Simulated Engine Outs

"Michael" wrote in message
om...
"C J Campbell" wrote
Actually, no we do not all worry about shock cooling. Neither do we all
worry about shock heating. Many highly respected pilots and mechanics
believe that shock cooling and shock heating are myths, at least for
modern
aircraft engines.

First - we do not fly behind modern aircraft engines, at least in
trainers. Those engines are warmed-over 1950's (at best) technology.

Second, maybe those who are not worried about it should be. I know a
Bonanza pilot who didn't worry about it. He would routinely cut the
power way back for a rapid descent. I attempted to get him to stop,
but he just wasn't worried about it. Then he lost a jug on takeoff.
He's more careful now.

How does that relate to shock cooling the engine?


http://www.avweb.com/news/columns/182107-1.html

Dale wrote
But what indicates that his descent procedure led to the cylinder
failure? Maybe he didn't warm the engine enough for takeoff, maybe he
didn't change oil often, perhaps he over-boosted the engine routinely.

He could not overboost since it was not turboed.

I flew with him enough to know that he did not habitually take off
with a cold engine. I also know his mechanic, and thus know that he
did not skimp on maintenance, especially oil changes. But he was
sloppy about the descent procedures.

Do I KNOW that this caused the problem? Not really. But I know two
pilots who lost a jug on takeoff. He was one; the other flew a
jumpship owned by a non-pilot non-mechanic.

Michael

"Michael" wrote in message m...

Do I KNOW that this caused the problem? Not really. But I know two
pilots who lost a jug on takeoff. He was one; the other flew a
jumpship owned by a non-pilot non-mechanic.

I had a valve break and trash the hell out of the #6 cyl. It was the third flight
of the day (I was doing Young Eagles rides).

In article ,
(Michael) wrote:


He could not overboost since it was not turboed.

Hmm. Try leaving the throttle in and pulling the prop back.

Do I KNOW that this caused the problem? Not really. But I know two
pilots who lost a jug on takeoff. He was one; the other flew a
jumpship owned by a non-pilot non-mechanic.

You know 3 now. I lost a jug on a PW 1830 (a few minutes after takeoff
actually) and I can assure you that engine was never shock-cooled.

--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html

I lost a jug in level flight on a 65 hp engine - not possible to overboost
or shock cool... So, that's 4...
denny
"Dale" wrote in message
...
In article ,
(Michael) wrote:


He could not overboost since it was not turboed.

Hmm. Try leaving the throttle in and pulling the prop back.

Do I KNOW that this caused the problem? Not really. But I know two
pilots who lost a jug on takeoff. He was one; the other flew a
jumpship owned by a non-pilot non-mechanic.

You know 3 now. I lost a jug on a PW 1830 (a few minutes after takeoff
actually) and I can assure you that engine was never shock-cooled.

--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html

Dale wrote
He could not overboost since it was not turboed.
Hmm. Try leaving the throttle in and pulling the prop back.

Never heard that called overboost, but OK. Never saw him do that
either.

Do I KNOW that this caused the problem? Not really. But I know two
pilots who lost a jug on takeoff. He was one; the other flew a
jumpship owned by a non-pilot non-mechanic.

You know 3 now. I lost a jug on a PW 1830 (a few minutes after takeoff
actually) and I can assure you that engine was never shock-cooled.

And the jug actually came off? When I say lost a jug, I do mean a
cylinder cracked and came off the engine.

I know LOTS of people who had stuck/munched valves.

Michael

In article ,
(Michael) wrote:



And the jug actually came off? When I say lost a jug, I do mean a
cylinder cracked and came off the engine.

Wow! I didn't realize you meant it literally. G

But yes, in my case the entire head came off the cylinder..only the
baffling kept it from going anywhere.

We didn't realize how bad it was...notice some smoke from the top of the
cowl on #4, reduced the throttle a bit and the smoke lessened a bit.
Instruments were all normal, was still putting out power..there was no
yaw. Returned for landing and the ground crew was looking at us kind of
funny as we taxied in...it was making a bunch of noise. G The piston
was beat up pretty bad, much longer and we would have started munching
the engine with debris going thru it.

--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html