4130 can't be OA welded?

Blueskies wrote:
I meant while the part was in service. If an engine mount was brazed, and there was an engine fire, would the braze
joint fail (come apart) where a welded one would hold?



Dunno, Mongo.

I guess it would depend on how hot for how long.

But remember that it takes an acetylene flame to braze in the first
place.

If if gets that hot in the engine room, whether the mount welds hold or
not is probably going to be a secondary issue...

Richard

Its just gotta last long enough for me to get it on the ground ;-)




Getting it on the ground is no problem, gravity will help you with that
task, now doing it in a survivable manner, that is the trick.

George

"George" wrote in message . net...
Blueskies wrote:
I meant while the part was in service. If an engine mount was brazed, and there was an engine fire, would the braze
joint fail (come apart) where a welded one would hold?



Dunno, Mongo.

I guess it would depend on how hot for how long.

But remember that it takes an acetylene flame to braze in the first
place.

If if gets that hot in the engine room, whether the mount welds hold or
not is probably going to be a secondary issue...

Richard

Its just gotta last long enough for me to get it on the ground ;-)




Getting it on the ground is no problem, gravity will help you with that task, now doing it in a survivable manner,
that is the trick.

George

Reminds me of the guy with the souped up O-200 formula racer. The engine was putting out great power at something like
3200 rpm, till it threw a prop blade at something like 2000' agl... Shook real bad and tore the engine off the mount,
but the safety cable kept it from coming loose from the airframe, so he was able to get it back on the ground "in a
survivable manner". If it had broken completely loose the CG would have been way off and that would have been the end of
it...

Same thing with a fire in flight. I would at least want the engine to hang on for a while to give me a fighting
chance...

"Blueskies" wrote

Same thing with a fire in flight. I would at least want the engine to hang
on for a while to give me a fighting chance...

I would bet big that the firewall would be burned or melted off from the
aircraft, (thereby letting the engine loose) long before a braise got hot
enough to let loose.
--
Jim in NC

"Blueskies" wrote in message
et...
|
| "George" wrote in message
. net...
| Blueskies wrote:
| I meant while the part was in service. If an engine mount was
brazed, and there was an engine fire, would the braze
| joint fail (come apart) where a welded one would hold?
|
|
|
| Dunno, Mongo.
|
| I guess it would depend on how hot for how long.
|
| But remember that it takes an acetylene flame to braze in the
first
| place.
|
| If if gets that hot in the engine room, whether the mount welds
hold or
| not is probably going to be a secondary issue...
|
| Richard
|
| Its just gotta last long enough for me to get it on the ground
;-)
|
|
|
|
| Getting it on the ground is no problem, gravity will help you with
that task, now doing it in a survivable manner,
| that is the trick.
|
| George
|
| Reminds me of the guy with the souped up O-200 formula racer. The
engine was putting out great power at something like
| 3200 rpm, till it threw a prop blade at something like 2000' agl...
Shook real bad and tore the engine off the mount,
| but the safety cable kept it from coming loose from the airframe, so
he was able to get it back on the ground "in a
| survivable manner". If it had broken completely loose the CG would
have been way off and that would have been the end of
| it...
|
| Same thing with a fire in flight. I would at least want the engine to
hang on for a while to give me a fighting
| chance...

An ex Air Force pilot landed with his engine separated from his airplane
over Illinois a good many years back. I think the airplane was a Globe
Swift that had a Continental 65 in it with a wood prop. The whole
incident from throwing a prop blade, physically loosing the engine and
making a safe landing took place in less than a minute. When the
airplane whipped up into a stall, his jet training kicked in, and he
knife edged it. Let the nose fall through and with full down elevator
and plenty of airspeed he was able to do a near vertical dive to a fresh
plowed field. At the last second he rounded out and plowed the field
again with the firewall. The article said the investigators figured the
plowed field kept the airplane from whipping back up into a stall after
initial contact.

--
Anyolmouse

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