Subject:
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Re: I need a Propeller
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 23 Nov 1999 00:14:23 GMT
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Original-From:
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dave madden <dhm@mersenne.!Spamcake!com>
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Viewed:
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699 times
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=>From: "Stefan Elsner" <spamtrap02@lowpoly.com>
=>....
=>for a MindStorms project I need a (working) propeller. I plan to drive it
=>with two of the old-style 9V motors. It should move as much air as possible.
=>I estimate that the diameter should be somewhere between three and four
=>inches. I wonder what the best way to go is: [...]
If you're not a LEGO(r) purist, then I'd suggest a model airplane
prop. You can get many different diameters and pitches, and they're
specifically designed to move as much air as possible. (Or more
likely designed for that purpose than LEGO(r) propellers! :-) I'd
guess that you could easily drill out the hole and epoxy in a
half-bushing for a clean solution.
d.
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Message has 2 Replies:
 | | Re: I need a Propeller
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| Well, if model airplane props were for moving air, then every house fan would have one. Prop design is based on efficiency, not quantity of air moved. And the RPM environment, power available, fluid type, etc... None of the LEGO props are very good (...) (25 years ago, 23-Nov-99, to lugnet.robotics)
| | | Re: I need a Propeller
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| Hi Dave, I'll take a non Lego part only as a last resort, especially with this project. I think I'll get the Mini-Heli and do some tests. Looks very much like the propellers I got with my Cox engines some time ago. Gearing two old-style technic (...) (25 years ago, 23-Nov-99, to lugnet.robotics)
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Message is in Reply To:
| | I need a Propeller
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| Hi, for a MindStorms project I need a (working) propeller. I plan to drive it with two of the old-style 9V motors. It should move as much air as possible. I estimate that the diameter should be somewhere between three and four inches. I wonder what (...) (25 years ago, 23-Nov-99, to lugnet.robotics)
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