X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 30 [X] Return-Path: Sender: To: lml Date: Mon, 29 Jan 2007 09:38:29 -0500 Message-ID: X-Original-Return-Path: Received: from mail13.syd.optusnet.com.au ([211.29.132.194] verified) by logan.com (CommuniGate Pro SMTP 5.1.5) with ESMTPS id 1796330 for lml@lancaironline.net; Mon, 29 Jan 2007 05:10:55 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.194; envelope-from=fredmoreno@optusnet.com.au Received: from fred (optussatellitebintb.22bjipb002.optus.net.au [59.154.24.148]) (authenticated sender fredmoreno) by mail13.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id l0TA9liF006537 for ; Mon, 29 Jan 2007 21:09:56 +1100 From: "Fred Moreno" X-Original-To: "Lancair Mail" Subject: Question: hydraulic fluid versus ATF X-Original-Date: Mon, 29 Jan 2007 19:10:39 +0900 X-Original-Message-ID: <010501c7438d$c0b64950$c211140a@fred> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0106_01C743D9.309DF150" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6822 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 Importance: Normal Thread-Index: AcdDjblmzg4YfBUbReS6oUq1jfnZDw== This is a multi-part message in MIME format. ------=_NextPart_000_0106_01C743D9.309DF150 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable I appeal to the collective wisdom of the assembled experts.=20 =20 At the local SAAA (EAA-equivalent) chapter meeting, I learned that the locals generally use Automatic Transmission Fluid (ATF) instead of = aircraft hydraulic fluid for brake systems and hydraulic systems. The arguments = in favor of ATF are: =20 1) It is locally available while aircraft hydraulic fluid has to be shipped in from Perth at great expense, 2) It is cheap. 3) In many respects it may well be better since automotive fluid and lubrication standards continue to advance while aircraft standards stand still. 4) It may well have better lubricity for pumps and such. 5) It is adequate for our mild weather conditions, that is, it never gets below freezing around here. =20 6) For my aspirated Lancair, maximum flight will likely be = 14,000-16,000 and it will not be cold enough to cause a problem. 7) And if it does get cold up there, it will be no colder than = Wisconsin in January where automobiles still operate with very cold automatic transmissions.=20 =20 The only question is compatibility with seals in pump, cylinders, etc. = So far the locals have seen no compatibility problems. =20 So I ask - what to you think? =20 =20 To ATF or not to ATF, that is the question.. =20 Fred Moreno AKA Captain Tuna, Chicken of the Skies ------=_NextPart_000_0106_01C743D9.309DF150 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

I appeal to the collective wisdom of the = assembled experts.

 

At the local SAAA (EAA-equivalent) chapter = meeting, I learned that the locals generally use Automatic Transmission Fluid (ATF) instead of aircraft hydraulic fluid for brake systems and hydraulic systems.  The arguments in favor of ATF are:

 

1)     It is locally available while aircraft hydraulic fluid has to be = shipped in from Perth at great expense,

2)     It is cheap.

3)     In many respects it may well be better since automotive fluid and lubrication standards continue to advance while aircraft standards stand = still.

4)     It may well have better lubricity for pumps and = such.

5)     It is adequate for our mild weather conditions, that is, it never = gets below freezing around here. 

6)     For my aspirated Lancair, maximum flight will likely be = 14,000-16,000 and it will not be cold enough to cause a problem.

7)     And if it does get cold up there, it will be no colder than = Wisconsin in January = where automobiles still operate with very cold automatic transmissions.

 

The only question is compatibility with seals = in pump, cylinders, etc.   So far the locals have seen no = compatibility problems.

 

So I ask – what to you think?  =

 

To ATF or not to ATF, that is the = question….

 

Fred Moreno AKA

Captain Tuna, Chicken of the = Skies

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