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公开(公告)号：EP0983189A1
公开(公告)日：2000-03-08
申请号：EP98924445.4
申请日：1998-05-27
IPC分类号： B64C27/615 , B64C9/10 , B64C13/50 , B64D39/00
CPC分类号： B64D39/00
摘要： A drogue assembly (10) for in-flight refuelling includes a circumferential array of triangular support arms which carry a drogue parachute (29) which extends circumferentially around their shorter sides. Each support arm is pivoted and mounted on a pivot pin (19) at its apex for pivotal movement in a radial direction. At least alternate ones of the support arms carry leaf springs which extend into pockets (51) formed in the drogue parachute (29). The leaf springs act on the drogue parachute (29) in opposition to air pressure loading on it in flight so that it tends to increase the chord angle of the drogue parachute (29) from the leading edge. Hence the effective area of the drogue parachute in flight is varied automatically above a certain predetermined minimum which depends on the dimensions of the trailing edge so it is reduced as air speed is increased and vice versa.
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公开(公告)号：EP0983189B1
公开(公告)日：2002-01-02
申请号：EP98924445.4
申请日：1998-05-27
IPC分类号： B64C27/615 , B64C9/10 , B64C13/50 , B64D39/00
CPC分类号： B64D39/00
摘要： A drogue assembly (10) for in-flight refuelling includes a circumferential array of triangular support arms which carry a drogue parachute (29) which extends circumferentially around their shorter sides. Each support arm is pivoted and mounted on a pivot pin (19) at its apex for pivotal movement in a radial direction. At least alternate ones of the support arms carry leaf springs which extend into pockets (51) formed in the drogue parachute (29). The leaf springs act on the drogue parachute (29) in opposition to air pressure loading on it in flight so that it tends to increase the chord angle of the drogue parachute (29) from the leading edge. Hence the effective area of the drogue parachute in flight is varied automatically above a certain predetermined minimum which depends on the dimensions of the trailing edge so it is reduced as air speed is increased and vice versa.
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