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Last time I flew near a jump zone, the local TRACON was making an announcement every minute or two about parachute operations in the vicinity of KXYZ and steering aircraft clear of it if they had flight following. Helpful, but obviously only useful if you're talking to the controller. out of curiosity, how fast would you have to be falling to pass completely through the blades of a hovering helicopter without injury, assuming a best case scenario?
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Dec 14, 2019 06:21
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| # ? May 17, 2024 22:48 |
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Aeronautical: yep Insanity: you betcha! Birth of the Bell Helicopter: https://www.youtube.com/watch?v=k562IriqnlA fe: Sagebrush posted:out of curiosity, how fast would you have to be falling to pass completely through the blades of a hovering helicopter without injury, assuming a best case scenario? https://www.youtube.com/watch?v=k562IriqnlA&t=647s
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Dec 14, 2019 06:50
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Platystemon posted:I don’t go looking for them in the wild, but I’m surprised I haven’t seen more neoliberal columnists arguing that pilot certification is the real monster that killed all those people. I had a freelancer seriously try and pitch me a story that the two crashes were all the fault of the third world airline pilots and not Boeing. That’s the last pitch of his I’ll listen to.
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Dec 14, 2019 13:49
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karoshi posted:fe: gently caress!!
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Dec 14, 2019 16:38
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The main rotor of the AStar turns at 396 RPM, so the blade passing frequency is about 20 Hz. If we assume you’re dropping through the rotor disk vertically (and have no thickness), then a 6’ tall person has to be going at least 120 ft/s (70 kts) in the best case scenario where you pass just behind one blade to dive through the rotor. Sounds like the terminal velocity of a person head down is around twice that (~130-150 knots), so it’s doable, but very risky!
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Dec 14, 2019 17:27
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karoshi posted:Coincidentally they carried out that experiment: I'm totally picturing some cigar chomping executive elbowing his way onto the the test site "outta my way, outta my way here, I'm a pilot, let me fly this thing" ~karma happens~
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Dec 14, 2019 17:28
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Tetraptous posted:The main rotor of the AStar turns at 396 RPM, so the blade passing frequency is about 20 Hz. If we assume you’re dropping through the rotor disk vertically (and have no thickness), then a 6’ tall person has to be going at least 120 ft/s (70 kts) in the best case scenario where you pass just behind one blade to dive through the rotor. Sounds like the terminal velocity of a person head down is around twice that (~130-150 knots), so it’s doable, but very risky! The stunt coordinator for the next next bond film just had an uncontrollable shiver. Either that or Tom Cruise is already in training for it for the next mission impossible. He’s like 5’ so even easier!
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Dec 14, 2019 17:44
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It's probably more like 2' since you don't usually fall upright. Also you have to take blade and person width into account. Ideally you're facing directly toward or away from the rotor hub, I guess, to maximize your lateral separation from the blades.
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Dec 14, 2019 18:29
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priznat posted:The stunt coordinator for the next next bond film just had an uncontrollable shiver. That's one stunt that I think might actually fail the audience suspension of disbelief.
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Dec 14, 2019 18:36
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Godholio posted:It's probably more like 2' since you don't usually fall upright. Also you have to take blade and person width into account. Ideally you're facing directly toward or away from the rotor hub, I guess, to maximize your lateral separation from the blades. The question is whether the faster speed for the more aerodynamic shape compensates for the smaller cross section or not. I would presume the smaller cross section wins out but I haven't run the numbers. You'd also have to keep your body very straight and level...
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Dec 14, 2019 19:53
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Munin posted:The question is whether the faster speed for the more aerodynamic shape compensates for the smaller cross section or not. I would presume the smaller cross section wins out but I haven't run the numbers. In addition to moving slower, you take up more swept area in the disk if you fall flat. That’s probably a fair trade if you’re near the tips, but a bad move closer to the blade roots. Probably the optimal strategy for survival would be to dive but tuck your legs just before entering the rotor and cannonball past it. I was not willing to do the math, as I don’t think it has a first-order effect on the main result: if you fall through a helicopter rotor your odds of survival are on the same order as your odds of death.
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Dec 14, 2019 20:03
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There's a much simpler explanation: The Boeing suit survived because it was the first time a helicopter had ever tasted manflesh. It didn't know it was hungry yet.
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Dec 14, 2019 22:19
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Godholio posted:It's probably more like 2' since you don't usually fall upright. Also you have to take blade and person width into account. Ideally you're facing directly toward or away from the rotor hub, I guess, to maximize your lateral separation from the blades. With my luck I'd time my pass through the rotor disc flawlessly, only to crater through the tail boom. e: I possess the aerodynamic profile of a Super Guppy (wingless).
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Dec 15, 2019 04:55
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I showed that Bell video to my wife (a P. Eng) and she literally just watched my monitor screen with mouth agape for about 15 seconds and then "lets run the math and see what it would take to go through the rotor unscathed"
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Dec 15, 2019 04:59
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Aeronautical Insanity:
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Dec 15, 2019 23:21
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MrYenko posted:Aeronautical Insanity: Looks like a great plane to spend 18 hours in. https://photos-e1.flightcdn.com/photos/retriever/a0642abad9c314bf42d13ee0fa8b72af97214b2c It can't have 18 hours of fuel.... right? He has to land somewhere surely?
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Dec 15, 2019 23:39
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MrYenko posted:Aeronautical Insanity: The pilot is this man?
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Dec 15, 2019 23:40
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madeintaipei posted:The pilot is this man? Sure looks like it: Sub-Class C-1d (Landplanes: take off weight 1750 to 3000 kg) Group 1 : internal combustion engine Type of record Distance Performance 13 059,67 km Date 02 Mar 2013 Course / Location Guam (Guam) - Jacksonville, FL (USA) How can that little thing hold that much fuel?
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Dec 15, 2019 23:43
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hobbesmaster posted:Sure looks like it: Jakarta-Capetown Thursday, then Riverside-San Juan Saturday, back to Ontario, CA today. Busy fella!
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Dec 15, 2019 23:53
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Oh, duh. World record attempt.
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Dec 16, 2019 01:40
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Apparently the engine in his Lancair IV burns about 17gph in economical cruise at ~280kn, so that's about 19mpg equivalent. 425 gallons to fly that 13,000km leg. That's 2550 pounds of fuel, well beyond the 1350lb standard useful load, so idk what sort of modifications he's got but it is absolutely not a stock aircraft. Even assuming best-case efficiency and a constant high-speed tailwind he's still way overloaded at takeoff.
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Dec 16, 2019 01:51
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Sagebrush posted:Apparently the engine in his Lancair IV burns about 17gph in economical cruise at ~280kn, so that's about 19mpg equivalent. 425 gallons to fly that 13,000km leg. That's 2550 pounds of fuel, well beyond the 1350lb standard useful load, so idk what sort of modifications he's got but it is absolutely not a stock aircraft. Even assuming best-case efficiency and a constant high-speed tailwind he's still way overloaded at takeoff. 361 gallons, according to that article. gently caress me, 31 hours to Jakarta.
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Dec 16, 2019 01:58
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New Top Gun trailer. https://www.youtube.com/watch?v=g4U4BQW9OEk  Highway to the Aurora zone.
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Dec 16, 2019 15:16
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That trailer peaked at 11 seconds. It seems ok?
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Dec 16, 2019 15:47
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Is that supposed to be Goose's son?
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Dec 16, 2019 16:16
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Mr. Funny Pants posted:New Top Gun trailer. There better be some officer in charge of that guard post yelling about wanting some butts after Maverick blows the roof off. Otherwise is it even really a Top Gun movie?
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Dec 16, 2019 17:00
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Scruff McGruff posted:There better be some officer in charge of that guard post yelling about wanting some butts after Maverick blows the roof off. Otherwise is it even really a Top Gun movie? WRITING CHECKS YOUR BUTT CAN'T CASH
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Dec 16, 2019 17:56
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Scruff McGruff posted:There better be some officer in charge of that guard post yelling about wanting some butts after Maverick blows the roof off. Otherwise is it even really a Top Gun movie? I think the guy ducking in terror at the back of the SUV will take care of it.
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Dec 16, 2019 17:59
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So anyone care to guess what will put Maverick in whatever they will call the hypersonic secret super-duper plane? I think Mav will be on the outs from the Navy. The students he was instructing will get into some kind of horrible trouble. Military guy 1: "We have to help them, they will all die!" Military guy 2: "How? We don't have anything in our arsenal that can get to them in time." Shadowy military guy: "Yes we do." [SMG briefs them on the F-44 Hypercock] MG1: "But we don't have anyone who can fly that thing!" MG2: "Yes we do."
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Dec 16, 2019 18:10
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Maybe it's time we start getting more action stars who aren't about due for hip replacements?
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Dec 16, 2019 18:15
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RandomPauI posted:Maybe it's time we start getting more action stars who aren't about due for hip replacements? At least the love interest is within a decade of Cruise's actual age.
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Dec 16, 2019 18:17
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RandomPauI posted:Maybe it's time we start getting more action stars who aren't about due for hip replacements? You’d think so but MY WIFE thinks Cruise has ‘got better with age’. Win/win movie - eye candy for her in the shape of TC and plenty of plane porn for me.
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Dec 16, 2019 18:27
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Mr. Funny Pants posted:So anyone care to guess what will put Maverick in whatever they will call the hypersonic secret super-duper plane? After stalling out at O-6 he probably got shuffled off into the acquisitions side of things. Except being a movie, instead of sitting at a desk writing memos about why the F-44 failed 8 out of 9 main test requirements during its last test period, he actually gets to fly the thing and it works.
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Dec 16, 2019 18:31
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MrYenko posted:Aeronautical Insanity: Ugh, what a pain: Ontario, CA vs. Ontario, CAn e: : "Ontario has a international airport!" "well yeah, it has a bunch?" "Uh, no, just the one?" "What are you talking about? It has at least three." "Are you thinking about LA?" "WHY WOULD I BE THINKING ABOUT LA?" [storms off] Nebakenezzer fucked around with this message at 18:58 on Dec 16, 2019 |
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Dec 16, 2019 18:51
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Welp Boeing is shutting down the 737 line in January, glad I haven't made any big financial purchases lately
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Dec 16, 2019 23:09
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rscott posted:Welp Boeing is shutting down the 737 line in January, glad I haven't made any big financial purchases lately  Temporarily.
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Dec 16, 2019 23:11
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It’d be a real shame to see the 737 go out with a whimper.
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Dec 16, 2019 23:14
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MrYenko posted:It’d be a real shame to see the 737 go out with a whimper. Boeing will be making a louder sound than a whimper.
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Dec 16, 2019 23:18
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MrYenko posted:It’d be a real shame to see the 737 go out with a whimper. Better deal than going out with loud screams like the passengers.
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Dec 16, 2019 23:19
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Real glad I just sold my condo, and used to profits to pay off all my debts then stuffed the rest of the cash into savings...
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Dec 16, 2019 23:30
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