X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 26 Nov 2008 19:01:38 -0500 Message-ID: X-Original-Return-Path: Received: from [64.98.42.211] (HELO smtprelay.b.hostedemail.com) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3317312 for lml@lancaironline.net; Tue, 25 Nov 2008 17:32:37 -0500 Received-SPF: none receiver=logan.com; client-ip=64.98.42.211; envelope-from=rmitch1@hughes.net Received: from filter.hostedemail.com (b-bigip1 [10.5.19.254]) by smtprelay03.b.hostedemail.com (Postfix) with SMTP id 664C132C8E85 for ; Tue, 25 Nov 2008 22:32:01 +0000 (UTC) X-SpamScore: 1 X-Spam-Summary: 40,2.5,0,fd25288f7d5c4a99,b411e116ac38a5be,rmitch1@hughes.net,lml@lancaironline.net,RULES_HIT:1:2:10:75:355:379:539:541:542:599:945:947:960:962:966:967:972:973:980:988:989:1021:1029:1155:1160:1189:1221:1260:1308:1309:1313:1314:1345:1359:1436:1437:1515:1516:1517:1521:1575:1588:1589:1592:1594:1685:1691:1712:1730:1776:1792:2194:2196:2197:2198:2199:2200:2201:2202:2525:2528:2551:2553:2559:2563:2682:2685:2693:2740:2857:2859:2894:2902:2917:2933:2937:2939:2942:2945:2947:2951:2954:3022:3027:3353:3585:3586:3622:3636:3653:3742:3855:3865:3866:3867:3868:3869:3870:3871:3872:3874:3876:3877:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4048:4050:4078:4083:4250:4321:4379:4385:5007:6114:6117:6119:6248:6300:7576:7679:7688:7903:8501:8518:8527:8583:8603:8700:8957:9010:9025:9040:9388,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:,MSBL:none,DNSBL:none Received: from SonyVaioSZ (dpc6935104091.direcpc.com [69.35.104.91]) (Authenticated sender: rmitch1@hughes.net) by omf14.b.hostedemail.com (Postfix) with ESMTP for ; Tue, 25 Nov 2008 22:31:55 +0000 (UTC) From: "Robert Mitchell" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: 360s at high altitudes X-Original-Date: Tue, 25 Nov 2008 16:31:44 -0600 X-Original-Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004F_01C94F1B.557F7EE0" X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 Thread-Index: AclOsndVdsupABHURrKlKAEeKDkRvwAmJjSw X-session-marker: 726D6974636831406875676865732E6E6574 This is a multi-part message in MIME format. ------=_NextPart_000_004F_01C94F1B.557F7EE0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Stuart, 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. 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. Bob Mitchell L-320 Senior AME _____ 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 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.. ------=_NextPart_000_004F_01C94F1B.557F7EE0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi = Stuart,

 

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.

 

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.  =

 

Bob = Mitchell

L-320

Senior = AME

 

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

 

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….

 <= /o:p>

 <= /o:p>

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