X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 5.0.2) with ESMTP id 854026 for flyrotary@lancaironline.net; Thu, 01 Dec 2005 23:11:22 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-025-165.carolina.res.rr.com [24.74.25.165]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id jB24AYfU012970 for ; Thu, 1 Dec 2005 23:10:34 -0500 (EST) Message-ID: <000701c5f6f6$4edab170$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Brake fluid flash point Date: Thu, 1 Dec 2005 23:10:18 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01C5F6CC.65B63B50" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0004_01C5F6CC.65B63B50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageHi Bob, Chemistry was not my big point in studies, so I have no doubt that you = are correct But, all the literature I have read on the two different = formulas for aircraft brake fluid appears to make a point that the fluid = with the higher flash point requires more energy (heat?) to ignite it. = Less prone to ignition? In fact, the military is the one who specified = the new brake fluid with a higher flash point due to the combination of = military operations and downside of a flammable brake/hydraulic fluid.=20 So am I wrong in assuming that a fluid with twice is high a flash point = as a similar fluid requires more heat to ignite it?? Ed A ----- Original Message -----=20 From: Bob Darrah=20 To: Rotary motors in aircraft=20 Sent: Thursday, December 01, 2005 10:46 PM Subject: [FlyRotary] Brake fluid flash point Ed, Me thinks that maybe you have a misunderstanding of the term "flash = point". It is not what most people assume it is. I say this because = the flash point of the gas in your tank is something like 60 degrees = BELOW 0. That means that on a hot day, the temperature could exceed the = flash point by 160 degrees and you don't see too many people concerned = about that. Bob Darrah ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Thursday, December 01, 2005 7:43 PM Subject: [FlyRotary] Re: fuel/brake lines Rusty, I went with the new high flash point aircraft brake fluid = (MIL-H-83282)- flash point is 450F vs 240F for the old stuff. I had to = get a gallon of the stuff (enough to probably last me for years and = years and years), but after the fire, I feel a bit more comfortable that = it won't go up with the temp a little over the boiling point of water. = I considered some of the auto brake fluids - but have heard some horror = stories about incompatibility with aircraft seals - I know there is some = DOT formulas that supposedly are compatible - but did not feel like = experimenting {:>) Ed ------=_NextPart_000_0004_01C5F6CC.65B63B50 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Hi Bob,
 
Chemistry was not my big point in studies, so I = have no=20 doubt that you are correct   But,   all the literature I = have=20 read on the two different formulas for aircraft brake fluid appears to = make a=20 point that the fluid with the higher flash point requires more energy = (heat?) to=20 ignite it. Less prone to ignition?   In fact, the = military is the=20 one who specified the new brake fluid with a higher flash = point=20 due to the combination of military operations and downside of a=20  flammable brake/hydraulic fluid.
 
So am I wrong in assuming that a fluid with = twice is high=20 a flash point as a similar fluid requires more heat to ignite = it??
 
Ed A
----- Original Message -----
From:=20 Bob=20 Darrah
Sent: Thursday, December 01, = 2005 10:46=20 PM
Subject: [FlyRotary] Brake = fluid flash=20 point

Ed,
 
Me thinks that maybe you have a misunderstanding = of the term=20 "flash point".  It is not what most people assume it is.  I = say this=20 because the flash point of the gas in your tank is something like 60 = degrees=20 BELOW 0.  That means that on a hot day, the temperature could = exceed the=20 flash point by 160 degrees and you don't see too many people concerned = about=20 that.
 
Bob Darrah
----- Original Message -----
From:=20 Ed Anderson
To: Rotary motors in = aircraft=20
Sent: Thursday, December 01, = 2005 7:43=20 PM
Subject: [FlyRotary] Re: = fuel/brake=20 lines

Rusty,
 
I went with the new high flash point = aircraft brake=20 fluid (MIL-H-83282)- flash point is 450F vs = 240F for the=20 old stuff.   I had to get a gallon of the stuff (enough to = probably last me for years and years and years), but after the fire, = I feel=20 a bit more comfortable that it won't go up with the temp a little = over the=20 boiling point of water.  I considered some of the auto brake = fluids -=20 but have heard some horror stories about incompatibility with = aircraft seals=20 - I know there is some DOT formulas that supposedly are compatible - = but did=20 not feel like experimenting {:>)
 
Ed
 
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