Why nitrogen?

"Morgans" wrote in message
...

"Allen" wrote

Learjets do indeed use bottled oxygen and it is found in the nose bay
area. There is a thin capillary that runs into the cockpit to a pressure
gauge. The pressure gauge displays the pressure in the tank regardless of
whether the valve is turned on or off. The pressure in the tank can read
full on the ground but at low temperature at altitude will read several
hundred pounds less.

They do? For primary breathing air at altitude? Is there no cabin air
pressurization provided by bleed air from the engines?

I'm not doubting your word, just trying to understand. I thought all
bizjets used bleed air to pressurize the cabins.
--
Jim in NC


I am sorry Jim, the O2 is for emergency use. The cabin is pressurized from
engine bleed air. The O2 masks drop from the ceiling at 14K' cabin altitude
just like the airliners.

--

*H. Allen Smith*
WACO - We are all here, because we are not all there.

"Allen" wrote

I am sorry Jim, the O2 is for emergency use. The cabin is pressurized
from engine bleed air. The O2 masks drop from the ceiling at 14K' cabin
altitude just like the airliners.

Yep, that's what I thought.

Sorry you misunderstood me, and I misunderstood you.

This went back to the possibility of oxy causing the Payne Stewart crash,
when I replied it was not likely because that was believed to be a primary
pressurization problem.
--
Jim in NC

"Morgans" wrote in
:


"Allen" wrote

I am sorry Jim, the O2 is for emergency use. The cabin is
pressurized from engine bleed air. The O2 masks drop from the
ceiling at 14K' cabin altitude just like the airliners.

Yep, that's what I thought.

Sorry you misunderstood me, and I misunderstood you.

This went back to the possibility of oxy causing the Payne Stewart
crash, when I replied it was not likely because that was believed to
be a primary pressurization problem.


That isn't what you replied.


Bertie

"Bertie the Bunyip" wrote in message
...
| "Morgans" wrote in
| :
|
|
| "Allen" wrote
|
| I am sorry Jim, the O2 is for emergency use. The cabin is
| pressurized from engine bleed air. The O2 masks drop from the
| ceiling at 14K' cabin altitude just like the airliners.
|
| Yep, that's what I thought.
|
| Sorry you misunderstood me, and I misunderstood you.
|
| This went back to the possibility of oxy causing the Payne Stewart
| crash, when I replied it was not likely because that was believed to
| be a primary pressurization problem.
|
|
| That isn't what you replied.
|
|
| Bertie
|

"Morgans" wrote in message
...

"Allen" wrote

I am sorry Jim, the O2 is for emergency use. The cabin is pressurized
from engine bleed air. The O2 masks drop from the ceiling at 14K' cabin
altitude just like the airliners.

Yep, that's what I thought.

Sorry you misunderstood me, and I misunderstood you.

This went back to the possibility of oxy causing the Payne Stewart crash,
when I replied it was not likely because that was believed to be a primary
pressurization problem.
--
Jim in NC

The Lear does have an emergency pressurization system. When the cabin
altitude reaches (I believe) 12,000' there is a valve that opens and puts
full, uncooled bleed air into the cabin. There is no mistaking when this
happens; it is loud and it is hot.

--

*H. Allen Smith*
WACO - We are all here, because we are not all there.

"Allen" wrote

The Lear does have an emergency pressurization system. When the cabin
altitude reaches (I believe) 12,000' there is a valve that opens and puts
full, uncooled bleed air into the cabin. There is no mistaking when this
happens; it is loud and it is hot.

Yeah, I'll bet that is exciting!

Let's see, death by altitude blackout, or death by cooking like a lobster.
Which would I choose? g

Interesting. I didn't know that. I wonder why the Payne Stewart plane
(Lear 35) did not have that system activate. Perhaps the sensor that
measures cabin altitude was on the fritz. What kind of backup would there
be? It would seem reasonable to have separate sensors for normal
pressurization operation, and one for the emergency system, and perhaps one
for a aural and visual cockpit warning.

Do you know how it is set up?

Thanks for the information.
--
Jim in NC

"Morgans" wrote in
:


"Allen" wrote

The Lear does have an emergency pressurization system. When the
cabin altitude reaches (I believe) 12,000' there is a valve that
opens and puts full, uncooled bleed air into the cabin. There is no
mistaking when this happens; it is loud and it is hot.

Yeah, I'll bet that is exciting!

Let's see, death by altitude blackout, or death by cooking like a
lobster. Which would I choose? g

Interesting. I didn't know that. I wonder why the Payne Stewart
plane (Lear 35) did not have that system activate.

oh brother.


Bertie

"Bertie the Bunyip" wrote in message
...
| "Morgans" wrote in
| :
|
|
| "Allen" wrote
|
| The Lear does have an emergency pressurization system. When the
| cabin altitude reaches (I believe) 12,000' there is a valve that
| opens and puts full, uncooled bleed air into the cabin. There is no
| mistaking when this happens; it is loud and it is hot.
|
| Yeah, I'll bet that is exciting!
|
| Let's see, death by altitude blackout, or death by cooking like a
| lobster. Which would I choose? g
|
| Interesting. I didn't know that. I wonder why the Payne Stewart
| plane (Lear 35) did not have that system activate.
|
| oh brother.
|
|
| Bertie
|

"Mick" @_#`~#@.^net wrote in :


"Bertie the Bunyip" wrote in message
...
| "Morgans" wrote in
| :
|
|
| "Allen" wrote
|
| The Lear does have an emergency pressurization system. When the
| cabin altitude reaches (I believe) 12,000' there is a valve that
| opens and puts full, uncooled bleed air into the cabin. There is no
| mistaking when this happens; it is loud and it is hot.
|
| Yeah, I'll bet that is exciting!
|
| Let's see, death by altitude blackout, or death by cooking like a
| lobster. Which would I choose? g
|
| Interesting. I didn't know that. I wonder why the Payne Stewart
| plane (Lear 35) did not have that system activate.
|
| oh brother.
|
|
| Bertie
|




Oh fjukkktard.


Bertie