Name the countries that house a manned space program. In order of arrival in space, USSR/Russian Federation, United States of America, People’s Republic of China. And maybe one day, Denmark. OK, not the Danish government. But that doesn’t stop the country having a manned space program, in the form of Copenhagen Suborbitals. As the tagline on their website has it: “We’re 50 geeks building and flying our own rockets. One of us will fly into space“. If that doesn’t catch the attention of Hackaday readers, nothing will.
For their rocket testing they need a lot of video feeds, and for that they use cheap Chinese GoPro clones. The problem with these (and we suspect many other cameras) is that when subjected to the temperature and vibration of being strapped to a rocket, they cease to work. And since even nonprofit spaceflight engineers are experts at solving problems, they’ve ruggedized the cameras to protect them from vibration and provide adequate heatsinking.
The heat issue is addressed by removing the camera case and attaching its metal chassis directly to a heatsink that forms the end of an extruded aluminium case. Vibration was causing the camera SD cards to come loose, so these are soldered into their sockets. Power is provided by a pair of 18650 cells with a switching regulator to provide internal power, and another to allow the unit to be charged from a wide range of input voltages. A PCB houses both the regulators and sockets for cable distribution. There is even a socket on top of the case to allow a small monitor to be mounted as a viewfinder. Along the way they’ve created a ruggedized camera that we think could have many applications far beyond rocket testing. Maybe they should sell kits!
We’ve covered Copenhagen Suborbitals before quite a few times, from their earliest news back in 2010, through a look at their liquid-fueled engine, to a recent successful rocket launch. We want to eventually report on this project achieving its aim.
Thanks [Morten] for the tip.
Copenhagen Suborbitals just launched their latest amateur liquid fuel rocket. Why? Because they want to strap someone to a bigger amateur liquid fuel rocket and launch them into space.
We’ve covered them before, but it’s been a while. While they make a big deal of being amateurs, they are the least amateurish amateurs we’ve come across. We’ll forgive a lot as long as they keep making great videos about their projects. Or posting great pictures of the internals of their rockets.
The Nexø I rocket they recently launched claims to be the first guided, amateur, liquid-fueled rocket. There is a nice post on the guidance system. It was launched from a custom built barge off the shore of Denmark, which allows them to escape quite a few legal hurdles around the launch. The rocket flew beautifully. That is, it went only away from the ground; no other directions. Also, it didn’t explode, which is a lot to expect from even the biggest players in the field.
Copenhagen Suborbitals continues to do amazing work. Hopefully their next rocket will be even more impressive… for amateurs, that is.
Last April, we caught wind of a very impressive rocket engine being built by Copenhagen Suborbitals. That engine was on the test pad this weekend, and the video is incredible (skip to 20:30 for the actual test). The Copenhagen Suborbitals team pulled off a successful test firing of their 65 kilo Newton alcohol and liquid Oxygen-fueled rocket.
When last we saw the TM65 engine, it was sitting on the design floor of the Copenhagen Suborbitals workspace. The plan was to fire the engine using alcohol fuel and LOX pressurized by Helium, but that plan was changed to use Nitrogen as the pressurant. The static test was an immensely successful demonstration of the engine, but unfortunately the chamber pressure (and therefore thrust) was a little low meaning the team will be moving back to Helium for the next test.
Thanks to the very successful test of the TM65, Copenhagen Suborbitals may be launching their HEAT booster later this year possibly carrying their new space capsule. Even if it’s only a crash test dummy that will make the ride into space, we can’t wait for the video of the flight.
Check out a few more (abridged) videos of the TM65 test firing after the break.
Continue reading “Test Firing The Largest Amateur-built Liquid Fuel Rocket Engine”
While we’re reluctant to say it for fear of being misinterpreted, the new liquid fuel rocket engine being built by Copenhagen Suborbitals is one of the most impressive, daring, and nearly the sexiest machine we’ve ever seen. Although the engine hasn’t been fired yet, [Peter Madsen], Chief launch vehicle designer at Copenhagen Suborbitals, gives an amazing 18-minute-long rundown of the function of each and every tank and tube of the TM65 in this video.
When the TM65 engine begins its firing sequence, valves attached to tanks of alcohol and liquid Oxygen are opened. The Oxygen pours directly into an injector manifold that atomizes the liquid in the combustion chamber, while the alcohol makes a much longer trip down to the engine bell, flowing between the double wall of the chamber and nozzle for cooling. Once the alcohol and Oxygen in the combustion chamber ignite, two gigantic tanks of Helium are opened and the gas is forced down to a heat exchanger at the end of the nozzle, increasing the temperature and pressure of the Helium. The Helium is then routed to the tanks, pressurizing them and forcing fuel and oxidizer into the combustion chamber at 40 liters per second. This entire process happens in only eight seconds; after that, the rocket attached to the TM65 will be on its way upward.
We’re not going to say the TM65 is the best engine ever seen on Hackaday; we’ll leave you to decide that. We can’t wait for the video of the test fire to hit the Internet, though.
The Copenhagen Suborbitals are now within one week of their first launch. We looked in on the non-profit and non-secretive space program back in March but we had no idea the group had a frickin’ submarine at their disposal. What you see above is the rocket on its floating launch platform. The submarine will haul it out into the Baltic Sea for launch. There’s not much room in the craft for an astronaut but it will be a horrifying an exhilarating flight. According to the spacecraft page the human payload will be in a half-sitting, half-standing position looking up through an acrylic nose dome. This first launch will not be manned, but once they get through the tests this will be one crazy ride.
Reader [Jacob] tipped us off about a project the aims to make the final frontier open source. The mission of the Copenhagen Suborbitals is to launch a man into space. What they’re not interested in is turning a profit, carrying hazmat or weapons, or keeping what they learn to themselves.
Surprisingly enough, isn’t this the next logical step after hobbyists send cameras into space? This team thinks so and they’ve been hard at work building and testing rockets. With the last round of successful tests behind them, they’ve paved the way for a launch of the first round of the campaign on June first. Da duh daaaah da duh duh da daaaaa