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Old Jan 29, 2013, 10:15 AM
pyronaught is offline
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Methane does seem like a good alternative that could keep RC blimps going even if the helium shortage makes helium unobtainable, at least with larger size blimps. It's much cheaper, much more available, much easier to keep from leaking over time and much less flammable than hydrogen when contaminated with air. The only down side is having half as much lift as helium, but that is at least a manageable problem.
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