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Charles posted:Yeah I was kinda curious of the usability of the airframe after that. They probably didn't hit do not exceed speed though? That plane exceeded Vne at some point, it’s a required part of the test program. There’s a difference between “the wings will fall off”, “the life of the airframe will be severely reduced if you do this” and “it’s fine”. The test flight program is to find the line between the latter 2.
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Feb 6, 2020 23:38
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There's Vne, then there's Veo, Vee exceed once.
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Feb 6, 2020 23:40
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Re: airframe limits I remember reading in Bob Hoover's book about once occasion where he was flying an airshow demonstration in the F-5 (I think. Could have been a T-38). The airframe was limited to 7.33g in service, but Bob decided it'd be a lot cooler if he could pull 9g. He went to the folks at Northrop and they basically said "Yeah we'll let you pull 9g in this case you'll be fine."
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Feb 6, 2020 23:53
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Ola posted:There's Vne, then there's Veo, Vee exceed once. Speaking of that - I don't think anyone's posted this yet: https://theaviationgeekclub.com/the-true-fastest-speed-ever-reached-by-a-lockheed-blackbird/ Someone copping to M BIG HEADLINE fucked around with this message at 01:29 on Feb 7, 2020 |
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Feb 6, 2020 23:54
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BIG HEADLINE posted:Speaking of that - I don't think anyone's posted this yet: https://theaviationgeekclub.com/the-true-fastest-speed-ever-reached-by-a-lockheed-blackbird/ 3.56, wow. Those engines definitely could do more than was good for them.
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Feb 7, 2020 00:04
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Charles posted:Yeah I was kinda curious of the usability of the airframe after that. They probably didn't hit do not exceed speed though? If you hit Vne and nothing falls off, the airplane's probably fine to continue flying after a thorough inspection. The bigger concern is a potential over-G when they pull out of the dive at high speed -- that sort of thing can permanently deform the airframe and there's no real way to fix that. If the video were sharper, you could work out the exact G-forces from the airspeed, attitude and time and see how they stack up to the stated limits.
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Feb 7, 2020 00:07
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Any non-aerobatic plane pointed roughly straight down is in immediate danger. The airspeed buildup rate is eye-opening, and can quickly force you into the right side of the V-G diagram and into a forced choice between overspeeding and over-G'ing - or both. And, likely, an asymmetrical over-G which is even worse. Especially given that you'll likely be doing this for the first time in your life.
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Feb 7, 2020 00:32
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Do note that he takes his time with the recovery, presumably to not over g. Or actually, maybe to keep AoA lower to prevent a secondary (deep) stall which might be a greater risk in a DC-9 come to think of it.
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Feb 7, 2020 00:36
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Ola posted:3.56, wow. Those engines definitely could do more than was good for them. So good I kinda wonder if the instrument’s calibration was by a touch.
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Feb 7, 2020 00:37
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hobbesmaster posted:Do note that he takes his time with the recovery, presumably to not over g. Or actually, maybe to keep AoA lower to prevent a secondary (deep) stall which might be a greater risk in a DC-9 come to think of it. I'd imagine over G is much more likely to cause wings fall off than overspeed.
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Feb 7, 2020 01:00
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Yeah, but overspeeding may cause loss of control authority which then leads to hitting the ground like a dart.
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Feb 7, 2020 01:15
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Carth Dookie posted:Yeah, but overspeeding may cause loss of control authority which then leads to hitting the ground like a dart. You mean like this?  
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Feb 7, 2020 02:28
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I love that the pilot flew that airplane again.
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Feb 7, 2020 04:14
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Causality did an episode on the 737 MAX Lion Air flight. https://engineered.network/causality/episode-33-737-max/ quote:With two crashes in five months of the new 737 4th Generation a design flaw seemed likely. We look at how Boeings focus on cost-avoidance, grandfathering and bending probabilities during design would ultimately cost 338 people their lives. some stuff in there I didn't know about, super detailed explanation about engineering standards.
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Feb 7, 2020 04:43
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FBS posted:You mean like this? That reminds me. Dan Bass passed out at altitude due to a carbon monoxide leak. Autopilot happened to be on a setting that brought him down on a reasonably gentle descent after fuel exhaustion. He crashed in a snowy field. Once he’d been in the fresh air long enough, he regained consciousness and walked away from the crash.  https://www.aopa.org/training-and-safety/online-learning/real-pilot-stories/dan-bass-accident-photos
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Feb 7, 2020 06:06
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wolrah posted:I mean, wasn't the 737 Max thing seriously aggravated by the AoA disagreement indicator being optional which would have been a pretty solid pointer in the direction of what was going wrong? Hahaha, people who think this are the absolute bane of my life, you monster 
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Feb 7, 2020 11:17
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Platystemon posted:That reminds me. Holy moly. He needs a "Jesus is my co-pilot, for reals" bumper sticker or something.
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Feb 7, 2020 12:38
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He really had all the luck. Imagine if he had loaded up more fuel. As it was he nearly froze to death, but he only had to stumble a quarter mile to a house where someone was home. She happened to be a nurse.
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Feb 7, 2020 13:43
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The Ferret King posted:Correct. Above certain airspeeds, the forces acting on the airframe can become so great that they cause structural damage. Maneuvering creates additional forces, so there are safe speeds for that too. This is even a deal with rockets. The shuttle would throttle down during “max-q” to reduce stress, and throttle back up as it got through to thinner air.
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Feb 7, 2020 14:26
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Sagebrush posted:there's no real way to fix that.
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Feb 7, 2020 15:00
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Russians are Russians. 3 years ago a Russian helicopter crashed while approaching Pyramiden on Svalbard, an old Soviet mining colony in the high Arctic. Visibility was way below VFR minimums, but Russians are Russians so they simply continued. They lost visual references and hit the water, but with almost zero speed so all 8 survived and evacuated no problem. But Russians are Russians, they had no flotation devices or immersion suits. This is at 78 degrees north. So they all died pretty fast in the water. It's almost amazing that there are so many Russians when they have such an intense death wish. Report in English available here, probable cause should just be "the accident was caused by Russians being Russian". https://www.aibn.no/Luftfart/Avgitte-rapporter/2020-04 By the way, Pyramiden is an amazing place and you should go there if you get the chance. But obviously don't fly there, or anywhere, on a Russian helicopter. https://www.youtube.com/watch?v=1_jYGVHRkuQ
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Feb 7, 2020 21:03
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Svalbard also has my favorite town name ever, Longyearbyen.
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Feb 7, 2020 23:19
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Pyramiden is a pretty cool place yeah. I was there about 10 years ago. Its possible a Russian guy I met there was the guide from your video. He took care of the place, but I'm pretty sure he also planted effects like old dolls and other "abandoned" belongings to increase tourist interest. There also was an old VW Passat there which was weird considering there was no real roads. It could be one of the most northern cars ever( Its a little bit farther north than the Top Gear Polar Special finish point)
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Feb 7, 2020 23:44
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It's windy as gently caress on the east coast today. I hit a new personal record minimum ground speed of 2 kts at 19,000 ft. We could have hit zero by being some irresponsible chucklefucks but that was as close as the pilots wanted to get to stall speed. Also a personal record low altimeter setting, it was 29.30 when we took off. I had to listen to ATIS twice to make sure I heard it right.
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Feb 8, 2020 01:22
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Nothing we didn't already expect, but the NTSB has confirmed there was nothing wrong with Kobe's helicopter https://www.npr.org/2020/02/07/803924851/ntsb-kobe-bryant-helicopter-engine-did-not-fail-before-crash quote:Federal investigators say the helicopter that crashed in Southern California last month killing NBA basketball star Kobe Bryant, his daughter and seven other people did not have an engine failure. The investigative update from the National Transportation Safety Board has not determined the cause of the crash. But it did give several new details.
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Feb 8, 2020 06:12
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Wingnut Ninja posted:It's windy as gently caress on the east coast today. I hit a new personal record minimum ground speed of 2 kts at 19,000 ft. We could have hit zero by being some irresponsible chucklefucks but that was as close as the pilots wanted to get to stall speed. Is 29.30 a low altimeter setting in general or just locally? I wanna say when I took instruction we had it set to 28.XX a few days E: flying in midwest EvenWorseOpinions fucked around with this message at 07:16 on Feb 8, 2020 |
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Feb 8, 2020 07:09
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EvenWorseOpinions posted:Is 29.30 a low altimeter setting in general or just locally? I wanna say when I took instruction we had it set to 28.XX a few days 980ish hPa (28.9inHg) is a solid cat1 hurricane pressure at sea level. I’m guessing you weren’t anywhere near sea level. hobbesmaster fucked around with this message at 10:11 on Feb 8, 2020 |
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Feb 8, 2020 10:09
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hobbesmaster posted:980ish hPa (28.9inHg) is a solid cat1 hurricane pressure at sea level. Doesn't matter, altimeter settings are referenced to sea level. DEN on a standard day is 29.92 same as JFK.
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Feb 8, 2020 10:15
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EvenWorseOpinions posted:Is 29.30 a low altimeter setting in general or just locally? I wanna say when I took instruction we had it set to 28.XX a few days I dunno, maybe I just luck out with the weather but it seems like most of the time it's 29.80 and up.
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Feb 8, 2020 13:31
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Down to ~29.78 or so is pretty normal. 29.00-29.77 is "wow, weather is lovely today." 28.00-28.99 is "Hey look at that tractor trailer that just flew by." Lowest I've ever seen is 28.25 or so, just before the station went offline during Irma.
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Feb 8, 2020 14:43
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I've seen 28.90-something and 30.87 just in Teterboro in the past six months. Winter weather patterns ahoy.
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Feb 8, 2020 15:01
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Sweet christ, in looking for the lowest recorded pressure I came across 25.69. Recorded by a reconnaissance flight in Typhoon Tip (1979). Wiki specified “lowest/non-tornadic”, which honestly scares me a little bit. https://en.m.wikipedia.org/wiki/Atmospheric_pressure#Records
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Feb 8, 2020 15:12
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Found on the Instagram page CombatLearjet: https://www.instagram.com/p/B8Tyrg8FlHE/?igshid=f4hlwbew0rr I’m not a pilot, but I assume it’s easier to land your plane if the wheels don’t try to go back airborne once you touch down 
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Feb 8, 2020 15:35
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Icon Of Sin posted:Found on the Instagram page CombatLearjet: Step 1 is not dragging your rear end in and whacking a berm before over the landing strip.
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Feb 8, 2020 15:45
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Icon Of Sin posted:Found on the Instagram page CombatLearjet: Alaska: Where Your Airstrips Resemble
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Feb 8, 2020 16:37
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MrYenko posted:Down to ~29.78 or so is pretty normal. 29.00-29.77 is "wow, weather is lovely today." 28.00-28.99 is "Hey look at that tractor trailer that just flew by." Depends on where you are, really. Here in the leeside of the Rockies, it's not unheard of during the winter to see down into the 28s when a strong lee-side low develops during a strong westerly flow. And also being in the frozen shithole of Canada, where Arctic air can rule for weeks at a time in the winter, it's not uncommon to see up into the 31s either.
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Feb 8, 2020 18:20
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Feb 9, 2020 14:20
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Biz jet bush pilot  https://www.youtube.com/watch?v=WSqGA37zrgA
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Feb 9, 2020 14:44
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The Instagram post 8s gone what was it? And what is that unusual plane on its belly?
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Feb 9, 2020 14:52
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https://www.bbc.com/news/uk-england-london-51433720 (as usual, press are idiots and got the wrong type for the photos)
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Feb 9, 2020 15:05
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