Instagram Pic of the Week

This and that from the rocket shop

The latest blog post from Copenhagen Suborbitals talks about what’s up next for the Danish rocket team.

A couple of weeks ago we held a debriefing event in our workshop. We went through a detailed analysis of the launch of Nexø I, and we told about what went well, what went wrong, what we learned and what we need to improve and do better. Around 50 guests visited at Refshale island that Sunday. Thank you very much for attending. It’s always nice to meet and talk to our Copenhagen Suborbital supporters.

Nexo II is coming together set for a May launch next year

The next rocket to be launched above the Baltic Sea will be Nexø II. We are already into the build process, and anticipate to have completed the rocket in time for a May campaign, just as the weather conditions becomes acceptable for launch.
When we had parts fabricated for Nexø I, we ordered two complete sets. This means that major parts of Nexø II are already preassembled. There are however still some parts that needs to be fabricated during fall.

And of interest is the work on the BPM-100 rocket engine, this engine will be 100kN of thrust and power the manned rocket, ground tests next summer!!

The BPM-5 engine and the Nexø rocket both have a size suitable for testing different elements of a rocket launch. But as you know, our ultimate goal is to launch a human into space, and that isn’t doable with a nexø-sized rocket. Thus we need to scale up to a larger engine and larger rockets. Our engine group is busy doing calculations for a BPM-100 engine. Our goal is to have it ready for test next summer. This will require – apart from building the engine – that we find a suitable test site for a 100 kN rocket engine.

Read the full update here.

89mm Sugar Shot to Space ‘M’ impulse sugar motor test two at FAR

Video Caption: The second static test of an 89mm ‘M’ impulse KNSB sugar motor at the FAR site in the Mojave Desert of California for the Sugar Shot to Space project. (Friends of Amateur Rocketry dot org and on facebook)

Patently Obvious

Brittish Reaction Research continues down the road of a tube bundled rocket engine, in this update, finding a patent from 1932 describing the tube bundled process, although for the production of power, not a rocket engine.

My internet research frequently involves trawling through old patent documents. These often provide a wealth of information, and I’d like to share some of this with you now.

Great Britain patent 376,974 was applied for in August 1931 by the Swiss engineering firm Brown Boveri. Granted in August 1932, it has as it’s object “Improvements in and Relating to Combustion Chambers”.

This is one of the earliest references I can find depicting a combustion chamber made from tubular elements to allow a coolant to be circulated through.

Continue reading the full update here.

Instagram Pic of the Week

Hard Starts

Something different, a recent video from Interstellar Technologies Inc, shows one of their liquid fuelled rocket engines having a hard start. Try and spot the chamber exiting!

A hard start refers to the tendency in liquid bipropellant engines to get very high pressure spikes during ignition. From Space Propulsion Analysis and Design.