Skydiver-leaps-from-plane-with-no-parachute   DELIBERATELY .... and lived - Page 1
Forum section: electronics / general

author: Brumby
author_rank: Unknown
timestamp: July 31, 2016, 06:32:58 am
content: http://www.abc.net.au/news/2016-07-31/us-skydiver-leaps-from-plane-with-no-parachute/7675822https://youtu.be/aOBavry0K2E"Pay attention to the science and the math behind this. And we'll show you what's possible," Mr Aikins said.How good isyourscience and math....?(I believe mine is OK - but I think I'll be limiting my risk to cutting some timber too short - or letting out some magic smoke.........)Edit: Add direct YT link.

author: ez24
author_rank: Super Contributor
timestamp: July 31, 2016, 06:41:22 am
content: I would add this to the title: "and lived"amazing

author: Brumby
author_rank: Unknown
timestamp: July 31, 2016, 06:49:57 am
content: Title changed....

author: Assafl
author_rank: Frequent Contributor
timestamp: July 31, 2016, 07:02:09 am
content: I would say experience more than science. Even then he was damn close to the edge of the top net...Very impressive indeed.

author: Brumby
author_rank: Unknown
timestamp: July 31, 2016, 07:13:01 am
content: Experience found the target. Maths and science made it survivable without any(?) injury.

author: German_EE
author_rank: Super Contributor
timestamp: July 31, 2016, 08:52:37 am
content: I can't find them right now but there are records of pilots and/or bomber crew members who fell from a great height and survived, this is bringing it up to date. When I was young and foolish I did freefall parachuting for a while but I always made sure that I had a main chute and a reserve, this is slightly on the side of crazy.

author: H.O
author_rank: Frequent Contributor
timestamp: July 31, 2016, 09:31:45 am
content: Slightly? I was just watching the dude on Youtube AND knew he'd make it and my heartrate was still at 150 - just as his :-)I don't know what he's trying to proove but a great stunt for sure. What's next? Oh those adrenaline junkies.

author: Wytnucls
author_rank: Super Contributor
timestamp: July 31, 2016, 09:34:11 am
content: Quote from: German_EE on July 31, 2016, 08:52:37 amWho needs a net:https://en.wikipedia.org/wiki/Nicholas_Alkemade

author: EEVblog
author_rank: Unknown
timestamp: July 31, 2016, 09:35:46 am
content: Quote from: Assafl on July 31, 2016, 07:02:09 amYep, totally experience at play here.Probably similar odds of survival as those wingsuiters who target 2m wide holes in rocks.Do this 10 times and odds are you will eventually miscalculate.

author: TheAmmoniacal
author_rank: Unknown
timestamp: July 31, 2016, 09:48:08 am
content: Terminal velocity in that position is about 140 km/h (~38 m/s), he seems to reach 0 km/h in about 2 seconds. That's a g-force of deceleration of about (39/2)/9.81 = 2g. Which is not a lot.

author: Jwalling
author_rank: Unknown
timestamp: July 31, 2016, 09:59:14 am
content: Crazy! Interesting effect where it looks like jet vapors coming out of their feet. I wonder what causes that?Jay

author: TheAmmoniacal
author_rank: Unknown
timestamp: July 31, 2016, 10:02:54 am
content: Quote from: Jwalling on July 31, 2016, 09:59:14 amThose are smoke canisters, people skydive with those for .. the effect.

author: German_EE
author_rank: Super Contributor
timestamp: July 31, 2016, 10:04:22 am
content: Plus it's easier for people on the ground to track them.

author: TheAmmoniacal
author_rank: Unknown
timestamp: July 31, 2016, 10:07:38 am
content: Quote from: German_EE on July 31, 2016, 10:04:22 amThat's probably the main reason in this case, people on the ground might be providing maneuver/navigation instructions.

author: BradC
author_rank: Super Contributor
timestamp: July 31, 2016, 11:01:50 am
content: That wa so cool, even my wife watched it twice.

author: German_EE
author_rank: Super Contributor
timestamp: July 31, 2016, 11:09:03 am
content: "That's probably the main reason in this case, people on the ground might be providing manoeuvr/navigation instructions."Left a bit, back a bit.SPLAT!!Oooops, my bad

author: Assafl
author_rank: Frequent Contributor
timestamp: July 31, 2016, 12:58:48 pm
content: Quote from: EEVblog on July 31, 2016, 09:35:46 amDon't have to miscalculate. Do it 10 times and eventually the wind will change mid-stunt....As usual it is a question of level of exposure to the risk.

author: zapta
author_rank: Super Contributor
timestamp: July 31, 2016, 01:06:16 pm
content: One report I read says that he planned to jump without a parachute but was forced to carry one which made the trick even more dangerous.

author: timb
author_rank: Super Contributor
timestamp: July 31, 2016, 01:30:59 pm
content: Quote from: zapta on July 31, 2016, 01:06:16 pmI watched it live and here's the story on that:Before he got on the plane, he was "told" that he "had" to wear one, however just before he reached the 25,000ft jump altitude, he "decided" that he "wouldn't" wear it, and jumped without. (I put those words in quotes because I find it very dubious. Who said he had to wear it? The lawyers? Who's lawyers? Stride Gum? Fox? Personally, I think it was just a bit of drama to hype the jump.)

author: Jwalling
author_rank: Unknown
timestamp: July 31, 2016, 01:33:57 pm
content: Quote from: TheAmmoniacal on July 31, 2016, 10:02:54 amThat makes sense. I was thinking it might have been some sort of turbulence effect.Jay

author: rx8pilot
author_rank: Super Contributor
timestamp: July 31, 2016, 02:07:16 pm
content: If I did survive, my wife would kill me shortly after.Sent from my horrible mobile....

author: albert22
author_rank: Regular Contributor
timestamp: July 31, 2016, 04:29:21 pm
content: The linked video was removed by copyright issues, but it is still on youtube,Although a very dangerous stunt, it is no so foolish as it looks . It seems that he jumps with 3 support guys which can assist/rescue him if he decides to abort. Assuming that the video is uncut, the support team open their parachutes leaving Aikins by himself just 16 seconds before he hits the net. By that time Aikins should be pretty sure that will hit the net. Taking account terminal velocity the "decision altitude" can be calculated.IMO he was very far from the center of the net, leaving him, what? 1/4 security margin ?

author: zapta
author_rank: Super Contributor
timestamp: July 31, 2016, 07:35:54 pm
content: Quote from: rx8pilot on July 31, 2016, 02:07:16 pmOr ask you to try again.

author: SeanB
author_rank: Super Contributor
timestamp: July 31, 2016, 08:19:59 pm
content: Quote from: Wytnucls on July 31, 2016, 09:34:11 amThat was my father's tale as well. He was a pilot on a bombing run, flying over Lake Constance, and the last he remembered was the aircraft on fire, him telling his guys to bail out, and his parachute being on fire. Till he died he still had the massive scar on his back, and the shrapnel embedded throughout his body.

author: ez24
author_rank: Super Contributor
timestamp: July 31, 2016, 08:21:35 pm
content: Quote from: albert22 on July 31, 2016, 04:29:21 pmHere is a YT link. OP you should change the link in your first post to this one or a better one. When I clicked on it, I got a 4 min commercial from Arrow.com that was entertaining (dev boards). (Google remembers my last search (on dev boards))

author: Fred27
author_rank: Unknown
timestamp: July 31, 2016, 10:44:26 pm
content: He's not the first guy to jump out of a plane without a parachute. Remember this from Travis Pastrana?https://youtu.be/KRLzvPioKG0

author: strangersound
author_rank: Regular Contributor
timestamp: August 01, 2016, 12:32:30 am
content: Quote from: Fred27 on July 31, 2016, 10:44:26 pmWonder how much Red Bull paid him for that?

author: SkyMaster
author_rank: Frequent Contributor
timestamp: August 01, 2016, 02:12:31 am
content: Quote from: albert22 on July 31, 2016, 04:29:21 pmHitting a bird at low altitude was probably the biggest risk, that could have sent him off target; that would have hurt

author: zapta
author_rank: Super Contributor
timestamp: August 01, 2016, 02:35:53 am
content: Quote from: timb on July 31, 2016, 01:30:59 pmIIRC, it was due to union rules. The viddeographers are not allowed to film actors that don't obey the actor guild rules or something like that.

author: timb
author_rank: Super Contributor
timestamp: August 01, 2016, 10:46:26 am
content: Quote from: zapta on August 01, 2016, 02:35:53 amBut, he's not an actor.. He's a stuntman, right?You know, when they initially said he had to wear a parachute, I kind of lost interest, I mean, the whole reason it's interesting is precisely because he wasn't wearing one. It would be like someone tight rope walking between two skyscrapers, only he's wearing a harness clipped to a safety line, in case he falls.Speaking of which, I wonder what sort of time delay they had the live broadcast on, incase he missed?

author: StuUK
author_rank: Frequent Contributor
timestamp: August 01, 2016, 11:52:24 am
content: Quote from: timb on August 01, 2016, 10:46:26 amStuntmen are still members of the SAG.

author: timb
author_rank: Super Contributor
timestamp: August 01, 2016, 11:54:42 am
content: Quote from: StuUK on August 01, 2016, 11:52:24 amLearn something new every day! I always assumed they had their own Union, specific to stunt people.

author: StuUK
author_rank: Frequent Contributor
timestamp: August 01, 2016, 12:04:00 pm
content: Quote from: timb on August 01, 2016, 11:54:42 amNo and in fact it's pretty much closed shop, you need to be a member to get work.