Return-Path: Received: from fed1rmmtao09.cox.net ([68.230.241.30] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 613017 for flyrotary@lancaironline.net; Wed, 19 Jan 2005 10:39:35 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.30; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao09.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with ESMTP id <20050119153904.QXXC21241.fed1rmmtao09.cox.net@BigAl> for ; Wed, 19 Jan 2005 10:39:04 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Comparison of pressure drops with different coolants Date: Wed, 19 Jan 2005 07:39:20 -0800 Message-ID: <001901c4fe3d$0b17b620$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001A_01C4FDF9.FCF47620" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_001A_01C4FDF9.FCF47620 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =20 Typically our tube diameters are less than 2=94; maybe 1 =96 1 =BD=94, = which increases the percentage difference a bit. But also in the typical = system the biggest chunk of pressure drop is through the radiator, where I = think the velocities in the tubes may get up to more like 10 =96 15 ft/sec. =20 =20 On further that tube velocity is probably too high, it is more likely = that it is roughly 5 ft/sec at cruise conditions, but of course depends = entirely on rad design. (In case anybody cared :-)) =20 Al ------=_NextPart_000_001A_01C4FDF9.FCF47620 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

 

Typically our tube diameters are less than 2”; maybe 1 – 1 =BD”, = which increases the percentage difference a bit.  But also in the typical = system the biggest chunk of pressure drop is through the radiator, where I = think the velocities in the tubes may get up to more like 10 – 15 = ft/sec. 

 

On further = that tube velocity is probably too high, it is more likely that it is roughly 5 = ft/sec at cruise conditions, but of course depends entirely on rad design. (In = case anybody cared J)

 <= /font>

Al

------=_NextPart_000_001A_01C4FDF9.FCF47620--