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 [64.12.143.99] (HELO imo-m11.mail.aol.com) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3319241 for lml@lancaironline.net; Wed, 26 Nov 2008 20:50:01 -0500 Received: from Sky2high@aol.com by imo-m11.mx.aol.com (mail_out_v39.1.) id q.d38.3aeef434 (39332) for ; Wed, 26 Nov 2008 20:49:58 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Wed, 26 Nov 2008 20:49:58 EST Subject: Re: [LML] Re: 360s at high altitudes X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1227750598" X-Mailer: AOL 9.1 sub 5000 X-Spam-Flag:NO -------------------------------1227750598 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en Bob, =20 I would like to see the proof that welder's O2 is any less viable than that=20= =20 available from the local FBO. BTW, my cockpit located O2 bottle will not fal= l =20 below freezing while I'm inside. OK, I do keep my plane in a heated hangar= .=20 If there was water in welders O2, their regulator would also corrode, mess= =20 up the regulator and probably screw up the weld job, too. =20 Pulse Oximeters are worth your life. Creeping hypoxia may not be =20 self-recognizable. The reading are reliable enough to set your own danger =20= limit. Mine=20 reads 96% at 700 MSL and it is not allowed to go below 89% in flight. =20 Sensitivity to O2 absorption varies with age, weight, sleep, Density altitu= de,=20 etc. and may vary from day to day. =20 Recently, there was an article written about how deep breathing can indee= d=20 keep your O2 saturation level up - but, it required conscious effort and th= e=20 saturation level dropped rapidly when the deep breathing ceased.. =20 =20 BTW, CO will also raise the reading of an Oximeter. There should be a =20 digital CO detector in the cockpit, too. =20 =20 Scott Krueger AKA Grayhawk LNC2 N92EX IO 320 SB 89/96 In a message dated 11/26/2008 6:22:53 P.M. Central Standard Time, =20 rmitch1@hughes.net writes: =20 Hi Stuart,=20 I=E2=80=99ve used welder=E2=80=99s oxygen in the past also. It does cost a= bout $10.00 a=20 fill vs. aviation oxygen @ $80.00 for my last fill. But, don=E2=80=99t do=20= it, welder=E2=80=99 s oxygen contains too much water, and other impurities. It will freeze at=20 high altitudes, more importantly it can corrode the regulator and gauge and= =20 will void any warranty. =20 Pulse oximetry is a nice cross check at high altitudes but should not be=20 relied upon for various reasons, a prime one being that a little=20 hyperventilation will artificially raise the oxygen saturation curve, givin= g a false sense=20 of security. =20 Bob Mitchell=20 L-320=20 Senior AME=20 =20 =20 ____________________________________ =20 From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of =20 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=20 the US for less than $10 and a nose cannula in a O-360. Don=E2=80=99t ne= cessarily=20 try this yourself. I=E2=80=99ve taken AF high altitude training twice at W= right=20 Patterson and know well my personal limits. At 22,000, for just under 1 ho= ur over=20 the Rockies heading east with a 80 knot tailwind wearing a pulse oxcimeter=20= on=20 my finger I was above the nasty turbulence and bad WX singing my=20 semi-hypoxic rendition of Stormy Weather and getting a suntan in smooth air= . O2 stats =20 never dropped below 90%. I saw fuel economy rates as high as 47 MPG!=20 Lancairs are amazing airplanes=E2=80=A6.=20 **************Life should be easier. So should your homepage. Try the NEW=20 AOL.com.=20 (http://www.aol.com/?optin=3Dnew-dp&icid=3Daolcom40vanity&ncid=3Demlcntaolco= m00000002) -------------------------------1227750598 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en
Bob,
 
I would like to see the proof that welder's O2 is any less viable than=20= that=20 available from the local FBO. BTW, my cockpit located O2 bottle will not fal= l=20 below freezing while I'm inside.  OK, I do keep my plane in a heated=20 hangar.  If there was water in welders O2, their regulator would also=20 corrode, mess up the regulator and probably screw up the weld job, too.
 
Pulse Oximeters are worth your life.  Creeping hypoxia may not be=20 self-recognizable.  The reading are reliable enough to set your own dan= ger=20 limit.  Mine reads 96% at 700 MSL and it is not allowed to go below 89%= in=20 flight.  Sensitivity to O2 absorption varies with age, weight, sleep,=20 Density altitude, etc. and may vary from day to day.
 
  Recently, there was an article written about how deep breathing=20= can=20 indeed keep your O2 saturation level up - but, it required conscious effort=20= and=20 the saturation level dropped rapidly when the deep breathing ceased.. =20
 
BTW, CO will also raise the reading of an Oximeter.  There should=20= be a=20 digital CO detector in the cockpit, too.
 
Scott Krueger=20 AKA Grayhawk
LNC2 N92EX IO 320 SB 89/96

 
In a message dated 11/26/2008 6:22:53 P.M. Central Standard Time,=20 rmitch1@hughes.net writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

Hi=20 Stuart,

 I=E2=80=99ve use= d welder=E2=80=99s=20 oxygen in the past also.  It does cost about $10.00 a fill vs. aviati= on=20 oxygen @ $80.00 for my last fill.  But, don=E2=80=99t do it, welder= =E2=80=99s oxygen=20 contains too much water, and other impurities.  It will freeze at hig= h=20 altitudes, more importantly it can corrode the regulator and gauge and wil= l=20 void any warranty.

Pulse oximetry=20= is a=20 nice cross check at high altitudes but should not be relied upon for vario= us=20 reasons, a prime one being that a little hyperventilation will artificiall= y=20 raise the oxygen saturation curve, giving a false sense of security. = =20

 

Bob=20 Mitchell

L-320

Senior=20 AME

 

From:Lancair Mailing List=20 [mailto:lml@lancaironline.net] On Beh= alf Of=20 Stuart Seffern
Sent: Monday, November 24, 2008 10:= 01=20 PM
To:=20 lml@lancaironline.net
Subject: [LML] Re: 360s at high=20 altitudes

 

I use a St= andard=20 welding Oxygen bottle which can be exchanged anywhere in the=20 US for less than $10 and a no= se=20 cannula in a  O-360.  Don=E2=80=99t necessarily try this yoursel= f. =20  I=E2=80=99ve taken AF high altitude training twice at Wright Patters= on and know=20 well my personal limits.  At 22,000, for just under 1 hour over the=20 Rockies heading east with a 80 knot tailwind wearing a pulse oxcimeter on=20= my=20 finger I was above the nasty turbulence and bad WX singing my semi-hypoxic= =20 rendition of Stormy Weather and getting a suntan in smooth air.  O2 s= tats=20 never dropped below 90%.  I saw fuel economy rates as high as 47=20 MPG!

Lancairs a= re=20 amazing airplanes=E2=80=A6.

 = ;

 = ;

 



Life should be easier. So should your h= omepage. Try the NEW AOL.com.
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