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Location: UFOUpDatesList.Com > 2011 > Jun > Jun 26

Re: "Revolutionary" Wingless Aircraft

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



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