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Old 03-06-2014, 11:47 AM   #31
B47
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You guys are missing the point on this bird/rock ingestion and jet engines. It's not funny,but it is serious.

If you Goggle 14 CFR 33.76 and open "Bird Ingestion" you will read about the FAA requirements that a jet engine manufacturer must comply with before his engine can be FAA certificated for use on aircraft.

The regulation requirements clearly calls for a "bird" (the size of the bird varies according to many factors,including the engine inlet size) to be shot into the engine to see if the engine can survive the bird ingestion and keep turning and burning while operating.

So No these guys just didn't want chicken salad sandwiches - they are just complying with the regulations to keep the flying public safe. This is just one of the zillion FAA requirements aircraft and engine manufacturers must show compliance with before their product can be FAA certified. It's one reason aircraft are so expensive and yet so safe.

Feel free to PM me if you wish to.
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Old 03-06-2014, 11:50 AM   #32
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Originally Posted by Arefbee View Post
Why frozen chickens??? A rock would be cheaper and less to clean up!

The school I went to had an Messerschmidt ME-262 engine and actually would run it up sometimes - until someone dropped a nut into it. It is now a cut-away display of that engine.

That looked like an all composite aircraft. I'm guessing the avionics were salvageable, maybe the tires, possibly the seats. Not much else. FOD would be all that was left.
They use birds because it's highly unlikely that a jet engine is going to ingest a rock while flying.
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Old 03-06-2014, 12:01 PM   #33
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nasa

Quote:
thaw the chicken.

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Old 03-06-2014, 12:10 PM   #34
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Originally Posted by Ford Idaho View Post
nasa




The reg doesn't specify that the bird used must be frozen,but they all have been frozen in my experience.

The tests I have seen use some sort of air powered cannon to shot the bird into the operating engine. This might be on YouTube.
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Old 03-06-2014, 12:15 PM   #35
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I knew exactly why they used chickens. I was making light of the practice because we all got a good laugh at Lycomings expense. Bird strikes are all too common and many we'll never hear about unless there is an engine out, airframe damage or work in the industry and read the reports.
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Old 03-06-2014, 12:16 PM   #36
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Originally Posted by B47 View Post
The reg doesn't specify that the bird used must be frozen,but they all have been frozen in my experience.

The tests I have seen use some sort of air powered cannon to shot the bird into the operating engine. This might be on YouTube.
Myth busters built an air powered "canon" and pasted some chickens
(thawed)on air plane windshields.

After blasting two or three they found out the windshields were not rated to handle "bird strikes" LMO for couple of minutes...
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Old 03-06-2014, 12:25 PM   #37
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Originally Posted by Ford Idaho View Post
Myth busters built an air powered "canon" and pasted some chickens
(thawed)on air plane windshields.

After blasting two or three they found out the windshields were not rated to handle "bird strikes" LMO for couple of minutes...
I forgot about windshields and bird strikes. 14 CFR 25.631 does require a bird strike against aircraft windshields test before certification and calls for a 8 pound bird.

14 CFR 25 is the large aircraft certification requirements.
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Old 03-06-2014, 08:22 PM   #38
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calls for a 8 pound bird
"What's a henway?"

"About 3 lbs"

(Sorry, couldn't help myself.)

Seriously, I don't think chickens get that big, do they? (I'm no farmer). If not, I wonder what they're using. Small turkeys?
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Old 03-06-2014, 08:50 PM   #39
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"What's a henway?"

"About 3 lbs"

(Sorry, couldn't help myself.)

Seriously, I don't think chickens get that big, do they? (I'm no farmer). If not, I wonder what they're using. Small turkeys?
If you read my previous posts on this thread and read the FAA regs I quoted
( and I don't expert many of you to do so as many find them dry,but I find them interesting) you will see that the regs (14 CFR 33.76) don't call for a particular type of bird, they simply say "bird". None of the bird strike regs contain the word "chicken". Also the engine ingestion reg bases the bird size on the size of the engine inlet.

The windshield reg (14 CFR 25.631) does require a 8 pound "bird".
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Old 03-06-2014, 08:56 PM   #40
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not aircraft have tiedowns, our line crew forgot to chock all the tires and hook up the nose gear scissors, wind storm crept up at night and this is what I came into work to find. took it out of service for 2 months while boeing got us a repair scheme
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