Comments on: How many ways are there of getting off the ground?
http://ask.metafilter.com/240711/How-many-ways-are-there-of-getting-off-the-ground/
Comments on Ask MetaFilter post How many ways are there of getting off the ground?Thu, 09 May 2013 23:35:11 -0800Fri, 10 May 2013 00:17:49 -0800en-ushttp://blogs.law.harvard.edu/tech/rss60Question: How many ways are there of getting off the ground?
http://ask.metafilter.com/240711/How-many-ways-are-there-of-getting-off-the-ground
I've been taking an interest in model helicopter design, but I don't want to build a quadrotor. I want to make something a bit more unique. Looking around, I've found some really bizarre options, things like <a href="https://en.wikipedia.org/wiki/Flettner_airplane">Flettner aircraft</a> ("<a href="https://www.youtube.com/watch?v=Ra8y6gGotwY">the flying paint roller</a>"). I'd like to know just how many options for heavier than air flight there are. <br /><br /> Another weird one: the <a href="https://en.wikipedia.org/wiki/Cyclogyro">cyclogyro</a> (<a href="http://www.youtube.com/watch?v=bPdczsY3sOQ">field test</a>).<br>
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Wikipedia will only get me so far. It'll tell me about things I know to look for, like helicopter variants (tail-rotor, tandem, co-axial, multicopter, monocopter, what else?). I'd like to know if there are any obscure helicopter sub-categories or bizarre variations. Peculiar fixed wing designs might be interesting. I'd also like to know about any really nonstandard types of aircraft like Flettners and cyclogyros. <br>
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Here's a specific question: <a href="https://www.youtube.com/watch?v=5ChvTm8peuo">what is this?</a> I have no idea what it is or why it doesn't fall down and I would like to know. It's maker calls it a <a href="http://crazyplanes.de/u_rotators.htm">rotationsflugkoerper</a> but I can't read his German-language explanation and the English I've found is vague. Is that strange spinning geometry actually generating lift? How?post:ask.metafilter.com,2013:site.240711Thu, 09 May 2013 23:35:11 -0800justsomebodythatyouusedtoknowflightrcmodelaircraftdronepoweredhelicopterautogyronotazeppelinresolvedBy: XMLicious
http://ask.metafilter.com/240711/How-many-ways-are-there-of-getting-off-the-ground#3491559
Could that be a variant of a <a href="http://www.metafilter.com/84545/Its-not-too-early-in-history-to-be-exterminated-by-a-Dalek">ring wing</a>?comment:ask.metafilter.com,2013:site.240711-3491559Fri, 10 May 2013 00:17:49 -0800XMLiciousBy: sebastienbailard
http://ask.metafilter.com/240711/How-many-ways-are-there-of-getting-off-the-ground#3491569
There's the <a href="http://www.youtube.com/watch?v=KN4q1BNDjtk">autogyro</a>. And <a href="http://www.youtube.com/watch?v=kwC8MP6uOiQ">flying hovercraft</a>, of course. Along with the <a href="http://www.youtube.com/watch?v=qvxfo5oGaPA">overclocked</a> and <a href="http://www.youtube.com/watch?v=kNWfqVWC2KI">generic lawnmower</a>.<br>
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<em>Is that strange spinning geometry actually generating lift?</em><br>
Combination of ring-wing lift and just airscrew thrust? Model plane engines being what they are, you can glue onto a balsawood brick and make it fly.comment:ask.metafilter.com,2013:site.240711-3491569Fri, 10 May 2013 01:29:29 -0800sebastienbailardBy: ckape
http://ask.metafilter.com/240711/How-many-ways-are-there-of-getting-off-the-ground#3492090
I've always been fond of the eggbeater helicopter design, with two intermeshing rotors on axes of rotation that are at a slight angle to each other.comment:ask.metafilter.com,2013:site.240711-3492090Fri, 10 May 2013 14:05:34 -0800ckapeBy: justsomebodythatyouusedtoknow
http://ask.metafilter.com/240711/How-many-ways-are-there-of-getting-off-the-ground#3492120
ckape - that would be the tandem helicopter. It looks fiendishly difficult to get the transmission right. You really don't want the rotors to get out of synch.comment:ask.metafilter.com,2013:site.240711-3492120Fri, 10 May 2013 14:34:34 -0800justsomebodythatyouusedtoknowBy: ckape
http://ask.metafilter.com/240711/How-many-ways-are-there-of-getting-off-the-ground#3492151
Actually, I'm pretty sure that a tandem is the classic flying banana style with one lifting rotor at the front of the craft and another lifting rotor at the rear of the craft at a different height where they are not intermeshing at all. Generally tandem refers to having two items front to back.<br>
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And yes, I know they're difficult to pull off. The fact that it looks like it'll tear itself apart without actually tearing itself apart is all part of the charm.comment:ask.metafilter.com,2013:site.240711-3492151Fri, 10 May 2013 14:50:54 -0800ckapeBy: straw
http://ask.metafilter.com/240711/How-many-ways-are-there-of-getting-off-the-ground#3492555
The tandem is also something like the <a href="http://www.kaman.com/aerteospace/helicopters/products-services/k-max/">Kaman K-Max</a>, where the two rotor hubs are only separated by a few feet and the rotors are angled to pass by/through each other.<br>
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It's not a complex drive, though, you just mesh them with a gear. They have to counter-rotate anyway, and (to a basic approximation) you control a helicopter by varying blade pitch, not rotor speed, so you tie them to a single motor and forget about it.comment:ask.metafilter.com,2013:site.240711-3492555Sat, 11 May 2013 07:40:42 -0800straw