Return-Path: Received: from sccrmhc11.comcast.net ([204.127.202.55] verified) by logan.com (CommuniGate Pro SMTP 4.2b6) with ESMTP id 231669 for flyrotary@lancaironline.net; Wed, 30 Jun 2004 07:33:30 -0400 Received: from 204.127.205.144 ([204.127.205.144]) by comcast.net (sccrmhc11) with SMTP id <20040630113259011001rn65e>; Wed, 30 Jun 2004 11:32:59 +0000 Received: from [166.102.160.133] by 204.127.205.144; Wed, 30 Jun 2004 11:32:58 +0000 From: kenpowell@comcast.net To: "Rotary motors in aircraft" Subject: Re: BF-109F Date: Wed, 30 Jun 2004 11:32:58 +0000 Message-Id: <063020041132.8772.40E2A4EA0007F5C300002244220073484004040A99019F020A05@comcast.net> X-Mailer: AT&T Message Center Version 1 (Jun 24 2004) X-Authenticated-Sender: a2VucG93ZWxsQGNvbWNhc3QubmV0 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_8772_1088595178_0" --NextPart_Webmail_9m3u9jl4l_8772_1088595178_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit BF-109 - I thought that we were talking about the water radiators in the wings which does not have a boundary layer bleed. Chin scoops do not typically need a bleed because the boudary layer at the front of an aircraft is typically very thin. As a matter of fact, this is probably why 'wing radiators' do not need a bleed - the leading edge is very close. Still. the implication of many has been that the Spitfire had compromised water cooling - somehow I don't think so. Ken Powell -------------- Original message -------------- > Good point, Ernest. Forgot how far forward the inlet was on the ME109 - not > been watching enough late WWII movies {:>). > > Ed > > Ed Anderson > RV-6A N494BW Rotary Powered > Matthews, NC > ----- Original Message ----- > From: "Ernest Christley" > To: "Rotary motors in aircraft" > Sent: Tuesday, June 29, 2004 10:53 PM > Subject: [FlyRotary] Re: BF-109F > > > > kenpowell@comcast.net wrote: > > > Hi Ed, > > > I have also read this many times but have never seen a boundary layer > bleed on a BF-109. I have considered method this for my RV-4 and looked at > many pictures of the 109. Attached is a picture of an 'F' model. > > > Ken Powell > > > > > > > The scoop is right at the the front of the plane. The boundary layer is > > going to be almost nill there to begin with. Compound that with the > > fact that the air has been accelerated by the nose curving up, and that > > the nose will be high when the cooling is need the most (climbout), so > > that the air is injested more directly. > > > > The problem with the P-51 was that the scoop was much further back on > > the plane, and the boundary layer had time to grow before it got there. > > > > -- > > http://www.ernest.isa-geek.org/ > > "Ignorance is mankinds normal state, > > alleviated by information and experience." > > Veeduber > > > > >> Homepage: http://www.flyrotary.com/ > > >> Archive: http://lancaironline.net/lists/flyrotary/List.html > > > > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html --NextPart_Webmail_9m3u9jl4l_8772_1088595178_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

BF-109 - I thought that we were talking about the water radiators in the wings which does not have a boundary layer bleed. Chin scoops do not typically need a bleed because the boudary layer at the front of an aircraft is typically very thin. As a matter of fact, this is probably why 'wing radiators' do not need a bleed - the leading edge is very close. Still. the implication of many has been that the Spitfire had compromised water cooling - somehow I don't think so.

Ken Powell

-------------- Original message --------------

> Good point, Ernest. Forgot how far forward the inlet was on the ME109 - not
> been watching enough late WWII movies {:>).
>
> Ed
>
> Ed Anderson
> RV-6A N494BW Rotary Powered
> Matthews, NC
> ----- Original Message -----
> From: "Ernest Christley"
> To: "Rotary motors in aircraft"
> Sent: Tuesday, June 29, 2004 10:53 PM
> Subject: [FlyRotary] Re: BF-109F
>
>
> > kenpowell@comcast.net wrote:
> > > Hi Ed,
> > > I have also read this many times but have never seen a boundary layer
> bleed on a BF-109. I have considered method this for my RV-4 and looked at
> many pictures of the 109. Attached is a picture of an 'F' model.
> > > Ken Powell
> > >
> >
> > The scoop is right at the the front of the plane. The boundary layer is
> > going to be almost nill there to begin with. Compound that with the
> > fact that the air has been accelerated by the nose curving up, and that
> > the nose will be high when the cooling is need the most (climbout), so
> > that the air is injested more directly.
> >
> > The problem with the P-51 was that the scoop was much further back on
> > the plane, and the boundary layer had time to grow before it got there.
> >
> > --
> > http://www.ernest.isa-geek.org/
> > "Ignorance is mankinds normal state,
> > alleviated by information and experience."
> > Veeduber
> >
> > >> Homepage: http://www.flyrotary.com/
> > >> Archive: http://lancaironline.net/lists/flyrotary/List.html
> >
>
>
>
> >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html

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