Posted on 03/10/2021 10:47:35 AM PST by CondoleezzaProtege
Any guess as to what a turbine blade is worth on an F-18 out of curiosity?
I nearly stroked out after finding out heh.
A jet engine will pluck and fry a bird at the same time.
A similar really scary incident happened in 2018 on a B777 flight that was 200 miles out of Hawaii when the blade blew:
...and disks!
“Uh-oh! Hot dog!”
Very likely a combination. Nobody checked and noticed stress fatigue and NDT probably hadn’t run any scheduled tests as they cost too much.
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Perhaps but fatigue is tricky and some luck is involved. By the time a fatigue crack actually shows up so that it can be found using NDT, one hopes that it will still run safely for X number of hours. However, there’s also the possibility that from the time the crack becomes evident (during operation in the sky), there many not be enough time for it to hold together before it becomes completely unraveled.
My guess is that we’re going to find that the fatigue life on this fan is much shorter than what was projected.
The design of the engine/nacelle combination “is supposed to” contain engine parts coming loose.
As much as Tort lawyers want a jury to believe, NOTHING is perfect.
Accidents DO happen.
There is a Cost vs Benefit comparison for everything. However, paper shufflers, i.e. Lawyers, Politicians, Admin, HP, “Journalists” seldom get hit with their own “accident “ investigations. When they do, they get one of their own to deflect the accountability.
For physical, engineered & manufactured products you work as hard as you can to make the product safe & durable. You set scheduled inspections, if any, to hopefully insure safety without unduly affecting the use of the product.
Still, “some days you get the bear, some days the bear gets you.”
I don’t know if there’s any substance to this, but I had heard these new ones were hollow to save on costs.
That was impressive. I wonder if First Officer Ed Gagrin (in the jump seat) is related to Yuri?
That’s totally incorrect.
The turbine blade is hollow for cooling.
It’s one of the most highly engineered parts on any machine.
Are you just speculating or have some evidence of that?
Gagarin, the won time I needed spelt Czech it foaled me....
That's the reality a lot of people forget - we can only decrease the risk, but we cannot eliminate it.
Neither can the government. Especially not the government.
Not on the 18s I worked on.
Actually, I never was in the airforce after the infantry, I’ll deny I ever was heh.
“(I have had engines fail spectacularly during test - sick sound, sicker feeling).”
I, just an observer, am amazed that the separated blade didn’t tear up more of the engine especially nearby blades.
I don’t know if there’s any substance to this, but I had heard these new ones were hollow to save on costs.
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Not sure what is meant by new... this design has been around for quite a while (25 years let’s say). Regardless, yes they are hollow but I highly doubt that it had any thing to do with costs. In fact, they likely are significantly more costly.
“. One woman was ingested into a CF-18, but thankfully the chin strap wasn’t on and the helmet went first and destroyed the engine.”
Happened with an A-6.
I worked for GE Aircraft Engines for fifteen years (manufacturing) and you would not believe the amount of “pencil whipping” that went on.
My guess is that we’re going to find that the fatigue life on this fan is much shorter than what was projected.
Evidently thermal acoustic testing isn’t the answer.
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