) It started with a idea to bulid a Lego (...) (25 years ago, 29-Dec-99, to lugnet.robotics)
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