Saftey of exposed wheel at 41,000 feet

Hello,

How safe is Eclipse Aviaion's decision to expose the wheel on jet that
cruises at 41,000 feet?

Has this been done before? On what airplane?

In article , stephen
wrote:

Hello,

How safe is Eclipse Aviaion's decision to expose the wheel on jet that
cruises at 41,000 feet?
Has this been done before? On what airplane?

What difference does it make how high the airplane flies?
The Cessna Citation has had exposed wheels since it was developed in
the late 60's/early 70's.

On Sat, 06 Dec 2003 02:31:24 GMT, EDR wrote:

In article , stephen
wrote:

Hello,

How safe is Eclipse Aviaion's decision to expose the wheel on jet that
cruises at 41,000 feet?
Has this been done before? On what airplane?

What difference does it make how high the airplane flies?
The Cessna Citation has had exposed wheels since it was developed in
the late 60's/early 70's.

I think he's asking about either excess tire pressure bursting the
tire or the tire expanding and getting stuck in the wheel well.

Some sort of variation on the question comes up a couple to times a
year here. The answer is usually that no, the maximum pressure
differential is about 15 psi, which is trivial for a tire.

Don

"stephen" wrote in message
m...
Hello,

How safe is Eclipse Aviaion's decision to expose the wheel on jet that
cruises at 41,000 feet?

Has this been done before? On what airplane?

Cessna Citation's have half open wheel bays. They cruise FL410 and up.

"Don Tuite" wrote in message
...
On Sat, 06 Dec 2003 02:31:24 GMT, EDR wrote:

In article , stephen
wrote:

Hello,

How safe is Eclipse Aviaion's decision to expose the wheel on jet that
cruises at 41,000 feet?
Has this been done before? On what airplane?

What difference does it make how high the airplane flies?
The Cessna Citation has had exposed wheels since it was developed in
the late 60's/early 70's.

I think he's asking about either excess tire pressure bursting the
tire or the tire expanding and getting stuck in the wheel well.

Some sort of variation on the question comes up a couple to times a
year here. The answer is usually that no, the maximum pressure
differential is about 15 psi, which is trivial for a tire.

Sorry, but the tires on a Citation are inflated to 120 +/- PSI on the nose
wheel and 98 PSI on the mains. They are filled with dry nitrogen.

In a previous article, "Tom" said:
Some sort of variation on the question comes up a couple to times a
year here. The answer is usually that no, the maximum pressure
differential is about 15 psi, which is trivial for a tire.

Sorry, but the tires on a Citation are inflated to 120 +/- PSI on the nose
wheel and 98 PSI on the mains. They are filled with dry nitrogen.

Yes, and at sea level it's pushing against 15 psi, and in vacuum they're
pushing against nothing, which means the maximum pressure differential
between ground and cruise is 15 psi.


--
Paul Tomblin http://xcski.com/blogs/pt/
"We choose to go to the moon in this decade and do the other things, not
because they are easy, but because they are hard...." - John F Kennedy

"Paul Tomblin" wrote in message
...
In a previous article, "Tom" said:
Some sort of variation on the question comes up a couple to times a
year here. The answer is usually that no, the maximum pressure
differential is about 15 psi, which is trivial for a tire.

Sorry, but the tires on a Citation are inflated to 120 +/- PSI on the
nose
wheel and 98 PSI on the mains. They are filled with dry nitrogen.

Yes, and at sea level it's pushing against 15 psi, and in vacuum they're
pushing against nothing, which means the maximum pressure differential
between ground and cruise is 15 psi.

Your math doesn't add up (how cliche' )

"Paul Tomblin" wrote in message
...
In a previous article, "Tom" said:
Some sort of variation on the question comes up a couple to times a
year here. The answer is usually that no, the maximum pressure
differential is about 15 psi, which is trivial for a tire.

Sorry, but the tires on a Citation are inflated to 120 +/- PSI on the
nose
wheel and 98 PSI on the mains. They are filled with dry nitrogen.

Yes, and at sea level it's pushing against 15 psi, and in vacuum they're
pushing against nothing, which means the maximum pressure differential
between ground and cruise is 15 psi.

I believe he's talking about the differential between the air in the tires
and the outside air.

differential is about 15 psi, which is trivial for a tire.

Sorry, but the tires on a Citation are inflated to 120 +/- PSI on the nose
wheel and 98 PSI on the mains.

Apparently, another "sorry" would be in order. What he's saying is that the
difference between sea level and outer space is only around 15psi, which is
PROBABLY an almost insignificant fraction of the pressure usually existing
inside a properly inflated tire. Besides, it doesn't make any difference if the
wheel is behind a wheel well door if it is still not in the pressure vessel of
the fuselage.

An extrapolation of this discussion: the tires on the Space Shuttles. To the
best of my knowledge, they stay inflated the whole time, even in near zero
pressure on orbit.

David Sproul, Bethesda, MD

"stephen" wrote in message
m...

How safe is Eclipse Aviaion's decision to expose the wheel on jet that
cruises at 41,000 feet?


Perfectly safe. What is your concern?