(19)

(11)

EP 2 906 898 A1

(12)

(43) Date of publication: 19.08.2015 Bulletin 2015/34 (21) Application number: 13783616.9 (22) Date of filing: 10.10.2013

(51) International Patent Classification (IPC):  F41A 25/22(2006.01) F41A 27/08(2006.01) F41A 23/50(2006.01) F41F 1/00(2006.01) F41A 23/30(2006.01) F41A 27/12(2006.01) F41A 23/46(2006.01) F41F 1/06(2006.01) F41A 23/32(2006.01) (86) International application number: PCT/GB2013/000424 (87) International publication number: WO 2014/057235 (17.04.2014 Gazette 2014/16)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (30) Priority: 10.10.2012 GB 201218115 13.11.2012 EP 12275174 (71) Applicant: BAE Systems PLC London SW1Y 5AD (GB)	(72) Inventors: DAWSON, Keith Barrow-in-Furness Cumbria LA14 1AF (GB) HERBERT, Frederick Barrow-in-Furness Cumbria LA14 1AF (GB) WEBB, Michael John Barrow-in-Furness Cumbria LA14 1AF (GB) (74) Representative: BAE SYSTEMS plc Group IP Department  Farnborough Aerospace Centre Farnborough Hampshire GU14 6YU Farnborough Aerospace Centre Farnborough Hampshire GU14 6YU (GB)