Data relating to Flight 170 by H. Lantéri - Astrium - EADS

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2. Launcher L527 (continued) Type-A cryogenic upper stage: The ESC-A 3 rd stage has been developed for the Ariane 5 + ECA version, and is based on the HM7B engine previously used for the 3rd stage of the Ariane 4 launcher. The ESC-A stage comprises: • two tanks containing 14.7 tons propellant (LH2 and LOX), • HM7B engine delivering 6.5 tons thrust in vacuum for a burn time of about 940 s. The HM7B nozzle is swivel-mounted (two axes) for attitude control. As for flight 167, the ESC-A stage incorporates an additional helium sphere for pressurizing the upper stage tanks. The ESC-A delivers the additional energy required to place the payloads into target orbit. This stage also provides a roll control function for the upper composite during the powered flight phase, and orients the payloads ready for separation during the ballistic phase using the SCAR (attitude and roll control system). 6
2. Launcher L527 (continued) ESC-A thrust frame The first fully equipped ESC-A thrust frame was delivered to Astrium GmbH in Bremen on 13 February 2002 Copyright: EADS-ST Ariane 5 ECA launcher in transit to launch pad ZL3 for the launch sequence rehearsal (RSL). © Ds23230ESA/ARIANESPACE/Service optique CSG Type C vehicle equipment bay: The vehicle equipment bay (VEB) is a cylindrical carbon structure mounted on the ESC-A stage. The VEB contains part of the electrical equipment required for the mission (two OBCs, two new definition inertial guidance units, sequencing electronics, electrical power supplies, telemetry equipment with UCTM-D, etc.). Nose fairing: The ogival nose fairing protects the payloads during the atmospheric flight phase (acoustic protection on lift-off and during transsonic flight, and protection against aerothermodynamic flux). A long pattern fairing is used for this mission. It has a height of 17.0 m and a diameter of 5.4 m. The fairing structure includes two half-fairings comprising 10 panels. These sandwich panels have an expanded aluminum honeycomb core and two carbon fiber/resin skins. The fairing is separated from the launcher by two pyrotechnic devices, one horizontal (HSS) and the other vertical (VSS). The vertical device imparts the impulse required for lateral separation of the two half-fairings SYLDA 5 (Ariane 5 Dual Launch SYstem): This is one of the six versions of this 4.6-m internal diameter structure. SYLDA height varies from 4.9 m to 6.4 m (0.3-m increments) to cater for useful payload volumes from 50 m 3 to 65 m 3 . The SYLDA system makes it possible to carry a second main payload inside the fairing. A SYLDA "A" system with a height of 6.4 m will be used for this mission. 7
Page 1 and 2: Kourou February 200 Data relating t
Page 3 and 4: 1. Introduction Flight 170 is the 2
Page 5: 2. Launcher L527 (continued) Compar
Page 9 and 10: 2. Launcher L527 (continued) Flight
Page 11 and 12: 2. Launcher L527 (continued) Phase
Page 13 and 14: 3. Payload SPAINSAT Program and mis
Page 15 and 16: 3. Payload (continued) HOT BIRD 7A
Page 17 and 18: 4. Launch campaign The Ariane 5 mai
Page 19 and 20: 4. Launch campaign (end) Kourou: tr
Page 21 and 22: 6. Final countdown The final countd
Page 23 and 24: 6. Final countdown - Synchronized s
Page 25 and 26: 7. Flight sequence time /H 0 (s) ti
Page 27 and 28: 8. EADS SPACE Transportation and th

Data relating to Flight 170 by H. Lantéri - Astrium - EADS

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