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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 (...) (17 years ago, 2-Jul-07, to lugnet.general)
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| | 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)
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| | Re: Sometimes LEGO makes me crazy
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(...) Thanks for the idea. I'm currnetly using two of these, (URL) nested together (they're apparently designed to do that) to make a four-bladed prop. I use four sets of them in an array. That seems to be my best option so far. Here are some pics: (...) (17 years ago, 2-Jul-07, to lugnet.general, FTX)
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| | 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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| | Re: Sometimes LEGO makes me crazy
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(...) You know, you would think I would have checked first. On the other hand, you know me, so perhaps you wouldn't think I would have checked first! (17 years ago, 2-Jul-07, to lugnet.general, FTX)
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| | Re: Sometimes LEGO makes me crazy
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(...) [snip] (...) Hi Duane, for a rectangular shape of a tunnel this propellor would not be perfectly right, but I would guess, that this is the so far best prop, which LEGO has done: (URL) a weak spot this one has the gear wheel fixed to the axle, (...) (17 years ago, 3-Jul-07, to lugnet.general)
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