Astris (rocket stage)

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Astris
Europa Upper Stage University of Stuttgart.jpg
Astris, the third (upper) stage of the Europa I rocket, on display in Pfaffenwaldring 31 (V 31) on the campus of University of Stuttgart in Vaihingen, Stuttgart, Germany.
Manufacturer ERNO Raumfahrttechnik GmbH
Country of origin Germany
Used on Europa 1 third stage.
General characteristics
Height3.36 m (132 in)
Diameter2.00 m (79 in)
Gross mass3,370 kg (7,430 lb)
Propellant mass2,760 kg (6,080 lb)
Empty mass610 kg (1,340 lb)
Launch history
StatusRetired
Total launches4
Successes
stage only)
0
Failed4
Lower stage
failed
0
First flight1969-07-31
Last flight1971-11-05
Engine details
Powered by1 Astris (rocket engine)
Maximum thrust23.3 kilonewtons (5,200 lbf)
Specific impulse 310 s (3.0 km/s)
Burn time330s
Propellant Aerozine 50 / N2O4

The Astris was an upper stage developed by ERNO Raumfahrttechnik GmbH and MBB as the third stage of the Europa 1 launch vehicle. [1] [2] [3] It was the German contribution to the project and only flew activated four times. The high failure rate of the three and four stage rocket meant that the project was cancelled. [4] [5]

Contents

On November 29, 1968, its inaugural flight, the Astris third stage exploded. [6] [7] On the second attempt on July 1969, the Astris engine failed to start. [6] [7] On the third attempt on June 11, 1970, the stage performed correctly, but the fairing failed to separate. [7] [6]

On November 5, 1971, the Europa II launched from CSG ELA-1, had a mishap due to structural failure of the third stage. [8] [9] After this last failure the project was definitely cancelled. [8]

Details

The stage measured 3.36 m with a diameter of 2 m, and had an empty mass of 610 kg. [4] Propellant (N2O4/Aerozine-50) mass was 2760 kg, and the single Astris engine produced 23.3 kN of thrust. [4]

See also

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References

  1. "Propulsion Systems and Launch Vehicles". Deutsches Museum. Retrieved 2015-07-25.
  2. "Astris engine". www.astronautix.com. Retrieved 2023-10-10.
  3. "Europa". Gunter's Space Page. Retrieved 2023-10-10.
  4. 1 2 3 "Astris". www.astronautix.com. Retrieved 2023-10-10.
  5. Serra, Jean-Jacques. "Europa launchers" . Retrieved 2015-07-25.
  6. 1 2 3 "Europa-1". Gunter's Space Page. Retrieved 2023-10-10.
  7. 1 2 3 "Europa I". www.astronautix.com. Retrieved 2023-10-10.
  8. 1 2 "Europa II". www.astronautix.com. Retrieved 2023-10-10.
  9. "Europa-2". Gunter's Space Page. Retrieved 2023-10-10.