X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 13 Jun 2009 07:45:49 -0400 Message-ID: X-Original-Return-Path: Received: from mta31.charter.net ([216.33.127.82] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3681084 for lml@lancaironline.net; Fri, 12 Jun 2009 19:37:12 -0400 Received-SPF: pass receiver=logan.com; client-ip=216.33.127.82; envelope-from=troneill@charter.net Received: from imp09 ([10.20.200.9]) by mta31.charter.net (InterMail vM.7.09.01.00 201-2219-108-20080618) with ESMTP id <20090612233637.WLM2647.mta31.charter.net@imp09> for ; Fri, 12 Jun 2009 19:36:37 -0400 Received: from axs ([75.132.241.174]) by imp09 with smtp.charter.net id 3Bcc1c00A3mUFT705Bcc0a; Fri, 12 Jun 2009 19:36:37 -0400 X-Original-Message-ID: <4DBFC60624C34DFB900596872526AAE1@axs> From: "terrence o'neill" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: 235 gear down speed? X-Original-Date: Fri, 12 Jun 2009 18:36:32 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001C_01C9EB8C.B5614790" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-PCToolsMIME: Updated by PC Tools Mime Parser 1.0.0.4 This is a multi-part message in MIME format. ------=_NextPart_000_001C_01C9EB8C.B5614790 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Rid, Good observation.=20 Terrence ----- Original Message -----=20 From: Rod Pharis=20 To: lml=40lancaironline.net=20 Sent: Friday, June 12, 2009 15:37 Subject: =5BLML=5D Re: 235 gear down speed? Likely because with the nose gear open the air pressure is the same on = top and bottom (maybe even higher on the bottom due to higher angle of = attack). On a top-down air-flow system, to force cool air flow through = the cylinder fins and the oil cooler, the air pressure must be higher on = the top, and lower on the bottom. Therefore, the nose gear door must be = closed to achieve optimum (or perhaps any) air flow where it needs to be = most. Rod E-mail message checked by Internet Security (6.0.1.441) Database version: 6.12590 http://www.pctools.com/en/internet-security/ ------=_NextPart_000_001C_01C9EB8C.B5614790 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <=21DOCTYPE HTML PUBLIC =22-//W3C//DTD HTML 4.0 Transitional//EN=22>
Rid,
Good observation. =
Terrence
----- Original Message -----
From:=20 Rod Pharis=20
Sent: Friday, June 12, 2009 = 15:37
Subject: =5BLML=5D Re: 235 = gear down=20 speed?

Likely because with the nose gear open the air = pressure=20 is the same on top and bottom (maybe even higher on the bottom due to = higher=20 angle of attack).  On a top-down air-flow system, to force cool air = flow=20 through the cylinder fins and the oil cooler, the air pressure must be = higher=20 on the top, and lower on the bottom.  Therefore, the nose gear door = must=20 be closed to achieve optimum (or perhaps any) air flow where it needs to = be=20 most.
 
Rod
 


=

E-mail message = checked by Internet Security (6.0.1.441)
Database version: = 6.12590
http://www.pctool= s.com/internet-security/
 ------=_NextPart_000_001C_01C9EB8C.B5614790--