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Frame from A380 Blade Off Test Plays via YouTube's privacy-enhanced embed

A380 Blade Off Test

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1 HN user recommended this demo1 month2010–2026 score 1
Years with an HN recommendation, 2007–2026

Linked in aviation threads to show that engines are designed to contain a failed fan blade.

Footage of an Airbus A380 engine blade-off test, in which a fan blade is deliberately released at full thrust to show the engine contains the failure.

“There are much longer versions on YT, e.g. this one [0] which covers it in more detail” (HN, 2021)

1 recommendations · 3 citations · Demos

4 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@hazeii Feb 2021 Recommends
on HN thread United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
They normally have high-speed cameras running; that short video is a mish-mash of super-slow-mo and regular speed footage. There are much longer versions on YT, e.g. this one [0] which covers it in more detail (watch the people in the room jump when it blows - despite being a fair distance away). [0] [this video]
Longer version of the blade-off test footage in more detail

Citations, criticism and jokes

@yread Nov 2010 Cites it
on HN thread Qantas keeps A380s grounded over engine 'anomalies'
the engines are designed to contain a fan blade[1], not a turbine disk [2]. Fan blade is a thin piece of light alloy where turbine disk is solid piece of steel. [1] [this video] [2] [link]
Shows engines are designed to contain a fan blade failure
@sandworm101 Feb 2021 Cites it
on HN thread United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
fan blade failures are expected. Engines are designed to contain failed blades. There is a huge test that is done whereby a blade is "failed" at full throttle. Engine dies but damage is to be contained. [this video] (A380 "blade off" test, rare footage of giant engine failing)
Footage of a full-throttle blade-off test where damage is contained
@KennyBlanken Jul 2026 Cites it
on HN thread Why Jet Engines Aren't "Made in China"
Read more
> A failure in these blades would be catastrophic, resulting in the destruction of the engine, likely followed by the plane itself. Aaaaand the author just lost any credibility with me whatsoever. This is someone who knows big words, maybe did some research and ChatGPTing, and doesn't actually know shit about aircraft or their engines. On passenger aircraft because passengers sit directly inline with the path a blade with insane levels of kinetic energy will probably go, the nacelle is designed to contain it. The engine must be able to contain a "blade off" event where a blade snaps during full rated thrust. Two videos: [this video] [link] The aircraft will not be "destroyed." The blade could fail during takeoff climb and the plane would still be able to climb because all twin engine passenger jet aircraft must be able to conduct all phases of flight on one engine. SWA 1380 had a passenger fatality not because of the blade hitting them, but because part of the cowling disintegrated, broke the window, and she was partially sucked out of the aircraft, which killed her. If she'd been wearing her seatbelt, she would likely be alive today. As would several other passengers who, over the years, have been killed by debris breaking the window and them being sucked out. The blade itself did not leave the engine. [link] That article lists a number of incidents, in roughly half of which the blade was contained. All the flights made it back to an airport...
Evidence that engines must contain a blade-off event

Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.

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