Subject:
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Sometimes LEGO makes me crazy
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Newsgroups:
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lugnet.general
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Date:
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Mon, 2 Jul 2007 12:35:12 GMT
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Viewed:
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3068 times
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A while ago I built a wind tunnel, and I've been wanting to try out the
Exo-Force turbines to see if they can provide any more propulsion than the
propellers I've been using. After all, they have more blades and the blades have
a greater pitch than the propellers.
Well I finally got around to it experimenting with them, and during my testing
it seemed that when I ran them one way I had air movement coming from the
center, and then from the perimeter when I ran them the other way.
So, I stopped them to take a closer look, and it turns out that the inner circle
of blades are pitched one way and the outer circle blades are pitched the other
way! What's with that?
So, they're completely useless to me. Of course, this also means the Exo-Force
machines can't fly!
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Message has 2 Replies:
 | | Re: Sometimes LEGO makes me crazy
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| (...) Sounds like an interesting problem you're facing. Although the blade area is still quite small, the LEGO Znap large wheels, 68mm (if you can find them) have a blade profile which should be able to drive a small wind tunnel. See this part (...) (17 years ago, 2-Jul-07, to lugnet.general, FTX)
| | | Re: Sometimes LEGO makes me crazy
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| (...) Yeah, I had almost exactly the same revelation, but examined the blades first. I've tried to come up with a ducting that would make them useful (they will "pump" air if you could route the central outflow back into the annular "inflow", and (...) (17 years ago, 2-Jul-07, to lugnet.general)
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