DLR STERN - STudent Experimental Rockets program

• #40 by catdlr on 21 Apr, 2023 04:33
• N2ORTH Rocket Launch
  
  
• #41 by Rik ISS-fan on 21 Apr, 2023 16:53
• Congratulations to this launch of HyEnD N2Orth RT1, and setting the European student rocket altitude record to 64km. Good luck with the second launch next week. With the lower inclination (more vertical) launch, you'll likely break your own record again.
• #42 by Rik ISS-fan on 24 Apr, 2023 13:17
• HyEnD also launched the second N₂ORTH rocket today.
  HyEnD: Launch Attempt of 2nd Rocket on Monday!
  The second N2ORTH rocket has a lighter structural mass and more N2O oxidizer. It is also launched more vertically. So it's likely it will reach a higher altitude. 
  
  Liftoff @1.02.40 in this video.
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• #43 by Steven Pietrobon on 26 Apr, 2023 05:28
• Second launch failed at T+20 seconds.
  
  https://hyend.de/index.php/category/n2orth-launch-campaign/
  
  "Yesterday, the 24th of April at 14:10 CEST, we had a successful launch of our second N₂ORTH rocket from Esrange. Unfortunately, the rocket encountered an anomaly which led to a break-up after 20 seconds. Thanks to the telemetry data and the tracking of the rocket, we have a good idea where the rocket components are located, but a recovery has not yet been possible. In consultation with the SSC, we will continue to look for additional ways to complete the recovery to add data to our post-flight analysis."

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• #44 by catdlr on 17 Jun, 2023 09:54
• #45 by catdlr on 29 Jun, 2023 01:53
• N₂ORTH Rocket | Sideward Facing 4K Onboard Videos
  
  

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  Jun 28, 2023
  
  The video was captured with GoPro HERO 8 action cameras in 4K with 60fps located in the avionics section filming sidewards. The rocket features four of these cameras so that a 360° panorama view is possible. Stay tuned for the results of the post-flight analysis in the coming weeks.

  
  
• #46 by catdlr on 08 Jul, 2024 14:45
• Part 1/3
  

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  A few weeks ago, we manufactured four fuel grains to evaluate a potential new solid propellant. These grains are based on the propellant "TM-78," developed by chemist Dr. Siegfried Oeckl, and have been improved in terms of pourability, safety, and regression for larger sustainer engines. Notable modifications include a higher binder ratio, larger sodium nitrate particle size, and the addition of a flexibilizer to prevent propellant cracking. Each grain is composed of 500 grams of the new TM-78HP propellant and will be tested in a small characterization motor at the MPA (Materials Testing Institute) of the University of Stuttgart. Stay tuned for part 2🔥

  
  https://www.youtube.com/shorts/KFIshkOCaPo
  
  Part 2:
  

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  This small solid rocket motor is used to characterize new solid propellants. Using the measured pressure of multiple burns with different throat sizes, one can determine the a and n parameters and thus the regression rate.
  
  The assembly starts by mounting the nozzle flange on the casing. Afterwards the nozzle assembly and propellant grain are inserted. Next, the pertinax bulkhead and ignitor can be placed, special attention is given to the cable as it has to be shorted at all times. Lastly the assembly is finished by screwing on the bulkhead.
  
  This assembly, except for the fuel grain can be reused at least two times, some parts more than 10 times. This allows for quick and easy testing of multiple grains.
  

  
  https://www.youtube.com/shorts/f23goHDEgvo
  
  
  Part 3
  

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  This solid rocket motor was fired to evaluate a newly developed solid fuel at MPA University of Stuttgart. This is one of four tests performed in April. As it is only for fuel evaluation, it doesn't have a proper diverging section, therefore resulting in a short and stubby exhaust.

  
  https://www.youtube.com/shorts/oyxYDCPKTYA