X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3887450 for flyrotary@lancaironline.net; Thu, 15 Oct 2009 20:02:42 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (sv1-1.per.aanet.com.au [203.24.100.68]) by poplet2.per.eftel.com (Postfix) with ESMTP id 97C3317356F for ; Fri, 16 Oct 2009 08:02:05 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id C3D52BEC013 for ; Fri, 16 Oct 2009 08:01:51 +0800 (WST) Message-ID: <52889564FA474670BAD8E1B4202601CC@ownerf1fc517b8> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: off subject - dyson fan defies physics Date: Fri, 16 Oct 2009 09:59:14 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01CA4E47.5152B5E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 091015-0, 10/15/2009), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0011_01CA4E47.5152B5E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ed,=20 I think your right in that their using the principles of Exhaust = Augmentation or Inducement (1); coupled with the correctly shaped = airfoil within the shroud/ ring (2). To be fair there are no flan blades in the conventional sense of a fan. = The blower/ fan pushes air through the motor ( good point and bonus). Probably works OK, but a bit gimmicky. George (down under) Well, I must confess to being skeptical about such claims and when = there appears to be a clear attempt to mislead, it heightens my doubts = even more. =20 Here is what I found, first, it DOES have a motor and Fan Blade - so = why the claim it is "bladeless" . They appear to channel air up to the = ring and with air flowing from the slits (air motion caused by the fan = blades in the base of the unit) causes external air to be channeled = along with the fan induced flow. A Bunsen burner does the same thing in = principle the hot exhausting air pulls in fresh air at the base. Now = the real question is how this fan induced flow is capable of inducting = a 15 time greater flow of air. The principal would appear to be the = same as exhaust augmentation with a lot less energy. So don't see any = deifying of the laws of physics so far. =20 But, if it works for the dyson fan, then why not get 15 times {:>) = your current cooling air flow sitting on the ground with your engine = running?: =20 Dyson unveils blade-free fan The Dyson fan has a conventional motor and fan blade in the base. The = air flows from the base into the upper ring structure. No magic there. = The magic is in the ring structure, where the air flows out a slit = around the front edge of the ring. Here a process called inducement is = put to work. The air flowing out of the slit recruits surrounding air = because of the configuration of the slit. So now there is more air = flowing through the ring structure than there would be from the base fan = alone. Dyson claims that inducement creates a 15x amplification in = airflow. Hence the name "Dyson Air Multiplier".=20 =20 I think I'll wait a bit before buying stock in the company =20 ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of kevin lane Sent: Thursday, October 15, 2009 12:18 PM To: Rotary motors in aircraft Subject: [FlyRotary] off subject - dyson fan defies physics =20 Ed - I was thinking of all your diagrams on turbulent inlet vent air = flows when I saw a diagram of the new dyson fan. they claim a sort of = laser beam air flow capabilities. I guess it truly is "revolutionary"! = kevin [maybe my plane doesn't need a propeller] __________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ------=_NextPart_000_0011_01CA4E47.5152B5E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 Ed,
I think your right in that their using = the=20 principles of Exhaust Augmentation or Inducement (1); coupled=20 with the  correctly shaped airfoil within = the shroud/ ring=20 (2).
 
To be fair there are no flan blades in = the=20 conventional sense of a fan. The blower/ fan pushes air through the = motor ( good=20 point and bonus).
Probably works OK, but a bit = gimmicky.
George (down under)

Well, I = must confess=20 to being skeptical about such claims and when there appears to be a = clear=20 attempt to mislead, it heightens my doubts even=20 more.

 

Here is = what I found,=20 first, it DOES have a motor and Fan Blade =96 so why the claim it is = =93bladeless=94=20 .  They appear to channel air up to the ring and with air flowing = from=20 the slits (air motion caused by the fan blades in the base of the = unit) causes=20 external air to be channeled along with the fan induced flow.  A = Bunsen=20 burner does the same thing in principle the hot exhausting air pulls = in fresh=20 air at the base.  Now the real question is how this fan induced = flow=20  is capable of inducting a 15 time greater flow of air.  The = principal would appear to be the same as exhaust augmentation with a = lot less=20 energy.  So don=92t see any deifying of the laws of physics so=20 far.

 

 But, =  if=20 it works for the dyson fan, then why not get 15 times {:>) your = current=20 cooling air flow sitting on the ground with your engine=20 running?:

 

Dyson = unveils=20 blade-free fan

The Dyson fan has a conventional motor and = fan blade=20 in the base. The air flows from the base into the upper ring = structure. No=20 magic there. The magic is in the ring structure, where the air flows = out a=20 slit around the front edge of the ring. Here a process called = inducement is=20 put to work. The air flowing out of the slit recruits surrounding air = because=20 of the configuration of the slit. So now there is more air flowing = through the=20 ring structure than there would be from the base fan alone. Dyson = claims that=20 inducement creates a 15x amplification in airflow. Hence the name = =93Dyson Air=20 Multiplier=94.

 

I think = I=92ll wait a=20 bit before buying stock in the company

 

ed

Ed=20 Anderson

Rv-6A = N494BW Rotary=20 Powered

Matthews,=20 NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.r= otaryaviation.com/Rotorhead%20Truth.htm

From: Rotary=20 motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of kevin = lane
Sent: Thursday, October 15, = 2009 12:18=20 PM
To: Rotary = motors in=20 aircraft
Subject: = [FlyRotary]=20 off subject - dyson fan defies = physics

 

Ed - I was = thinking of=20 all your diagrams on turbulent inlet vent air flows when I saw a = diagram=20 of the new dyson fan.  they claim a sort of laser beam air flow=20 capabilities.  I guess it truly is = "revolutionary"!   =20 kevin   [maybe my plane doesn't need a=20 propeller]



__________ Information from ESET = NOD32=20 Antivirus, version of virus signature database 3267 (20080714)=20 __________

The message was checked by ESET NOD32 = Antivirus.

http://www.eset.com

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