"ttyymmnn" (ttyymmnn)
08/24/2020 at 10:03 • Filed to: Planelopnik
1
11|
"ttyymmnn" (ttyymmnn)
08/24/2020 at 10:03 • Filed to: Planelopnik | 1
| 11 |
What happens when a an unmanned aircraft system (UAS, or more popularly, drone) gets ingested by a jet engine? The FAA is going to find out.
!!! UNKNOWN CONTENT TYPE !!!
The FAA Reauthorization Act of 2016 states that “in continuation of ongoing work, shall coordinate a program to conduct comprehensive testing or modeling of unmanned aircraft systems colliding with various sized aircraft in various operational settings, as considered appropriate by the FAA, including subpart (4)(D) Collisions between unmanned aircraft systems and various parts of an aircraft, including an engine.” Congressional Mandate, H. R. 636 – FAA Extension, Safety, and Security Act of 2016, Section 2212 states, “in testing and providing a final report detailing the overall risks associated with, and the underlying data and analysis for an actual UAS ingestion into a representative mid- to high-bypass gas turbofan engine of current commercial airliners.”
In related news, the FAA is also beginning to research drone detection and mitigation at commercial airports.
https://www.faa.gov/news/updates/?newsId=95737
ItalianJobR53 - now with added 'MERICA and unreliability
> ttyymmnn
08/24/2020 at 10:09 |
|
Would like to see a slo mo of the engine ingesting a drone.
|
ttyymmnn
> ItalianJobR53 - now with added 'MERICA and unreliability
08/24/2020 at 10:13 |
|
I’m guessing it will be a much bigger problem than ingesting a bird.
Fun engine ingestion factoid – All the bits of bird meat, blood, and bone that gets chewed up by the engine has a name: “ Snarge.”
|
ItalianJobR53 - now with added 'MERICA and unreliability
> ttyymmnn
08/24/2020 at 10:14 |
|
Ya, a drone can have more metally bits in it than a bird i guess
Googling Snarge recipies
|
ttyymmnn
> ItalianJobR53 - now with added 'MERICA and unreliability
08/24/2020 at 10:15 |
|
Most of the concern is about the battery. Drones vary in size, too.
user314
> ttyymmnn
08/24/2020 at 10:18 |
|
This is something that absolutely needs to happen, before some jagoff’s DJI gets sucked up by an Airbus and we find out with a hundred lives in the balance .
Having said that, the headline seems to be contradicted by the last sentence of the story:
The FAA is working on a timeline to award contracts and move forward with the live ingestion test.
I mean, I guess that’s close to “ready” for government work, but are we talking 2 years? 5? 10?
|
user314
> ttyymmnn
08/24/2020 at 10:20 |
|
FOD and a potential explosive. Fun!
CalzoneGolem
> user314
08/24/2020 at 10:51 |
|
You and I have very similar definitions of fun.
If only EssExTee could be so grossly incandescent
> ttyymmnn
08/24/2020 at 11:30 |
|
My guess is that it doesn't have enough bypass.
kanadanmajava1
> ttyymmnn
08/24/2020 at 12:01 |
|
A lithium ion batteries are quite fragile and soft. And I don’t think the fire aspect isn’t a big issue inside a jet engine as a lot burning is already happening. But th e hard part s of the electric motors could be more troublesome for the compressor blades. Big drones might have several tennis ball sized motors.
Full of the sound of the Gran Fury, signifying nothing.
> kanadanmajava1
08/24/2020 at 17:40 |
|
But how much is going to get to the core of the engine? Centrifugal force is more likely to fling the bits through the bypass ducts rather than the center. Granted, some will hit the first compressor stage or two, but I’d think you’d have to worry more about the broken and unbalanced fan more than anything else.
|
kanadanmajava1
> Full of the sound of the Gran Fury, signifying nothing.
08/24/2020 at 18:40 |
|
The first stage compressor stage blades are likely the most fragile ones too . And they also cause the worst damage if the shatter. Maybe some parts could bounce from the ducting walls and enter the combustion chamber but not many. But these are indeed quite minor problem.