DARE Test Composite Chamber Stratos IV Engine

The test was the first for the carbon fibre chamber, saving much-needed weight will enable Stratos IV to fly even higher!

Instagram Pic of the Week

DARE Unveil Stratos III Rocket

This was live streamed, my apologies for not getting that link up in time.
Presentation starts at 7:00min in.

Key points

  • To break the European student altitude record for rocketry before Fall 2017
  • 63 students involved, international and domestic
  • 12 core team positions
  • Goal was to design and build a rocket in 1 year and to fly higher than before
  • Powered by a 15kN hybrid rocket engine, burning Nitrous Oxide and sorbital/paraffin/aluminum fuel for 28 seconds
  • 3D printed titanium nozzle
  • Carbon fibre composite combustion chamber
  • 262lt, 36kg carbon composite Nitrous Oxide tank
  • Space for scientific payloads in nose cone
  • Have capability to Livestream from onboard camera’s
  • ~8m in length and 0.28m diameter
  • 329.4kg MLOW, 104kg empty
  • Will reach Mach 4.5 and an altitude of 80km (although could be between 60-100km)
  • Nose cone will be recovered from ocean

DARE: Stratos II+ Data Analysis

The students of DARE have been running through the data produced by last year’s launch of Stratos II+. The rocket achieved a peak altitude of 21.5km, considerably short of the 50km as estimated by the team. This anomaly was soon found to be due to an inaccurate estimation of the drag in the simulations, as well as a vortex in the nitrous tank being created as the rocket rotated on its ascent which caused the engine to burn gaseous, not liquid Nitrous Oxide, resulting in underperformance on the engine.

The rocket achieved a peak altitude of 21.5km, considerably short of the 50km as estimated by the team, but in doing so breaking the European student altitude record. This anomaly was soon found to be due to an inaccurate estimation of the drag in the simulations, as well as a vortex in the nitrous tank being created as the rocket rotated on its ascent which caused the engine to burn gaseous, not liquid Nitrous Oxide, resulting in underperformance on the engine.

You can continue to read the full flight evaluation here.

Flight video can be found here.

DARE – The Next Step

After launching Stratos II+, the team from Delft Aerospace Rocket Engineering have been moving forward and continuing on with their effort to make a rocket capable of reaching space. As part of that the team are looking to switch to liquid rocket engines and have started the process to move into that area, with a visit and information from Linde.

The team posted the following on Facebook.

The full update can be read here, http://dare.tudelft.nl/2015/10/cryogenic-safety-instructions-by-linde/