X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 07 Aug 2008 16:09:03 -0400 Message-ID: X-Original-Return-Path: Received: from web53712.mail.re2.yahoo.com ([206.190.39.61] verified) by logan.com (CommuniGate Pro SMTP 5.2.6) with SMTP id 3065169 for lml@lancaironline.net; Thu, 07 Aug 2008 00:14:04 -0400 Received: (qmail 44661 invoked by uid 60001); 7 Aug 2008 04:14:04 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Received:X-Mailer:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type:Message-ID; b=GOheVMjdUdD1JwqXLUvrbOemrgPyKKvHckSZeuWual/5091LSRB92Vl5SAbJSaPJq7JK/Bf6KTO7CyudDDqbsHiY82SA4sGxt+4yKtqdh7dCD2q4IVpl9a7A/CDYChPm/hHfP/NUlifVrYyKk1NkHOcDy35626lbYS13oAKyKcA=; Received: from [66.32.31.102] by web53712.mail.re2.yahoo.com via HTTP; Wed, 06 Aug 2008 21:14:04 PDT X-Mailer: YahooMailWebService/0.7.218 X-Original-Date: Wed, 6 Aug 2008 21:14:04 -0700 (PDT) From: Kyrilian Dyer Reply-To: kyrilian_av@yahoo.com Subject: Re: [LML] Legacy Tail Mounted Cabin Vent X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-561935095-1218082444=:44414" X-Original-Message-ID: <617507.44414.qm@web53712.mail.re2.yahoo.com> --0-561935095-1218082444=:44414 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Check into how folks have installed and plumbed their AC systems.=A0 For in= stance, here are some pictures of the late Shannon Knoepflein's aircraft un= der construction: =A0 http://w1.lancaironline.net/pix/shannon-apr03 =A0 http://w1.lancaironline.net/pix/shannon-apr03/paint_transfer_back_001 It looks like he installed it on the right side of the forward fillet area = of the vertical stab.=A0 I'm not sure how well this worked, though I imagin= e some others on the list have installed AC systems as well. Let us know how it works! =A0Cheers, - Kyrilian =A0 L2K-236 --- On Wed, 8/6/08, Clark Baker wrote: From: Clark Baker Subject: [LML] Legacy Tail Mounted Cabin Vent To: lml@lancaironline.net Date: Wednesday, August 6, 2008, 9:31 PM I am considering a tail mounted NACA scoop in the tail of my Legacy (will s= till have the factory vents running to panel mounted eyeball vents).=A0 Noi= se reduction is my primary reason for considering this.=A0 I modified my st= ock located 360 cabin vents (reshaped the inlets and redid the plenum) so t= hey flow decent on the ground, very well in climb, and blast away at high s= peed cruise.=A0 However, as Scott Kreuger and others have pointed out, they= are very noisy,=A0materially increasing=A0the cockpit noise level.=A0 The = option of the extra flow of more vents would be a further plus. =A0 I am looking at the ACS NACA vent 902 MA-A that has an opening of 5.5" x 2.= 5" with a 2" diameter outlet.=A0 I would run this to a small overhead conso= le that I am building to hold map and dome lights.=A0 =A0 Has anyone done this on the Legacy?=A0 I would appreciate any thoughts on h= ow effective the noise reduction might.=A0 Also, any tthoughts on where the= best location for the NACA vent might be?=A0 I would think the pilot's sid= e would be less susceptible to taking in exhaust (I noticed that an oil lea= k on my 360 wrapped around up the copilot's side of the rudder. =A0 =A0 Clark Baker LNC2 360- 950hrs=20 L2K in progress =A0 =A0 =A0 =A0 =A0 =A0 >>>----- Original Message ----- From: "Roger Iverin" To: Sent: Saturday, July 26, 2008 5:30 AM Subject: [LML] Your best modification/upgrade etc. My best Mod, the one I most appreciated was the NACA air duct installed in = the vertical stab together with an air plenum with a low end with a water d= rain in the vertical stab and rear tail cone area. I then installed a half = tube formed from a split pvc pipe about 4 inches OD affixed on the top unde= rside of the fuselage forward along the fuselage seam which was duct taped = and a one bid fiberglass layup applied which became the permanent air tube = forward.=A0 I then constructed an air box just behind the fuselage rollover= bar imediately behind the canopy and above the seat back. <<<< =0A=0A=0A --0-561935095-1218082444=:44414 Content-Type: text/html; charset=us-ascii
Check into how folks have installed and plumbed their AC systems.  For instance, here are some pictures of the late Shannon Knoepflein's aircraft under construction:
  http://w1.lancaironline.net/pix/shannon-apr03
  http://w1.lancaironline.net/pix/shannon-apr03/paint_transfer_back_001

It looks like he installed it on the right side of the forward fillet area of the vertical stab.  I'm not sure how well this worked, though I imagine some others on the list have installed AC systems as well.

Let us know how it works!

 Cheers,
- Kyrilian
  L2K-236

--- On Wed, 8/6/08, Clark Baker <bakercdb@gmail.com> wrote:
From: Clark Baker <bakercdb@gmail.com>
Subject: [LML] Legacy Tail Mounted Cabin Vent
To: lml@lancaironline.net
Date: Wednesday, August 6, 2008, 9:31 PM

I am considering a tail mounted NACA scoop in the tail of my Legacy (will still have the factory vents running to panel mounted eyeball vents).  Noise reduction is my primary reason for considering this.  I modified my stock located 360 cabin vents (reshaped the inlets and redid the plenum) so they flow decent on the ground, very well in climb, and blast away at high speed cruise.  However, as Scott Kreuger and others have pointed out, they are very noisy, materially increasing the cockpit noise level.  The option of the extra flow of more vents would be a further plus.
 
I am looking at the ACS NACA vent 902 MA-A that has an opening of 5.5" x 2.5" with a 2" diameter outlet.  I would run this to a small overhead console that I am building to hold map and dome lights. 
 
Has anyone done this on the Legacy?  I would appreciate any thoughts on how effective the noise reduction might.  Also, any tthoughts on where the best location for the NACA vent might be?  I would think the pilot's side would be less susceptible to taking in exhaust (I noticed that an oil leak on my 360 wrapped around up the copilot's side of the rudder.
 
 
Clark Baker
LNC2 360- 950hrs
L2K in progress
 
 
 
 
 
 
>>>----- Original Message ----- From: "Roger Iverin" <roger@iverin.com>
To: <lml@lancaironline.net>
Sent: Saturday, July 26, 2008 5:30 AM
Subject: [LML] Your best modification/upgrade etc.
My best Mod, the one I most appreciated was the NACA air duct installed in the vertical stab together with an air plenum with a low end with a water drain in the vertical stab and rear tail cone area. I then installed a half tube formed from a split pvc pipe about 4 inches OD affixed on the top underside of the fuselage forward along the fuselage seam which was duct taped and a one bid fiberglass layup applied which became the permanent air tube forward.  I then constructed an air box just behind the fuselage rollover bar imediately behind the canopy and above the seat back. <<<<

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