X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 28 Nov 2008 15:25:02 -0500 Message-ID: X-Original-Return-Path: Received: from [65.121.222.243] (HELO agcsrvr.AGCEngineering.com) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3319422 for lml@lancaironline.net; Thu, 27 Nov 2008 00:56:47 -0500 Received-SPF: none receiver=logan.com; client-ip=65.121.222.243; envelope-from=JohnB@agcheattransfer.com X-Ninja-PIM: Scanned by Ninja X-Ninja-AttachmentFiltering: (no action) Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C95054.FC571E14" Subject: RE: [LML] Re: 360s at high altitudes X-MimeOLE: Produced By Microsoft Exchange V6.5 X-Original-Date: Thu, 27 Nov 2008 00:56:05 -0500 X-Original-Message-ID: <21105FE689C16E45BFCD702D4D921DCA0BD130@agcsrvr.AGCEngineering.com> In-Reply-To: Thread-Topic: [LML] Re: 360s at high altitudes thread-index: AclQI6GGjEEgeiYmRlKth5Jn+Y8IwAAMO4tw References: From: "John C. Bohn" X-Original-To: "Lancair Mailing List" This is a multi-part message in MIME format. ------_=_NextPart_001_01C95054.FC571E14 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Regarding welders Ox vs. Medical Ox...they are the same....20+ years ago they weren't.... =20 John C. Bohn Direct (Cell)- 503-887-2933 Western Factory- 503-774-7342 Eastern Factory- 703-257-1660 =20 See us on the Web at www.AGCHeattransfer.com ________________________________ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Robert Mitchell Sent: Wednesday, November 26, 2008 6:02 PM To: lml@lancaironline.net Subject: [LML] Re: 360s at high altitudes =20 Hi Stuart, =20 I've used welder's oxygen in the past also. It does cost about $10.00= a fill vs. aviation oxygen @ $80.00 for my last fill. But, don't do it, welder's oxygen contains too much water, and other impurities. It will freeze at high altitudes, more importantly it can corrode the regulator and gauge and will void any warranty.=20 =20 Pulse oximetry is a nice cross check at high altitudes but should not= be relied upon for various reasons, a prime one being that a little hyperventilation will artificially raise the oxygen saturation curve, giving a false sense of security. =20 =20 Bob Mitchell L-320 Senior AME =20 ________________________________ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Stuart Seffern Sent: Monday, November 24, 2008 10:01 PM To: lml@lancaironline.net Subject: [LML] Re: 360s at high altitudes =20 I use a Standard welding Oxygen bottle which can be exchanged anywhere in the US for less than $10 and a nose cannula in a O-360. Don't necessarily try this yourself. I've taken AF high altitude training twice at Wright Patterson and know well my personal limits. At 22,000, for just under 1 hour over the Rockies heading east with a 80 knot tailwind wearing a pulse oxcimeter on my finger I was above the nasty turbulence and bad WX singing my semi-hypoxic rendition of Stormy Weather and getting a suntan in smooth air. O2 stats never dropped below 90%. I saw fuel economy rates as high as 47 MPG! Lancairs are amazing airplanes.... =20 =20 ------_=_NextPart_001_01C95054.FC571E14 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Regarding welders Ox vs. Medical= Ox…they are the same….20+ years ago they weren’t….<= /span>

 

John C. Bohn

Direct (Cell)- 503-887-2933

Western Factory- 503-774-7342

Eastern Factory- 703-257-1660

 

See us on the Web at www.AGCHeattransfer.com

From: Lancair Mailing List [mailto:lml@lancaironl= ine.net] On Behalf Of Robert Mitchell
Sent: Wednesday, November= 26, 2008 6:02 PM
To: lml@lancaironline.net=
Subject: [LML] Re: 360s= at high altitudes

 

Hi Stuart,<= /o:p>

 

I’ve used welder’s oxygen in the past also.  It does cost about $10.00= a fill vs. aviation oxygen @ $80.00 for my last fill.  But, don’t= do it, welder’s oxygen contains too much water, and other impurities.&nbs= p; It will freeze at high altitudes, more importantly it can corrode the regul= ator and gauge and will void any warranty.

 

Pulse oximetry= is a nice cross check at high altitudes but should not be relied upon for various reasons, a prime one being that a little hyperventilation will artificia= lly raise the oxygen saturation curve, giving a false sense of security.&nbs= p;

 

Bob Mitchell

L-320=

Senior AME<= /o:p>

 

From: Lancair Mailing List [mailto:lml@lancaironl= ine.net] On Behalf Of Stuart Seffern
Sent: Monday, November= 24, 2008 10:01 PM
To: lml@lancaironline.net=
Subject: [LML] Re: 360s= at high altitudes

 

I use a Standard welding Oxygen bottle which can be exchanged anywhere in= the US for less than $10 and a nose cannula in a  O-360.  Don’t nec= essarily try this yourself.   I’ve taken AF high altitude trainin= g twice at Wright Patterson and know well my personal limits.  At 22,000,= for just under 1 hour over the Rockies heading east with a 80 knot tailwind weari= ng a pulse oxcimeter on my finger I was above the nasty turbulence and bad= WX singing my semi-hypoxic rendition of Stormy Weather and getting a suntan= in smooth air.  O2 stats never dropped below 90%.  I saw fuel eco= nomy rates as high as 47 MPG!

Lancairs are amazing airplanes….

 

 

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