A drogue assembly for in-flight refuelling

Details A drogue assembly for in-flight refuelling A drogue assembly for in-flight refuelling

B - Operations, Transporting

64

C

B64C 27/615 (2006.01) B64C 9/10 (2006.01) B64C 13/50 (2006.01) B64D 39/00 (2006.01)

Patent

CA 2291729

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.

L'invention concerne un cône de ravitaillement en vol (10) comportant un réseau circulaire de bras de support triangulaires dont les plus petits côtés soutiennent un parachute stabilisateur (29). Au niveau de sa pointe, chaque bras de support est articulé et monté sur un axe d'articulation (19) en vue de pivoter dans un sens radial. Au moins un bras de support sur deux porte des ressorts à lames qui s'étendent en direction de poches (51) formées dans le parachute stabilisateur (29). Ces ressorts à lames agissent sur la parachute stabilisateur (29) en opposition à la pression qu'exerce l'air sur ce dernier lors d'un vol, de manière que cela ait tendance à agrandir l'angle de corde dudit parachute (29) à partir du bord avant. Ainsi, la zone utile du parachute stabilisateur en vol est automatiquement modifiée au dessus d'un certain seuil minimum prédéterminé qui dépend des dimensions du bord arrière et ce, dans le but que cette zone diminue au fur et à mesure que la vitesse augmente et vice versa.

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