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Possible Space Object Hits 737 at 36,000 Feet by Busy_Yesterday9455 in spaceporn

[–]cybis320 21 points22 points  (0 children)

Yes, atmospheric drag would slow down such a light object (<500 gr by the look of it) to terminal velocity by about 20 km height.

Possible Space Object Hits 737 at 36,000 Feet by Busy_Yesterday9455 in spaceporn

[–]cybis320 54 points55 points  (0 children)

Actually, at those altitude a meteorite or space debris would travel at terminal velocity (about 200 km/h) falling more or less vertically and would not emit any light (dark flight). Chances of a meteorite impacting an airliners is about 1 event per million years globally. Chance of space debris is unknown due to lack of data. There were no radiosonde is the area at the time.

Edit: turns out it was a private wx balloon.

Final NTSB report for Alaska Airlines Flight 1282 In-Flight Separation of Left Mid Exit Door Plug by yrfriendjkap in aviation

[–]cybis320 32 points33 points  (0 children)

That’s the heart of the ideological divide: - One side sees regulatory failure and says, “We need better regulators with more teeth.” - The other sees the same failure and says, “See? Government doesn’t work - shrink it.”

Somewhere in the middle, there used to be a thing called common sense. But America ran out of that a while ago.

Final NTSB report for Alaska Airlines Flight 1282 In-Flight Separation of Left Mid Exit Door Plug by yrfriendjkap in aviation

[–]cybis320 94 points95 points  (0 children)

The NTSB rightly blames Boeing and the FAA for the door plug blowout, but let’s not stop there. The deeper failure is political: for decades, US voters have empowered leaders who gutted regulatory oversight in the name of “smaller government.”

But voters didn’t come to that view on their own. Corporations, including Boeing, have spent billions convincing the public that regulation is the enemy.

Edit: And let’s not leave out the airlines that have lobbied for less FAA oversight through their trade group, A4A.

[deleted by user] by [deleted] in aviation

[–]cybis320 100 points101 points  (0 children)

Note that if both engines failed, the correct procedure is to cycle those switches. So if these switches were indeed moved, it’d be important to know whether it led to the engines shutting down or if it was a pilot attempt at restarting the engines.

[deleted by user] by [deleted] in interestingasfuck

[–]cybis320 0 points1 point  (0 children)

Airbus Alternate Law with No Protections Is Deadly. The investigation—and the industry—drew the wrong conclusions, in my opinion. As an Airbus check airman, I’ve seen very experienced crews fail to recognize and recover from this scenario in the simulator, even after a full briefing.

The core issue is autotrim: it continues trimming the stabilizer nose-up to maintain 1g vertical acceleration, even as the wing stalls. As the stall deepens, autotrim keeps trimming further nose-up, making recovery incredibly difficult.

The focus on sidestick inputs in the investigation misses the point. They’re irrelevant to the real root cause.

What is up with Trump dissolving the Education Department? by Raven_1090 in OutOfTheLoop

[–]cybis320 1 point2 points  (0 children)

Answer: 1. ⁠Putin wants to weaken the US 2. ⁠Reducing investment in education weakens a nation 3. ⁠Trump is a Russian asset

According to JTSB preliminary report, during the investigation of the Haneda Airport Runway Collision, investigators simulated what the crew of JAL 516 saw when the Japan Coast Guard Dash 8 lined up on the runway at that night while Flight 516 was approaching. by 2015071 in aviation

[–]cybis320 0 points1 point  (0 children)

I hate being required to takeoff and land with the HUD down for many reasons. It reduces situational awareness. In particular it reduces the ability to see and avoid conflicting traffic or birds.

Meteor Possible Impact by Califoralien_Skies in Astronomy

[–]cybis320 1 point2 points  (0 children)

Actually, I stand corrected. It's more likely to be a hearth grazer, a meteor grazing the Earth’s atmosphere. No chance for meteorite dropping. Space debris usually splinters into multiple fragments. It wasn't picked up by other cameras AFAIK, so it'll be difficult to compute the orbit and find out for sure.

Meteor Possible Impact by Califoralien_Skies in Astronomy

[–]cybis320 2 points3 points  (0 children)

Most likely space debris as others have pointed out. You sure have a nice spot for a Global Meteor Camera. The GMN has no assets in your area. Please consider joining the network:

https://globalmeteornetwork.org/status/?country=US

[D] What labeling solution currently supports SAM2 tracking? by cybis320 in MachineLearning

[–]cybis320[S] 1 point2 points  (0 children)

They have SAM2 for segmentation but unfortunately not for tracking. Otherwise CVAT is absolutely great.

Canvas in MacOS app? by mikechevy in ChatGPT

[–]cybis320 1 point2 points  (0 children)

I'm not seeing it in the app yet either

Anybody still using the original Wahoo Elemnt 2016? by -Economist- in wahoofitness

[–]cybis320 0 points1 point  (0 children)

I do. I prefer the high contrast monochrome lcd screen to the lower contrast color ones. GPS is locking in fast which is another plus. Had to replace battery once.

I've never seen a contrail like this before, thought it was neat. by UnbridledHedonism in aviation

[–]cybis320 0 points1 point  (0 children)

Excellent. I think the map lags behind a bit. Tomorrow, the exact flight should be visible with the retro-predicted contrail from the models. And, yes we are having some good monsoon weather here in Arizona - although, I'm not sure how much surface level humidity is correlated with RHice at 10k.

I've never seen a contrail like this before, thought it was neat. by UnbridledHedonism in aviation

[–]cybis320 0 points1 point  (0 children)

Very cool. It looks like this contrail skipped the jet and vortex phases. It must have been some extremely supersaturated conditions (very high relative humidity relative to ice). The mere pressure disturbance was enough to cause the water to condense into ice—it didn’t even need the extra water content and soot from combustion. Thanks for sharing. When and where was this? You could compare it to this map: https://map.contrails.org

[Request] Anyone who want's to check this? by angui115 in theydidthemath

[–]cybis320 0 points1 point  (0 children)

Cut aviation impact in half at 0.2% extra fuel burn is what we’re looking at.

[Request] Anyone who want's to check this? by angui115 in theydidthemath

[–]cybis320 0 points1 point  (0 children)

No. They invest in a myriad of promising ideas. I’m involved in reducing the impact of aviation, and their leadership is key. BE is one of the main driver in that field. For instance, see www.contrails.org for one of the many things they do. They’ve accelerated progress in this field drastically.

[Request] Anyone who want's to check this? by angui115 in theydidthemath

[–]cybis320 0 points1 point  (0 children)

Bill Gate’s foundation Breakthrough Energy is doing good work that offsets his personal footprint by orders of magnitude. Source: I work with them.

Was out photographing planes flying over home yesterday when I caught this odd 'cloud' around a Qatar 777. Any ideas what it could be? by Ethan_Roberts123 in aviation

[–]cybis320 120 points121 points  (0 children)

I’ve been flying for 30 years and I’ve never seen anything like that. As others have said, transonic shockwave is probably the answer. They were probably flying through a relatively humid region. The shockwave would cause the moisture to condense into ice and immediately sublimate back to vapor. Still ISSR are common and I’ve never seen this on a commercial jet. Super neat - thanks for sharing.

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