X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3887344 for flyrotary@lancaironline.net; Thu, 15 Oct 2009 18:15:40 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta04.mail.rr.com with ESMTP id <20091015221503969.RQBI13254@cdptpa-omta04.mail.rr.com> for ; Thu, 15 Oct 2009 22:15:03 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] off subject - dyson fan defies physics Date: Thu, 15 Oct 2009 18:15:04 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0079_01CA4DC3.6BE0DA60" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 In-Reply-To: Thread-Index: AcpNsy4E2Y1Mgpo8RpW44I8kQ2Z0bQAHDPIw Message-Id: <20091015221503969.RQBI13254@cdptpa-omta04.mail.rr.com> This is a multi-part message in MIME format. ------=_NextPart_000_0079_01CA4DC3.6BE0DA60 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit 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. 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. 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?: 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". I think I'll wait a bit before buying stock in the company 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 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_0079_01CA4DC3.6BE0DA60 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

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.

 

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.

 

 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?:

 

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”.

 

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

 

ed

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

 

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]



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The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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