Max Q
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Is The V22 Osprey Pressurized?

Sun Nov 16, 2008 10:41 am

Interested to know if this is the case..
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ajd1992
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RE: Is The V22 Osprey Pressurized?

Sun Nov 16, 2008 11:05 am

According to Wiki, the cruise height its FL260.

So in short... yes it is. You couldn't fly that high without being pressurised. Well, not legally anyway (And I don't think you'd want to be on O2 for the whole flight above FL120).
 
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Moose135
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RE: Is The V22 Osprey Pressurized?

Sun Nov 16, 2008 7:12 pm

No, the V-22 is not pressurized. As long as you are on oxygen, you can fly at those altitudes - we used to get up to FL250 in the unpressurized T-37 all the time (well, not all the time, but you know what I mean...) wearing an oxygen mask.
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unattendedbag
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RE: Is The V22 Osprey Pressurized?

Sun Nov 16, 2008 10:04 pm

http://www.fighter-planes.com/info/v22_osprey.htm

"The aircraft was originally designed to be pressurized, but the rotating wing (for shipboard stowage) makes it difficult to properly seal the cabin. As a result, pilots and aircrew must wear oxygen masks while flying above 10,000 feet (3,000 m). The Osprey uses an on-board oxygen generating system (OBOGS) which enriches ambient air by filtering out the oxygen."
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hercppmx
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RE: Is The V22 Osprey Pressurized?

Sun Nov 16, 2008 10:39 pm



Quoting UnattendedBag (Reply 3):
http://www.fighter-planes.com/info/v22_osprey.htm

"The aircraft was originally designed to be pressurized, but the rotating wing (for shipboard stowage) makes it difficult to properly seal the cabin. As a result, pilots and aircrew must wear oxygen masks while flying above 10,000 feet (3,000 m). The Osprey uses an on-board oxygen generating system (OBOGS) which enriches ambient air by filtering out the oxygen."

AFAIK this is correct for the Pilots, how ever for everyone riding in the back of the aircraft they use oxygen bottles.
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Max Q
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RE: Is The V22 Osprey Pressurized?

Sun Nov 16, 2008 11:43 pm

Thanks for the information.
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CTR
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RE: Is The V22 Osprey Pressurized?

Mon Nov 17, 2008 12:19 am



Quoting UnattendedBag (Reply 3):
The aircraft was originally designed to be pressurized, but the rotating wing (for shipboard stowage) makes it difficult to properly seal the cabin.

This site's information is proof that you should never believe everything you see on the web!

The V-22 rotating wing has nothing to do with the fuselage not being pressurized.

It does not take an aerospace engineer to realize that pressurized fuselages have circular cross sections. Ever see a square balloon?

The V-22 has a square cross section like most unpressurized cargo aircraft (ie Cessna Caravan) to maximize internal volume for structural weight. The V-22 has a square unpressurized fuselage because for the missions it was designed for it made the most sense.

Not to mention one bullet in the fuselage is all it takes to prevent pressurisation.

Have fun,

CTR
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Max Q
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RE: Is The V22 Osprey Pressurized?

Mon Nov 17, 2008 5:05 am

You raise some very good points CTR.

I stand to be corrected, but isn't the C130 fuselage pretty 'square' and I'm almost positive the Hercules is pressurized.

I realise, for minimal stress loading the fuselage is best in a circular form (a la 777) but it doesn't have to be.

Even if the pressure hull is penetrated by a bullet, unless there is an accompanying explosion resulting in a big hole, a bullet hole alone would not necessarily result in a pressure loss.

A bullet hole doesn't have to be that big, I've seen bigger leaks around doors and the pressurisation system could handle it.
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CTR
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RE: Is The V22 Osprey Pressurized?

Mon Nov 17, 2008 12:00 pm

Actually the C-130 Herc fuselage is very close to round. While the V-22 fuselage is definitly almost square.

True, if you have a big enough supply of air you can maintain pressure with any size hole. But you would be surprized how much air pressure can be lost through even a small hole. Plus, unlike conventional aircraft, the V-22 cannot use large quantities of engine bleed air to pressureize the fuselage. This is due to the complexity in piping air from the rotating nacelles and the loss of engine power caused by bleed air.

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CTR
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walter2222
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RE: Is The V22 Osprey Pressurized?

Mon Nov 17, 2008 6:26 pm



Quoting Max Q (Reply 7):
but isn't the C130 fuselage pretty 'square' and I'm almost positive the Hercules is pressurized

It is looking pretty "round", as can be seen here:


View Large View Medium
Click here for bigger photo!

Photo © Walter Van Bel



the cargo area looks pretty "square", but you can still distiguish the round shape:


View Large View Medium
Click here for bigger photo!

Photo © Walter Van Bel



Best regards,

Walter
Canon 347d mkII ;-) - EFS10-22mm f/3.5-4.5 USM - EFS18-55mm - EF28-105mm f3.5/4.5 - EF100-400mm f4.5-5.6l IS USM - ...
 
CTR
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RE: Is The V22 Osprey Pressurized?

Tue Nov 18, 2008 1:05 am

[quote=Walter2222,reply=9]the cargo area looks pretty "square", but you can still distiguish the round shape:

If you look carefully at the photo Walter posted you can see that the internal walls are circular both forward and aft of the boxed in square section. These boxed in areas house the main landing gear struts and support structure.

Have fun,

CTR
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Max Q
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RE: Is The V22 Osprey Pressurized?

Tue Nov 18, 2008 5:44 am

Yes, good point there on the cross section, I still maintain, however that just one small bullet hole will not necessarily cause you to depressurise, especially on a C130 with a relatively low cabin differential.

I have seen daylight around large sections of cabin doors on civilian jet transports and all we had was some whistling.

Our high tech cure was to stuff wet paper towels in the gaps..
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rwessel
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RE: Is The V22 Osprey Pressurized?

Tue Nov 18, 2008 8:48 am



Quoting UnattendedBag (Reply 3):
The Osprey uses an on-board oxygen generating system (OBOGS) which enriches ambient air by filtering out the oxygen."

They enrich the ambient air by filtering *out* the oxygen?!  faint 

Remind be to take my own oxygen bottle if I ever get a ride on an Osprey...  Wink
 
Alessandro
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RE: Is The V22 Osprey Pressurized?

Fri Jan 23, 2009 10:24 pm

So is the V-22 deployed in Afghanistan, if so how does it do in the higher altitude ops than in
Al-Anbar in Iraq?
From New Yorqatar to Califarbia...
 
CTR
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RE: Is The V22 Osprey Pressurized?

Sat Jan 24, 2009 3:37 pm



Quoting Alessandro (Reply 13):
So is the V-22 deployed in Afghanistan, if so how does it do in the higher altitude ops than in
Al-Anbar in Iraq?

Osprey not in Afghanistan yet, but sounds like soon....

http://en.epochtimes.com/n2/content/view/10808/

Have fun,

CTR
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unattendedbag
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RE: Is The V22 Osprey Pressurized?

Sat Jan 24, 2009 5:58 pm



Quoting CTR (Reply 6):
This site's information is proof that you should never believe everything you see on the web!

next time I see one, i will ask one of the drivers.  Smile
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dragon6172
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RE: Is The V22 Osprey Pressurized?

Sat Jan 24, 2009 9:34 pm

As I recall the fuselage does maintain a positive pressure differential to keep outside air out, for NBC purposes. I think this gets misquoted and misunderstood quite a bit.
Phrogs Phorever
 
CTR
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RE: Is The V22 Osprey Pressurized?

Sun Jan 25, 2009 1:54 am



Quoting Dragon6172 (Reply 16):
As I recall the fuselage does maintain a positive pressure differential to keep outside air out, for NBC purposes. I think this gets misquoted and misunderstood quite a bit.

NBC protection equipment can be installed as a kit if the mission reqiires. For all other missions the kit stays on the shelf to minimize aircraft weight.

Have fun,

CTR
Aircraft design is just one big compromise,,,
 
unattendedbag
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RE: Is The V22 Osprey Pressurized?

Sun Mar 15, 2009 10:27 pm



Quoting UnattendedBag (Reply 15):
next time I see one, i will ask one of the drivers.

just spoke with one of the crew on board 166733 EM-02. He stated the aircraft (cockpit & fuselage) are not pressurized. At altitude, the crew must use oxygen.
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