Mt. Saint Helens

Scientists are now predicting a 70% chance of Mt. Saint Helens erupting and
throwing rocks as far as three miles away. Pilots flying in the area should
steer clear of the crater.

--
Christopher J. Campbell
World Famous Flight Instructor
Port Orchard, WA


If you go around beating the Bush, don't complain if you rile the animals.

that would be one heck of a thermal ride... if it weren't for the rocks...
and "cough cough" the ash..

BT

"C J Campbell" wrote in message
...
Scientists are now predicting a 70% chance of Mt. Saint Helens erupting
and
throwing rocks as far as three miles away. Pilots flying in the area
should
steer clear of the crater.

--
Christopher J. Campbell
World Famous Flight Instructor
Port Orchard, WA


If you go around beating the Bush, don't complain if you rile the animals.

I know if it dose go I will be up taking photos.


"BTIZ" wrote in message
news:fT27d.3595$mS1.2578@fed1read05...
that would be one heck of a thermal ride... if it weren't for the rocks...
and "cough cough" the ash..

BT

"C J Campbell" wrote in message
...
Scientists are now predicting a 70% chance of Mt. Saint Helens erupting
and
throwing rocks as far as three miles away. Pilots flying in the area
should
steer clear of the crater.

--
Christopher J. Campbell
World Famous Flight Instructor
Port Orchard, WA


If you go around beating the Bush, don't complain if you rile the
animals.

NW_PILOT wrote:

I know if it dose go I will be up taking photos.

You can get the best shots from directly overhead.

George Patterson
If a man gets into a fight 3,000 miles away from home, he *had* to have
been looking for it.

"G.R. Patterson III" wrote in message
...


NW_PILOT wrote:

I know if it dose go I will be up taking photos.

You can get the best shots from directly overhead.

Briefly


George Patterson
If a man gets into a fight 3,000 miles away from home, he *had* to
have
been looking for it.

"G.R. Patterson III" wrote:


NW_PILOT wrote:

I know if it dose go I will be up taking photos.

You can get the best shots from directly overhead.

Now *that's* what I call real, he-man killfiling.
--
Dan
C-172RG at BFM

in article fT27d.3595$mS1.2578@fed1read05, BTIZ at
wrote on 9/30/04 7:00 PM:

that would be one heck of a thermal ride... if it weren't for the rocks...
and "cough cough" the ash..

BT

I was thinking about this recently, and I was trying to determine exactly
what the effects would be on a small plane flying into an ash cloud. How
long would it take for the air filter to become completely clogged? And at
that point, assuming the plane had a carburetor, what would be the effect on
the engine? Would the plugs become fouled? Would they fire at all?

I'm a new pilot and relatively ignorant of engine operations, so I'm curious
to hear the answers.

In article ,
Philip Sondericker wrote:

in article fT27d.3595$mS1.2578@fed1read05, BTIZ at
wrote on 9/30/04 7:00 PM:

that would be one heck of a thermal ride... if it weren't for the rocks...
and "cough cough" the ash..

BT

I was thinking about this recently, and I was trying to determine exactly
what the effects would be on a small plane flying into an ash cloud. How
long would it take for the air filter to become completely clogged? And at
that point, assuming the plane had a carburetor, what would be the effect on
the engine? Would the plugs become fouled? Would they fire at all?

I'm a new pilot and relatively ignorant of engine operations, so I'm curious
to hear the answers.



You can count on an early overhaul, at best. During the 1980s, several
turbine aircraft, including a B747, encountered ash clouds in flight.
The ash is so abrasive that it eroded the compressors to the point of
flameout. The B747 descended to ~10000 ft before they got three engines
relit. A C130 had similar problems.

In a piston engine, the alternate air door would probably open, allowing
unfiltered air into the engine. I p-robably wouldn't atop, but the
compression test would be pretty grim.

Orval Fairbairn wrote:

You can count on an early overhaul, at best. During the 1980s, several
turbine aircraft, including a B747, encountered ash clouds in flight.
The ash is so abrasive that it eroded the compressors to the point of
flameout. The B747 descended to ~10000 ft before they got three engines
relit.


June 24, 1982, a British Airways 747 over Java.

The ash cloud also sandblasted the windshield nearly opague.
The flight crew had great difficulty making out the approach and
runway lights to land the aircraft. If the incident had occurred
during daylight hours, they probably would not have been able
to see out at all.

"Orval Fairbairn" wrote in message
news
In article ,
Philip Sondericker wrote:

in article fT27d.3595$mS1.2578@fed1read05, BTIZ at

wrote on 9/30/04 7:00 PM:

that would be one heck of a thermal ride... if it weren't for the
rocks...
and "cough cough" the ash..

BT

I was thinking about this recently, and I was trying to determine
exactly
what the effects would be on a small plane flying into an ash cloud. How
long would it take for the air filter to become completely clogged? And
at
that point, assuming the plane had a carburetor, what would be the
effect on
the engine? Would the plugs become fouled? Would they fire at all?

I'm a new pilot and relatively ignorant of engine operations, so I'm
curious
to hear the answers.



You can count on an early overhaul, at best. During the 1980s, several
turbine aircraft, including a B747, encountered ash clouds in flight.
The ash is so abrasive that it eroded the compressors to the point of
flameout. The B747 descended to ~10000 ft before they got three engines
relit. A C130 had similar problems.

New Zealand-based pilots , especially those close to the central range on N
Island, have to deal with ash from time to time. When I visited in 1997, our
747 was sent from Auckland airport an hour early because Ruapehu was acting
up. Any Kiwis here can comment?

-- David Brooks