From: Don Ledger <dledger.nul> Date: Sun, 26 Jun 2011 12:42:48 -0300 Archived: Sun, 26 Jun 2011 16:05:15 -0400 Subject: Re: "Revolutionary" Wingless Aircraft >From: Martin Shough <parcellular.nul> >To: <post.nul> >Date: Sun, 26 Jun 2011 10:23:04 +0100 >Subject: Re: "Revolutionary" Wingless Aircraft >>From: Michael Tarbell <mtarbell.nul> >>To: post.nul >>Date: Sat, 25 Jun 2011 10:45:26 -0600 >>Subject: Re: "Revolutionary" Wingless Aircraft >>>From: Martin Shough <parcellular.nul> >>>To: <post.nul> >>>Date: Sat, 25 Jun 2011 10:01:59 +0100 >>>Subject: "Revolutionary" Wingless Aircraft >>>FYI. Hmmm... >>>----- >>>PysOrg.Com >>>http://tinyurl.com/6afchjz >>>Austrian Company Debuts Revolutionary Wingless Aircraft >><snip> >>See also >>http://www.gizmag.com/d-dalus-uav-design/18972/ >>which has several images and a little more commentary. With the >>sparse details provided, I'm having difficulty visualizing the >>principle involved. Nearest analog would seem to be a Voith >>Schneider propeller. All in all, seems too good to be true... I >>think "Hmmm" pretty well sums it up, pending a public >>demonstration, or at least a detailed video. >>Mike >I agree. The first article made my scam antennae twitch with >those "frictionless bearings". Yeah, right - nanokelvin >superfluid lubrication or whatever that can be "repaired by a >local car mechanic"? I think not! >This article somewhat redeems the claim in the form of "near- >frictionless bearings". OK. But as you say without even a video >of the small scale concept-demonstrator no one would be wise to >invest one yen, dollar, pound or sheckel. The principle is >obscure. >I'd never heard of Voith Schneider but like you I have trouble >seeing how this contraption of carbon fibre plough shares is >supposed to provide lift and 360 degree 3-D thrust vectoring in >near silence. I know there's a lot of computer control involved, >but basically, how can something at once so technically "crude" >and so operationally versatile not long ago have been exploited? >Or... has it? >Martin I had heard of this propeller in relation to vessel propulsion; tugs and minesweepers etc. Here's a drawing of the setup: http://www.voithturbo.com/de-pua-marine-vspropeller-demprogramm.php Wikipedia here: http://en.wikipedia.org/wiki/Voith_Schneider_Propeller You can see that where it would-and does- work on a boat where weight and room aren't a problem however it seems a bit of a stretch for an aircraft, certainly if configured in a conventional manner. It's individual blade function in a way mimics a helicopter rotor blade's angle of attack/rotor tilt depending on where each rotor blade is in relation to the direction of flight. Don Ledger Listen to 'Strange Days... Indeed' - The PodCast At: http://www.virtuallystrange.net/ufo/sdi/program/ These contents above are copyright of the author and UFO UpDates - Toronto. They may not be reproduced without the express permission of both parties and are intended for educational use only.
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