(19)

(11)

EP 2 035 712 A1

(12)

(43) Date of publication: 18.03.2009 Bulletin 2009/12 (21) Application number: 07732575.1 (22) Date of filing: 26.04.2007

(51) International Patent Classification (IPC):  F04D 29/28(2006.01) F04D 29/66(2006.01) (86) International application number: PCT/GB2007/001538 (87) International publication number: WO 2008/001033 (03.01.2008 Gazette 2008/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 30.06.2006 GB 0612993 (71) Applicant: QinetiQ Limited London SW1 6PD (GB)	(72) Inventor: TAYLOR, James, Watt Fife KY11 2XR (GB) (74) Representative: Obee, Robert William  QinetiQ Limited Intellectual Property Malvern Technology Centre St Andrews Road Malvern Worcestershire WR14 3PS Worcestershire WR14 3PS (GB)