Copenhagen Suborbitals @copsub.bsky.social · 11/10/2026The capsule is a pressure vessel that happens to have a person inside it. One atmosphere on the inside, nothing on the outside, and a wall that has to hold that difference without complaint. 031
Copenhagen Suborbitals @copsub.bsky.social · 07/10/2026"Boy Scouts on steroids" That’s how one of our guests described us - we’ll take it! We are 100% crowdfunded and 100% volunteer-run. When you book our tour, you are stepping into a working workshop where real people are building rockets. Book your visit: bit.ly/3kLX7SK 020
Copenhagen Suborbitals @copsub.bsky.social · 06/10/2026Buying the part is faster, until the lead time comes back as 40 weeks. Off the shelf hardware is qualified, documented and someone else's problem when it fails. 022
Copenhagen Suborbitals @copsub.bsky.social · 02/10/2026Everything we have said so far is true for a satellite. Now put a person in it. Back us: bit.ly/4rtFgBZ 020
Copenhagen Suborbitals @copsub.bsky.social · 28/09/2026Every safety factor is mass, and every kilo of mass is altitude you do not get. On an uncrewed vehicle you can argue the margin down and accept that sometimes you lose the rocket. 001
Copenhagen Suborbitals @copsub.bsky.social · 24/09/2026A rocket tank has to be strong enough to survive the flight and light enough to make the flight worth taking. Those two requirements pull in opposite directions on every single millimetre of wall. 010
Copenhagen Suborbitals @copsub.bsky.social · 23/09/2026Our rocket "factory" is open for visits every weekend. You can watch our Spica rocket take shape and hear about all the success and failures from our previous tests and launches. Like the time this engine came apart during a static fire. 🚀Dates & booking: bit.ly/3kLX7SK 021
Copenhagen Suborbitals @copsub.bsky.social · 21/09/2026"Wings look like the future. We are not building wings. A spaceplane gives you a gentle return and a runway at the end of it, which is genuinely better for the person inside." 011
Copenhagen Suborbitals @copsub.bsky.social · 20/09/2026Why is it taking so long? Nobody sells the tools we need, so before we can build the rocket we have to build the machines that build it. This welding robot took years, and it exists because HEAT-2X taught us what hand-built gets you eventually. youtu.be/6V5lNKQXnB8 100
Copenhagen Suborbitals @copsub.bsky.social · 18/09/2026About a minute after liftoff, the air is doing its best to tear the rocket apart. Speed rises faster than the atmosphere thins, so there is a moment where aerodynamic load peaks and the structure has to be sized for it. 011
Copenhagen Suborbitals @copsub.bsky.social · 16/09/2026Try our flown space capsule on for size by taking a tour of our rocket "factory". 🚀 We host public tours every weekend. See our rocket production in action and hear all the success and failures of a crowdfunded space program. Dates and booking. 👉https://bit.ly/3kLX7SK 021
Copenhagen Suborbitals @copsub.bsky.social · 15/09/2026Confidence is bought in units of time, and we have a finite number of evenings. Each additional test cycle is weeks of build, weeks of waiting for parts, and a weekend at the test site. bit.ly/4xmNnSm 011
Copenhagen Suborbitals @copsub.bsky.social · 14/09/2026Mission log: Draw complete. Winner identified. Email dispatched. If you're part of the Mission Crew — your inbox may require attention. Not in the crew yet? This could be you next month. www.copsub.com/support-us 🚀 000
Copenhagen Suborbitals @copsub.bsky.social · 13/09/2026You can't test a rocket flight. You can only fly one. Every subsystem gets tested on its own, on the ground, over and over. 001
Copenhagen Suborbitals @copsub.bsky.social · 10/09/2026We launch from a platform in the Baltic. That is the safe and the difficult option at the same time. Nothing we fly passes over anybody, which is the single biggest safety argument available to an amateur program. 011
Copenhagen Suborbitals @copsub.bsky.social · 09/09/2026Did you know we are open for visits at our HAB (Horizontal Assembly Building)? It's where all our rocket production happens. Sometimes you get to play with our prototype gizmos! Just like Emma and Francisco here 😊 Dates and booking: bit.ly/3kLX7SK 021
Copenhagen Suborbitals @copsub.bsky.social · 06/09/2026A thousand parts, each 99.9% reliable, gives you a 37% chance of a good flight. Almost everything on a rocket is wired in series, so one failure is the whole failure. bit.ly/4gEOdDv 011
Copenhagen Suborbitals @copsub.bsky.social · 05/09/2026We built a deliberately simple engine to test our unnecessarily complex test stand. BPM-17 fires this autumn. If it works, we light the real engine after that. If not, spreadsheets. 🚀 bit.ly/4ymgkia 021
Copenhagen Suborbitals @copsub.bsky.social · 02/09/2026There’s a moment on every tour: Someone sits in the capsule, and the workshop goes quiet. Then you hear: “wow!” Sitting there makes space feel real. It’s not a replica. Real welds. Real scratches. Space becomes real when it gets personal. Book now: bit.ly/3kLX7SK 032
Copenhagen Suborbitals @copsub.bsky.social · 01/09/2026Aluminium or steel is not a materials question. It is a question about who is holding the welding torch. Aluminium saves mass, and mass is altitude, so on paper it wins. bit.ly/4xbCZxG 021
Copenhagen Suborbitals @copsub.bsky.social · 30/08/2026We are not going to orbit. That is not a shortcut, and we should be honest about what it is. Orbit is not about height, it is about speed, and it takes something like 25 times the energy of going straight up and coming straight back down. bit.ly/4htXctw 010
Copenhagen Suborbitals @copsub.bsky.social · 26/08/2026Want to support the development of our crewed Spica rocket and crowdfunded space program while wearing some cool space merch? 🚀 Visit our store here: www.zazzle.co.uk/copsub 011
Copenhagen Suborbitals @copsub.bsky.social · 25/08/2026You can move propellant with pressure or with a pump. Both answers are wrong in different ways. Pressure feeding has almost no moving parts, which is exactly what you want when the people building it have day jobs. bit.ly/4csplxu 021
Copenhagen Suborbitals @copsub.bsky.social · 23/08/2026A rocket is mostly fuel with a thin metal skin wrapped around it. Roughly nine tenths of what stands on the pad is propellant. bit.ly/4xxTVhp 010
Copenhagen Suborbitals @copsub.bsky.social · 20/08/2026The sun is not round here, because 80% of it was behind the moon on 12 August, which leaves a question open. CREW: Randy, our crash test dummy. OBJECTIVE: Is the sun round or flat? LAUNCH WINDOW: At night, so that we avoid the heat. support the mission: bit.ly/3GHsSqz 111
Copenhagen Suborbitals @copsub.bsky.social · 19/08/2026No polished showrooms here—just raw grit and liquid oxygen tanks. 🛠️🚀 Ever wonder what it takes to build a rocket on a volunteer budget? Come see the real work happening on our engine test structures. It's raw, it's authentic, and it's 100% crowdfunded. Book your spot: bit.ly/3kLX7SK 011
Copenhagen Suborbitals @copsub.bsky.social · 18/08/2026Change the number of engines and you have changed the entire rocket. Go with more, smaller engines and each one gets easier to build, easier to test and cheaper to replace, and you can lose one and still have a flight. bit.ly/4wcIRFz 021
Copenhagen Suborbitals @copsub.bsky.social · 16/08/2026Space starts 100 km up. If the road went straight there, you could drive it in an hour. The distance was never the problem. The energy is. bit.ly/3TRnlsm 011
Copenhagen Suborbitals @copsub.bsky.social · 12/08/2026Come visit us. We have rockets! 🚀 Tours every Saturday in Copenhagen. Learn about our road to sending a person to space, see how we build our rockets and spacecraft, and touch them. Pick a date and grab your space capsule seat: bit.ly/3kLX7SK 010
Copenhagen Suborbitals @copsub.bsky.social · 11/08/2026This month's Mission Crew draw winner: Al Taylor, USA 🎉 A Remove Before Flight key ring and a key hanger heading across the Atlantic. Every Mission Crew member is entered automatically: bit.ly/2DrBUfd 000
Copenhagen Suborbitals @copsub.bsky.social · 09/08/2026From next Sunday we take you inside the HAB, the workshop where a rocket lies on its side and people argue about millimetres. Some of it is on fire, most of it is not. Funded by our Mission Crew: bit.ly/4z1YimF 011
Copenhagen Suborbitals @copsub.bsky.social · 08/08/2026Put a person in space with no employees, no billionaire, no safety net. That challenge is what drew them in. Liva and Daniel from the Danish School of Media and Journalism came for the impossible bet and found the people who make it possible. The theme: "Hvo intet vover," nothing ventured. Thank you 021
Copenhagen Suborbitals @copsub.bsky.social · 05/08/2026Fancy a seat in a space capsule and learn about rockets? We still have open spots for this weekend's tour of our rocket shop where you get to touch real rocket hardware. Grab your seat: bit.ly/3kLX7SK Rescue Randy's smile tells you how comfy it is. 😊 121
Copenhagen Suborbitals @copsub.bsky.social · 04/08/2026BPM-17 is nearly built. Welded by hand, turned on a lathe older than most of the team. We are down to the final fitting and assembly. It fires this autumn, and more on the test plan is coming soon. #CopSub #SpaceForEveryone #DIYSpace 041
Copenhagen Suborbitals @copsub.bsky.social · 02/08/2026Mission log: Draw complete. Winner identified. Email dispatched. If you're part of the Mission Crew — your inbox may require attention. Not in the crew yet? This could be you next month. www.copsub.com/support-us 🚀 000
Copenhagen Suborbitals @copsub.bsky.social · 01/08/2026Meet Rescue Randy: Pilot, Test Department. Boasts two rocket flights! He will be the first passenger of our crewed SPICA rocket, gaining the official title of dummy astronaut. Visit www.copsub.com/support-us to help Randy fly your name to space and get his astronaut wings!👨🚀 012
Copenhagen Suborbitals @copsub.bsky.social · 25/07/2026Did you know you have helped support six of our rocket launches so far? This is Smaragd, our second one, from 2012. It had two stages. 🚀🚀 Thank you for letting us share it with you! Learn more about the Smaragd mission on our webpage: bit.ly/2DEUH2u 1256
Copenhagen Suborbitals @copsub.bsky.social · 25/07/2026Liva og Daniel, to dokumentarstuderende fra DMJX, fulgte os en dag, hvor en planlagt faldskærmstest blev aflyst pga. vejret. Vi brugte dagen på en skala droptest af kapslen i stedet. Link: youtu.be/YoAUXecOcug 011
Copenhagen Suborbitals @copsub.bsky.social · 22/07/2026"Boy Scouts on steroids" That’s how one of our guests described us - we’ll take it! We are 100% crowdfunded and 100% volunteer-run. When you book our tour, you are stepping into a working workshop where real people are building rockets. Book your visit: bit.ly/3kLX7SK 021
Copenhagen Suborbitals @copsub.bsky.social · 18/07/2026Did you know you have helped support six of our rocket launches so far? This is HEAT-1X, our first one in 2011. It's the largest flown crowdfunded rocket in the world! Thank you for trusting us! Learn more about the HEAT-1X mission on our webpage: bit.ly/2EMH7JT 010
Copenhagen Suborbitals @copsub.bsky.social · 14/07/2026New video: new design for the lines that stage our main chute's opening (reefing lines) - smoother, less lock-up risk. Full flight, speed + forces per stage. Thanks: Valkyrie Recovery Systems, Copenhagen Trackers, Odense Skydiving Center. YouTube youtu.be/hlNbCI_D4EQ 010
Copenhagen Suborbitals @copsub.bsky.social · 13/07/2026Mission log: Draw complete. Winner identified. Email dispatched. If you're part of the Mission Crew — your inbox may require attention. Not in the crew yet? This could be you next month. www.copsub.com/support-us 🚀 021
Copenhagen Suborbitals @copsub.bsky.social · 11/07/2026Did you know you have helped support six of our rocket launches so far? This is Nexø II, our sixth one in 2018. Our first fully recovered and possibly reusable rocket! Thank you for being part of it! Learn more about the Nexø II mission on our webpage: bit.ly/2Q72xdU 000
Copenhagen Suborbitals @copsub.bsky.social · 08/07/2026Our rocket "factory" is open for visits every weekend. You can watch our Spica rocket take shape and hear about all the success and failures from our previous tests and launches. Like the time this engine came apart during a static fire. 🚀Dates & booking: bit.ly/3kLX7SK 000
Copenhagen Suborbitals @copsub.bsky.social · 07/07/2026Scott is CNC turning a spacer that will fly on a real rocket engine - on his own time, on a donated, decades-old lathe rebuilt by volunteers. No salary. No shortcuts. Just people who believe Denmark can put a human in space. www.copsub.com/support-us 031
Copenhagen Suborbitals @copsub.bsky.social · 04/07/2026Did you know you've helped support six of our rocket launches so far? This is Nexø I, our fifth one from 2016. It proved we could fly a bi liquid, actively guided rocket, thanks to your support. To learn more about this specific mission go to our webpage: bit.ly/2mCQzYw 0225
Copenhagen Suborbitals @copsub.bsky.social · 01/07/2026Try our flown space capsule on for size by taking a tour of our rocket "factory". 🚀 We host public tours every weekend. See our rocket production in action and hear all the success and failures of a crowdfunded space program. Dates and booking. 👉https://bit.ly/3kLX7SK 000
Copenhagen Suborbitals @copsub.bsky.social · 30/06/2026Nozzle: 0. Leftover burning alcohol: 1. Our 3D-printed de Laval nozzle melted during an alcohol-vapour rocket demo while prepping a new talk. Caught it on the bench under controlled conditions - better here than mid-presentation. 000
Copenhagen Suborbitals @copsub.bsky.social · 27/06/2026Did you know you've helped support six of our rocket launches so far? This: Tycho Deep Space, our 3rd one from 2013. It tested a launch escape system on a space capsule, thanks to your support. To learn more about this specific mission go to our webpage: bit.ly/4sZ1HPy 092
Copenhagen Suborbitals @copsub.bsky.social · 27/06/2026POV: 4 people, 1 parachute, 1 plane Meet the test crew: Mads & Mathias on video, Martin jumping, Stenfatt on recovery. Full results coming in a few days (day jobs first — rockets don't pay rent yet) 131