Minutes of D.Eng.RD meeting held at Armstrong Siddeley Motors

Sapphire test position: Sa.7 fatigue failure of three 7th row compressor rotor blades in root serrations. Future programme. Sapphire 6 150-hour modification approval test ok. Reheat development. Sapphire 5 Attempted 25-hour special category test terminated after 5 hours due to severe compressor rotor blade tip foul. Thrust reversal. Sapphire Hastings: withdrawal of engines from aircraft. General development: (g) Request by DOR of a +10% thrust for emergency on fighter aircraft. Flying test beds: AST Lancastrian VM.733 (2 Sa.6 outboard engines); Gloster Meteor WA.820 (two Sa.2 engines); Canberra WD.933 (two Sa.3engines); Canberra (2nd aircraft) two Sa.6R engines. Prototype aircraft: Javelin WD.808 (two Sa.6) 2nd aircraft ; Javelin WD.827 (two Sa.6) rd aircraft; Handley Page HP.80 WB.771 (4 Sa.6) 1st aircraft; Handley Page 2nd aircraft awaiting delivery of engines due March/April 1953; Hawker Hunter WB.202 (Sa.6); English Electric P.1 (two Sa.5); Hawker Hunter (Sa.7). Adder: Disposal instructions for ASA.23. Viper test position: Requirement for two Viper engines (long life) for Provost aircraft provisioned to Armstrong Siddeley Motors. Double Mamba test position. Fairey flight engines for hot weather trials. Future development: 3-stage turbine. Aircraft: Fairey Gannet VR.546; Fairey Gannet (2nd aircraft) VR.557; Fairey Gannet (3rd aircraft) WE.488; Blackburn GR17/45 WB.797. Mamba test position: Armstrong Siddeley Motors.5 Armstrong Siddeley Motors.6. Additional engines for Dakota. SB.6 prototype flight engines. Lancaster SW.342; Dakota KJ.839; Balliol VL.935; SHort SB.6 (M.123.D) 1st aircraft Armstrong Siddeley Motors Mk.3 Sturgeon type engines ASZ.172 and ASZ.173 for initial flying. 2nd aircraft with Armstrong Siddeley Motors Mamba Mk.6 engines. 3rd aircraft with Armstrong Siddeley Motors Mamba Mk.6 engines. Python: Wyvern VW.868 provisioned for Armstrong Siddeley Motors. Rocket: Screamer rocket motor. Requirement for Viper engines and rocket motors for intercepter aircraft. Provision of aircraft for Screamer tests confirmed for delivery to Armstrong Siddeley Motors June 1953. APU operating on rocket propellants Appendix 1: Sapphire. Appendix 2: Python. Appendix 3: Mamba. Appendix 4: Double Mamba. Appendix 5: Adder. Appendix 6: Viper.