X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 11 Apr 2008 22:44:30 -0400 Message-ID: X-Original-Return-Path: Received: from mta10.adelphia.net ([68.168.78.202] verified) by logan.com (CommuniGate Pro SMTP 5.2.1) with ESMTP id 2842920 for lml@lancaironline.net; Fri, 11 Apr 2008 08:25:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=68.168.78.202; envelope-from=super_chipmunk@roadrunner.com Received: from Laptop ([74.75.176.139]) by mta10.adelphia.net (InterMail vM.6.01.05.02 201-2131-123-102-20050715) with SMTP id <20080411122531.XEAH7569.mta10.adelphia.net@Laptop> for ; Fri, 11 Apr 2008 08:25:31 -0400 X-Original-Message-ID: <889770999A874FA596FE6A1FDD5E563D@Laptop> From: "Bill Wade" X-Original-To: "Lancair Mailing List" References: In-Reply-To: Subject: Re: [LML] Re: IVP fresh air valve X-Original-Date: Fri, 11 Apr 2008 08:24:53 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6000.16480 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16545 I looked at the IV/IV-P Handbook but still have some questions- Does the NACA vent/blower provide good ventilation or would it be wise to build in another source as well? Does the flapper valve do a good job of sealing the duct in pressurized mode- especially if you change over in flight- or would it be helpful to install a positive valve of some sort? Thanks very much- Bill Wade IV-P