• Home
  • Current congress
  • Public Website
  • My papers
  • root
  • browse
  • IAC-08
  • C4
  • 2
  • paper
  • Ariane 5 MPS P250 motor project status

    Paper number

    IAC-08.C4.2.6

    Author

    Mr. Didier Boury, Snecma Propulsion Solide, France

    Coauthor

    Mr. GERMANI TARQUINIO, France

    Coauthor

    Mr. TELARA MARCO, Italy

    Year

    2008

    Abstract

    Within the frame of the ARIANE 5 (A5) launcher ESA program, EUROPROPULSION completed by mid 95 the development of the first stage Solid Rocket Motor (SRM), called MPS P230 meaning ’Moteur à Propergol Solide’ loaded with initially 230 tons and finally 237 tons of propellant. The A5 launcher is boosted by a pair of these motors presenting a diameter of 3 meters and an overall motor length of 27 m. They speed up the 200 tons of the launcher core stage at more than Mach 6 in approximately two minutes. A first batch of evolutions, propellant mass increase to 240 tons – motor inert mass decrease – nozzle redesign to cost, were implemented in the frame of the A5 EVOLUTION program in 2000/2002 leading to a an overall performance increase of 5Since this period preliminary studies aiming to continue to increase the MPS performances have been performed focused mainly on a new increase by 10 tons of the propellant loading of the motor reaching the final value of 250 tons. The new pressure/mass flow rate law is called H20. Basically the evolution is very simple and consists in reducing the bore channel diameter of S2 and S3 segment by approximately 100 mm with also some evolution of the S1 star segment grain to tune the initial thrust shape and complete the mass increase. The new H20 law could generate a new performance increase close to 5

    Abstract document

    IAC-08.C4.2.6.pdf

    Manuscript document

    (absent)