 | | Re: Human Powered Helicopter
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(...) Even though he only has to spin the rotors at 6.2 rpm and the total weight of all four blades is only 55.4kg, the sheer size of the “wing-span” is indeed daunting! (...) Ohh the co-axial rotors are just beyond sweet! I doubt I can sum it up (...) (20 years ago, 8-Aug-04, to lugnet.org.ca.rtltoronto)
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| | Re: Human Powered Helicopter
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(...) I think there was also a small Canadian built UAV for the US Navy that used counter rotating coaxial rotors... (URL) even if not coaxial (ie, CH-47) there doesn't seem to be any any out there with counter rotating rotors. Maybe they started on (...) (20 years ago, 8-Aug-04, to lugnet.org.ca.rtltoronto)
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| | Re: Human Powered Helicopter
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(...) -Iain (20 years ago, 8-Aug-04, to lugnet.org.ca.rtltoronto)
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| | Re: Human Powered Helicopter
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(...) 6.2rpm?!?!? As in, about once every ten seconds? Huh. That's pretty slow. Hmm, looks like you missed something there. The "inner" rotor (which actually has more surface area than the outer rotor) spins at 6.2rpm, but the outer rotor spins at a (...) (20 years ago, 8-Aug-04, to lugnet.org.ca.rtltoronto)
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| | Re: Human Powered Helicopter
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(...) I think I hear my cue... ;] Those claims, out of context, are misleading/exaggerated. The aircraft is certainly affected by winds, just not in the same way or with the same unique problems as a conventional tail-rotored aircraft (although it (...) (20 years ago, 10-Aug-04, to lugnet.org.ca.rtltoronto)
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| | Re: Human Powered Helicopter
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(...) The tandem rotor aircraft, e.g., CH-46 Sea Knight, CH-47 Chinook, have counter-rotating rotors. KDJ ___...___ LUGNETer #203, Ontario, Canada (20 years ago, 10-Aug-04, to lugnet.org.ca.rtltoronto)
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| | Re: Human Powered Helicopter
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(...) I think I meant there doesn't seem to be any commercial examples, agreeing with what Ivan posted... ...Ivan had some very specific criteria for his topic of discussion: -Non Russian -Coaxial -Commercial/Civilian -Rhymes with "orange" -Not made (...) (20 years ago, 10-Aug-04, to lugnet.org.ca.rtltoronto)
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| | Re: Human Powered Helicopter
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(...) Ahh, okay, now I bitecha. Yeah the Kaman K-Max arrangement is the closest. Not exactly coaxial, but pretty darn. But unfortuntely it rhymes with orange. ;] KDJ P.S., hey what's Aaron up to these days? ___...___ LUGNETer #203, Ontario, Canada (20 years ago, 10-Aug-04, to lugnet.org.ca.rtltoronto)
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