Best Oxygen Setup?

You smoke while using pure oxygen??? This must be a joke.

On Wednesday, 2 October 2019 07:59:10 UTC+10, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
You smoke while using pure oxygen??? This must be a joke.

I guess he must synchronise the puffs from the cannula and the puffs from the cigarette.

Paul

Many moons ago when I was a junior hospital doctor in a chest ward the preferred oxygen mask for low concentration O2 was the "Edinburgh mask" which had a circular hole in the front with the O2 nozzle entering at its lower circumference. Some of the chest patients loved it because they could smoke through the hole. As was demonstrated to me by a marginally less junior doctor, if you held the lit cig tip directly in the O2 outlet flow it just glowed brighter. Oxygen doesn't burn, it burns.

You are correct.Â* Oxygen doesn't burn.Â* But it really supports combustion!

When I was in AF flight school (early 70s, so everyone smoked), they
warned us about smoking with a mask dangling along side one's face.
Seems one fighter jock had his mask catch fire (maybe while lighting up,
maybe due to a cabin depressurization causing the O2 system to go into
pressure mode, who knows?).Â* The point was that he suffered serious
burns to his face.

Personally I never felt the need to smoke during a 2-hour flight with a
pressure demand mask and regulator.

On 10/2/2019 12:09 AM, wrote:
Many moons ago when I was a junior hospital doctor in a chest ward the preferred oxygen mask for low concentration O2 was the "Edinburgh mask" which had a circular hole in the front with the O2 nozzle entering at its lower circumference. Some of the chest patients loved it because they could smoke through the hole. As was demonstrated to me by a marginally less junior doctor, if you held the lit cig tip directly in the O2 outlet flow it just glowed brighter. Oxygen doesn't burn, it burns.

--
Dan, 5J

On Wednesday, October 2, 2019 at 4:38:10 PM UTC+1, Dan Marotta wrote:
You are correct.Â* Oxygen doesn't burn.Â* But it really supports combustion!

When I was in AF flight school (early 70s, so everyone smoked), they
warned us about smoking with a mask dangling along side one's face.
Seems one fighter jock had his mask catch fire (maybe while lighting up,
maybe due to a cabin depressurization causing the O2 system to go into
pressure mode, who knows?).Â* The point was that he suffered serious
burns to his face.

Personally I never felt the need to smoke during a 2-hour flight with a
pressure demand mask and regulator.



An oxygen mask that combusts on exposure to oxygen would be a bit of a design flaw! There will have been something else that ignited before the mask. In the context of medical or general aviation oxygen use I would be far more concerned about oxygen exposure to petroleum based products (e.g. vaseline, Vicks, Chapstick on the face) than smoking

https://www.thoughtco.com/flammability-of-oxygen-608783

As I said in my original post:Â* The pilot was either lighting up or the
regulator gave a blast of oxygen, maybe while he was taking a drag.Â* The
mask did not combust spontaneously and I never said such.

If I had to guess, I'd say he was lighting up and, just after removing
the mask, there would be pure oxygen within the mask.Â* It would be easy
to light.

On 10/2/2019 10:17 AM, wrote:
On Wednesday, October 2, 2019 at 4:38:10 PM UTC+1, Dan Marotta wrote:
You are correct.Â* Oxygen doesn't burn.Â* But it really supports combustion!

When I was in AF flight school (early 70s, so everyone smoked), they
warned us about smoking with a mask dangling along side one's face.
Seems one fighter jock had his mask catch fire (maybe while lighting up,
maybe due to a cabin depressurization causing the O2 system to go into
pressure mode, who knows?).Â* The point was that he suffered serious
burns to his face.

Personally I never felt the need to smoke during a 2-hour flight with a
pressure demand mask and regulator.


An oxygen mask that combusts on exposure to oxygen would be a bit of a design flaw! There will have been something else that ignited before the mask. In the context of medical or general aviation oxygen use I would be far more concerned about oxygen exposure to petroleum based products (e.g. vaseline, Vicks, Chapstick on the face) than smoking

https://www.thoughtco.com/flammability-of-oxygen-608783

--
Dan, 5J

On Wednesday, October 2, 2019 at 9:38:10 AM UTC-6, Dan Marotta wrote:
You are correct.Â* Oxygen doesn't burn.Â* But it really supports combustion!

When I was in AF flight school (early 70s, so everyone smoked), they
warned us about smoking with a mask dangling along side one's face.
Seems one fighter jock had his mask catch fire (maybe while lighting up,
maybe due to a cabin depressurization causing the O2 system to go into
pressure mode, who knows?).Â* The point was that he suffered serious
burns to his face.

Personally I never felt the need to smoke during a 2-hour flight with a
pressure demand mask and regulator.

On 10/2/2019 12:09 AM, wrote:
Many moons ago when I was a junior hospital doctor in a chest ward the preferred oxygen mask for low concentration O2 was the "Edinburgh mask" which had a circular hole in the front with the O2 nozzle entering at its lower circumference. Some of the chest patients loved it because they could smoke through the hole. As was demonstrated to me by a marginally less junior doctor, if you held the lit cig tip directly in the O2 outlet flow it just glowed brighter. Oxygen doesn't burn, it burns.

--
Dan, 5J

I've seen this twice in my career so far. Both times the person was smoking while oxygen was being administered through a nasal cannula. In one case, the cigarette actually exploded, sending the person the the ICU burn ward with 3rd degree burns to the face. NOT PRETTY!!!

The oxygen causes accelerated combustion of the tobacco, resulting in a flash of flame that can cause serious injury. I imagine this happens while they are taking a drag, and not just having it passively smolder in the presence of higher oxygen concentration though.

On Wednesday, October 2, 2019 at 11:59:20 PM UTC-7, John Foster wrote:
On Wednesday, October 2, 2019 at 9:38:10 AM UTC-6, Dan Marotta wrote:
You are correct.Â* Oxygen doesn't burn.Â* But it really supports combustion!

When I was in AF flight school (early 70s, so everyone smoked), they
warned us about smoking with a mask dangling along side one's face.
Seems one fighter jock had his mask catch fire (maybe while lighting up,
maybe due to a cabin depressurization causing the O2 system to go into
pressure mode, who knows?).Â* The point was that he suffered serious
burns to his face.

Personally I never felt the need to smoke during a 2-hour flight with a
pressure demand mask and regulator.

On 10/2/2019 12:09 AM, wrote:
Many moons ago when I was a junior hospital doctor in a chest ward the preferred oxygen mask for low concentration O2 was the "Edinburgh mask" which had a circular hole in the front with the O2 nozzle entering at its lower circumference. Some of the chest patients loved it because they could smoke through the hole. As was demonstrated to me by a marginally less junior doctor, if you held the lit cig tip directly in the O2 outlet flow it just glowed brighter. Oxygen doesn't burn, it burns.

--
Dan, 5J

I've seen this twice in my career so far. Both times the person was smoking while oxygen was being administered through a nasal cannula. In one case, the cigarette actually exploded, sending the person the the ICU burn ward with 3rd degree burns to the face. NOT PRETTY!!!

The oxygen causes accelerated combustion of the tobacco, resulting in a flash of flame that can cause serious injury. I imagine this happens while they are taking a drag, and not just having it passively smolder in the presence of higher oxygen concentration though.

Natural selection at work.

At 15:20 03 October 2019, Jonathan St. Cloud wrote:
On Wednesday, October 2, 2019 at 11:59:20 PM UTC-7, John
Foster wrote:
On Wednesday, October 2, 2019 at 9:38:10 AM UTC-6, Dan
Marotta wrote:
You are correct.=C2=A0 Oxygen doesn't burn.=C2=A0 But it
really
support=
s combustion!
=20
When I was in AF flight school (early 70s, so everyone
smoked), they=20
warned us about smoking with a mask dangling along side
one's face.=20
Seems one fighter jock had his mask catch fire (maybe while
lighting
up=
,=20
maybe due to a cabin depressurization causing the O2 system
to go into=
=20
pressure mode, who knows?).=C2=A0 The point was that he
suffered
seriou=
s=20
burns to his face.
=20
Personally I never felt the need to smoke during a 2-hour
flight with
a=
=20
pressure demand mask and regulator.
=20
On 10/2/2019 12:09 AM, wrote:
Many moons ago when I was a junior hospital doctor in a
chest ward
th=
e preferred oxygen mask for low concentration O2 was the
"Edinburgh mask"
w=
hich had a circular hole in the front with the O2 nozzle entering at
its
lo=
wer circumference. Some of the chest patients loved it because
they could
=
smoke through the hole. As was demonstrated to me by a
marginally less
jun=
ior doctor, if you held the lit cig tip directly in the O2 outlet flow it
j=
ust glowed brighter. Oxygen doesn't burn, it burns.
=20
--=20
Dan, 5J
=20
I've seen this twice in my career so far. Both times the person
was
smok=
ing while oxygen was being administered through a nasal cannula.
In one
ca=
se, the cigarette actually exploded, sending the person the the
ICU burn
wa=
rd with 3rd degree burns to the face. NOT PRETTY!!!
=20
The oxygen causes accelerated combustion of the tobacco,
resulting in a
f=
lash of flame that can cause serious injury. I imagine this
happens while
=
they are taking a drag, and not just having it passively smolder in
the
pre=
sence of higher oxygen concentration though.

Natural selection at work. =20


I have been using a Dive type cylinder because they are easier to
get re filled.
Last Saturday I was flying with the bottle on but the regulator off
above a ridge trying to connect to the wave system.
About 1 hour in and 2700ft asl there was a loud pop and bottle
pressure O2 started blowing into the cockpit .
I could not turn the bottle off so I opened the DV window put a
Pan call out and got it back on the glider field in about 3 minuets .
I have never been so scared ,and I have loads of field landings and
thousands of hours in gliders.
I blame it on lack of maintenance and use, the cylinders has been
sitting in the glider since March turned off while I flew thermals in
the UK.
My bad just need the bottle re-filling and probably a new O ring.

On 10/1/19 3:59 PM, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
You smoke while using pure oxygen??? This must be a joke.



Proves once again Darwinism isn't perfect.