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

34 present including Capt Luby (MoS); Mr Saxton, Mr Slatter Armstrong Siddeley Motors; Air Marshall Sir JN Bootham CS (A). Agenda: Sapphire 662 (612) contract position. 664 (614) Test position. (a) Sa.6 rating Sa.113. (b) Steel compressor rotor blades. 665 (615) Future programme (c) Performance tests with reduced number of 1st row turbine stator vanes. 666 (616) General development: (a) insulation of jet pipes. (b) de-icing. (c) gas starters. Flying test beds: 667 (617) AST Lancaster VM.733; Gloster Meteor WA.820; Canberra WD.933; Canberra 2nd aircraft. Prototype aircraft 671 (622) Gloster F4/48 (twin); Gloster T118D Trainer (twin); Handley Page B35/46 (4 engines); Hawker F3/48; English Electric F23/49 (twin) deliery of first two flight engines February 1953. Adder: 676 (627) Running time to date 1500 hours. 677 (628) Test position: (c) Lancaster FTB. Future programme 678 (629) (b) Despatch A12 and A13 to Australia. 679 (630) Aircraft: (a) 8 engines delivered to Australia. (b) Adder in tail of Mamba Lancaster. Vickers C9 first engine required June 1952. Viper 680 (631) Running time now 173 hours. 681 (632) Test position. 682 (633) Future rogramme: Bristol application for Viper. Viper for Mamba lancaster. 683 (634) Double Mamba: Total running time to date 4883 hours. 684 (635) Test position: (a) 150-hour Type test Troubles being experienced in reduction gear. (b) DM.201; (c) DM.212. (e) Fairey Flight engines. 685 (636) General development: (a) Dowty fuel pumps; (b) Turbo starting (Rotax). 686 (637) Future development: 3-tage turbine. 687 (638) Aircraft: Fairey GR17/45 VR.546; Fairey 2nd aircraft VR.557; 689 (640) Fairey 3rd aircraft WE.488 (3-seater); 690 (641) Blackburn GR17/45 WB.797. 691 (642) Mamba: Running times Armstrong Siddeley Motors.1 to Armstrong Siddeley Motors.4 to date 4016. 692 (643) Test position: 150-hour modification approval test. 693 (644) Aircraft: Lancaster SW.342; Apollo GA IYN; 695 (646) Dakota KJ.839. 696 (647)general development: (a) Fairey Rotodyne; (b) Mamba engine for Short Bros Sturgeon. 697 (648) Python: Running times to date 10,194 hours. 698 (649) Test position: (a) Strengthened front propeller gears; (b) ECU with withdrawable hydraulic stop; (c) twin disc turbine; (d) 3-stage turbine; (e) Turbo starting. 699 (650) aircraft: Lancaster TW.911 awaiting disposal allotment. 700 (651) Wyvern Vp.109; Wyvern VW.867; Wyvern VW.868 provisioned for Armstrong Siddeley Motors; Wyvern VW.882; Lincoln aircraft. Rocket 705 (657) Snarler in Hawker VP.401 awaiting disposal of aircraft; 706 (658) Screamer rocket motor: Avro have now intimated that they will require 8000 lbs thrust at sea level with a probable sub-division of 7200 lbs and 800 lbs. Enquires from Saunders Roe, Fairey, Short Bros, Scottish Aviation, Blackburn, and Westland for the application of the unit. 707 (659) Armstrong Siddeley Motors require Meteor 8 aircraft for Screamer tests. Report on air turbo rocket. New test house and plant. Assisted take-off for bomber aircraft; Armstrong Siddeley Motors have submitted to Avro the provisional proportions of a 30,000 lb thrust unit, and this is under consideration at Avro. Appendix 1: Sapphire 95 AS.Sa.3 to 162 AS.Sa.4. Appensix 2: Python 101 ASp.1 to 116 ASP.3 and 117 ASP.3 to 134 ASP.3. Appendix 3 Mamba 101 AS.Ma.1 to 174 AS.Ma.3. Appendix 4 Double Mamba 201 AS.Ma.D.1 to 214 (AS.Ma.D. Appendix 5 Adder 1 ASA.1 to 25 ASA.1. Appendix Viper 1 ASV.1 to 10 ASV.1