Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b2) with ESMTP id 3189726 for flyrotary@lancaironline.net; Sun, 25 Apr 2004 12:02:34 -0400 Received: from EDWARD (clt25-78-058.carolina.rr.com [24.25.78.58]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i3PG2WSn022903 for ; Sun, 25 Apr 2004 12:02:33 -0400 (EDT) Message-ID: <000801c42ade$bb8d6a50$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: FW: Sad story Date: Sun, 25 Apr 2004 12:02:38 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0005_01C42ABD.344047F0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0005_01C42ABD.344047F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Re: FW: Sad story----- Original Message -----=20 From: Al Gietzen=20 To: Rotary motors in aircraft=20 Sent: Sunday, April 25, 2004 11:37 AM Subject: [FlyRotary] Re: FW: Sad story On 4/24/04 7:53 PM, "Tracy Crook" wrote: It's possible I misunderstood the explanation but the theory of why = this happened seems unlikely. The sudden expansion of coolant would = have to be incredibly fast to cause an overpressure due to not being = able to get out through the overflow tube fast enough.=20 =20 Tracy =20 I just learned it was a =BC" line; i.d about 1/8". Trying to squirt a = pint or more through that in; what; less than a minute? That could do = it. I currently have a =BC" line on mine as an overflow from the = pressure bottle. The pressure would release from the cap (through the = upper gasket) but I would lose coolant in a similar scenario. I'm going = to rework that to a 3/8". That will give 4 times the flow area. Al I guess its still not clear to me how that situation would cause a = line to blow off. The max coolant pressure I have seen was around 24 = psi and that should not cause a line to blow off unless it was = inadequately clamped or some other defect. Hard to believe the pressure = increase due to the heat build up would be that fast. But, a larger = flow area should indeed relieve the pressure build up. Ed ------=_NextPart_000_0005_01C42ABD.344047F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Re: FW: Sad story
----- Original Message = -----
From:=20 Al = Gietzen=20
Sent: Sunday, April 25, 2004 = 11:37=20 AM
Subject: [FlyRotary] Re: FW: = Sad=20 story

 

On=20 4/24/04 7:53=20 PM, "Tracy Crook" <lors01@msn.com>=20 wrote:


 It's = possible I=20 misunderstood the explanation but the theory of why this happened = seems=20 unlikely.  The sudden expansion of coolant would have to be = incredibly=20 fast to cause an overpressure due to not being able to get out through = the=20 overflow tube fast enough.
 
Tracy

 

I just = learned it=20 was a =BC=94 line; i.d about 1/8=94.  Trying to squirt a pint or = more through=20 that in; what; less than a minute? That could do it.  I currently = have a=20 =BC=94 line on mine as an overflow from the pressure bottle.  The = pressure=20 would release from the cap (through the upper gasket) but I would lose = coolant=20 in a similar scenario.  I=92m going to rework that to a = 3/8=94.  That=20 will give 4 times the flow area.

 

Al

 

 

I guess its still not clear to me how that=20 situation would cause a line to blow off.  The max coolant = pressure=20 I have seen was around 24 psi and that should not cause a line to blow = off=20 unless it was inadequately clamped or some other defect.  Hard to = believe=20 the pressure increase due to the heat build up would be that = fast.  But,=20 a larger flow area should indeed relieve the pressure build=20 up.

 

Ed

 

 

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