Livestream of the Nexø 1 rocket launch (the most advanced rocket built by amateurs, ever) - General

Stream is supposed to start at 11:00 CEST (that's UTC +1, the blue zone going through Europe on this site: [URL]http://www.worldtimezone.com/[/URL]), launch at 12.00 CEST if there aren't any delays. Update: Stream is LIVE, launch planned for 13:30 UTC - but I'm gonna guess it'll be delayed a bit more. [video=youtube;5mQ8bz1E6V8]https://www.youtube.com/watch?v=5mQ8bz1E6V8&feature=youtu.be[/video] The Nexø 1 is launched from international waters (ESD139) out from the coast of Bornholm - that is, it's a sea launch from a purpose-built ship, Sputnik. The rocket is expected to get to around 6-10km, but the purpose of this mission is not a height record; it is rather to test all the subsystems that will be able to scale up to the Spica rocket that will eventually launch one from the team into space. Later this summer they will fly Nexø 2, which will include more advanced features like gimballing and DPR, which will help it fly much higher than the Nexø 1. I made a thread that has much more information here: [URL]https://facepunch.com/showthread.php?t=1519856&highlight=[/URL] The livestream hasn't quite started yet, but if you wanna see some more pictures or read up on Copenhagen Suborbitals, just go to [URL="http://www.copsub.dk"]www.copsub.dk[/URL], their [URL="https://www.facebook.com/CopenhagenSuborbitals/"]facebook[/URL] page or [URL="https://twitter.com/copsub"]Twitter[/URL] where you'll also find a bunch of live updates. Until then, here's a single picture showing the rocket on its launch platform: [IMG]https://scontent-arn2-1.xx.fbcdn.net/v/t1.0-9/13709984_1161171613905703_3928245865067355220_n.jpg?oh=9ea75927bafbbbe044292931e23fab7d&oe=582E8099[/IMG]

Swedes won't even know what hit em.

Here's a livestream from TV2 via chopper: [URL]http://play.tv2bornholm.dk/?area=liveTV[/URL] Main stream is supposed to start in a couple of minutes, but let's see. Current liftoff target is 13:25 (in about two hours).

[QUOTE=GoDong-DK;50760817]Here's a livestream from TV2 via chopper: [URL]http://play.tv2bornholm.dk/?area=liveTV[/URL] Main stream is supposed to start in a couple of minutes, but let's see. Current liftoff target is 13:25 (in about two hours).[/QUOTE] Cheers - seems like tech issues with the YT stream!

[QUOTE=Bradyns;50760874]Cheers - seems like tech issues with the YT stream![/QUOTE] Apparently the issue lies with the mosaic view (they typically run two views), and not the entire stream. They're giving it one last try, and if it doesn't work out, they'll just run with the main stream only. After they get the stream up and running, they'll have to go through the pre-flight check list as well. It can be found [URL="http://copenhagensuborbitals.com/flight-plan-nexo/"]here[/URL], if you're interested. Either way, it's gonna be a while before launch. On top of the chopper from TV2, they also have a light plane that'll be taking pictures, presumably video, and help with finding the rocket when it eventually comes down again. Here's a picture from the chopper - shows the launch platform, Sputnik, in the middle, with the mission control and livestream ship, Vostok, in the bottom left corner: [thumb]http://i.imgur.com/qYY3qxM.jpg[/thumb] [editline]23rd July 2016[/editline] Stream is LIVE.

Better than the n.korean rocket program

It should of course be noted that CopSub is a non-profit, volunteer-driven program - so if you'd like to give a donation, you can do so [url=http://copenhagensuborbitals.com/support-us/]here[/url]. The Nexø program has so far cost them about 250000dkk (around $40000), so sadly new streaming equipment isn't that high on their priority list - currently they're running a bunch of 10-year old servers. Anyway, the push for Spica is gonna cost them a lot more, so anything helps really.

[t]http://jesusfuck.me/di/W5CX/16-07-23-21-16-59-copenhagen-suborbitals-nex-i-launch-from-the-bal.png[/t] feels like I'm watching someone play CS

Is the sound gone for anyone else?

[QUOTE=Sheepaay;50761021]Is the sound gone for anyone else?[/QUOTE] Yup, it's pretty annoying. [editline]23rd July 2016[/editline] We're at 2.23 (releasing the clamp on the rocket) on the flight check list now, sound seems to be back. After 2.23, they'll be setting the load cell to null. After that they can start fuelling the rocket. They're go for fuelling ethanol now. Fuelling on hold, problems with telemetry from the rocket. The issue has been fixed now, fuel is loaded. LOX is about to be loaded. [editline]23rd July 2016[/editline] Launch within an hour according to their twitter.

LOX being loaded (a somewhat arduous process due to their budget), we're pretty close to the final GO/NO GO and liftoff. Aaaand the server is rebooting. We're close to launch, though, hopefully we'll get a picture. Update: Feed is back, launch within 10-15 minutes. They're gonna do LOX venting now (I think) to get the right amount in the tank. After that there's a final check, after that they're gonna launch. Feed is down again, hosts are suggesting getting a drink. Seems like it's up again. [editline]23rd July 2016[/editline] Pad getting evacuated, one guy remaining and doing the last checks. Update: Okay, there's a Swedish sail ship fucking up by being in the launch area. Might drag out - with LOX loaded that's a bad sign.

Typical Swedes

lol rekt

That went about as well as my first KSP rocket

I think recovery has gone well

Fuck. [editline]23rd July 2016[/editline] Hard to say what went wrong with the rocket - though it seems like it had a very slow start.

They haven't done an autopsy on the rocket yet, but the preliminary explanation - only from the telemetry to my knowledge - is that too much LOX was loaded on the rocket (a result of the pretty ghetto way of loading it). This results in a smaller gas phase in the tank, which means that pressure drops much too fast. The onboard computer is designed to assume that the fast drop in pressure is due to a faulty sensor, and it'll default to using a look-up table of what the pressure should be. Therefore the rocket thought that the motor was running until it hit the water, despite the fact that it had cut-off much earlier due to insufficient pressure. A side-effect of this is that the rocket didn't deploy its parachute. This also explains the sub-par performance from the rocket motor - the rocket never went faster than 84m/s (and it only got to 1.5km). The silver lining is, of course, that even this is too slow for effective aerodynamic steering, which means that the rocket's guidance system actually worked [I]really[/I] well. It would also make sense to me that a problem such as this would be solved by the next rocket, as it has a DPR system. Excess oxygen in the tank thus won't impact the feed pressure too much. The real problem is of course the LOX loading system - currently they're measuring how much they've loaded by weight, which is really hard to do precisely. On their test stand they have a special flow meter that works at cryogenic temperatures - sadly it is pretty sensitive, and very expensive, so I guess that's why they didn't want to risk it.