Aerial refuelling apparatus

1. An adaptor for mounting a refuelling hose and drogue arrangement to a refuelling boom of an aircraft so as to allow selective refuelling by the refuelling boom and the refuelling hose and drogue assembly, the adaptor being arranged to provide fluid communication between the boom and a hose of the hose and drogue arrangement whilst allowing the boom to act also as a refuelling boom independently of the hose and drogue arrangement and being arranged such that the hose is movable with respect to the boom between a position which is suitable for refuelling using the hose and a position which is suitable for refuelling using the boom without using the hose and drogue arrangement, the adaptor comprising:

an actuator arranged to produce a biasing force on the hose, and arranged for affecting movement to adjust the position of the hose in relation to the boom; and

an arm pivotally mounted, at or adjacent one end of the arm, to a distal end of the boom.

2. An adaptor as claimed in claim 1 , in which the biasing force on the hose is arranged to be in a direction to counter the aerodynamic force on the hose and drogue arrangement in flight.

3. An adaptor as claimed in claim 1 , in which the actuator is operable to vary the biasing force.

4. An adaptor as claimed in claim 1 , which is arranged to be attached to the boom at or adjacent a distal end thereof.

5. An adaptor as claimed in claim 1 , comprising a movable arm having a fuel channel.

6. An adaptor as claimed in claim 5 , in which the arm is pivotally mounted, at or adjacent one end of the arm, to the boom.

7. An adaptor as claimed in claim 6 , in which the arm is pivotally mounted, at or adjacent another end of the arm, to the hose.

8. An adaptor as claimed in claim 6 , in which the biasing force is torque applied at the pivotal mount.

9. An adaptor as claimed in claim 8 , in which the actuator comprises a motor for applying torque at the pivotal mounting between the arm and the boom, to move the arm about a pivot of the pivotal mounting.

10. An adaptor as claimed in claim 9 , in which the actuator is operable to apply torque in either direction.

11. An adaptor as claimed in claim 1 , in which the actuator is arranged to retract the hose to take up any slack in the hose when a receiver aircraft makes contact with the drogue.

12. A refuelling apparatus for an aircraft, the apparatus comprising a refuelling boom and an adaptor for mounting a refuelling hose and drogue arrangement to the refuelling boom so as to allow selective refuelling by the refuelling boom and the refuelling hose and drogue assembly, the adaptor being arranged to provide fluid communication between the boom and a hose of the hose and drogue arrangement whilst allowing the boom to also act as a refuelling boom independently of the hose and drogue arrangement and being arranged such that the hose is movable with respect to the boom between a position which is suitable for refuelling using the hose and a position which is suitable for refuelling using the boom without using the hose and drogue arrangement, the adaptor comprising:

an actuator arranged to produce a biasing force on the hose, and arranged for affecting movement to adjust the position of the hose in relation to the boom; and

an arm pivotally mounted, at or adjacent one end of the arm, to a distal end of the boom.

13. A refuelling apparatus as claimed in claim 12 , comprising a control system arranged to control the actuator.

14. A refuelling apparatus as claimed in claim 12 , in which the actuator is arranged to retract the hose to take up any slack in the hose when a receiver aircraft makes contact with the drogue.

15. A refuelling apparatus as claimed in claim 12 , in which the adaptor comprises a moveable arm having a fuel channel, the arm being pivotally mounted, at or adjacent one end of the arm, to the boom and the arm being pivotally mounted, at or adjacent another end of the arm, to the hose, wherein the adaptor is arranged to:

i) move the arm to a first position, below the level of the boom, ready for refuelling using the hose and drogue arrangement;

ii) move the arm forward from the first position to a second position to retract the hose to take up any slack in the hose when a receiver aircraft makes contact with the drogue;

iii) move the arm to a third position, above the level of the boom, for at least one of takeoff and landing; and

iv) move the arm to a fourth position for normal flight whilst not refuelling using the hose and drogue arrangement.

16. An adaptor for mounting a refuelling hose and drogue arrangement to a refuelling boom of an aircraft so as to allow selective refuelling by the refuelling boom and the refuelling hose and drogue arrangement, the adaptor being arranged to provide fluid communication between the boom and a hose of the hose and drogue arrangement and being arranged such that the hose is movable with respect to the boom between a position which is suitable for refuelling using the hose and a position which is suitable for refuelling using the boom without using the hose and drogue arrangement, the adaptor comprising:

an actuator arranged to produce a biasing force on the hose, and arranged for affecting movement to adjust the position of the hose in relation to the boom; and

an arm pivotally mounted, at or adjacent one end of the arm, to a distal end of the boom.

17. A refuelling apparatus for an aircraft, the apparatus comprising a refuelling boom and an adaptor for mounting a refuelling hose and drogue arrangement to the refuelling boom so as to allow selective refuelling by the refuelling boom and the refuelling hose and drogue arrangement, the adaptor being arranged to provide fluid communication between the boom and a hose of the hose and drogue arrangement and being arranged such that the hose is movable with respect to the boom between a position which is suitable for refuelling using the hose and a position which is suitable for refuelling using the boom without using the hose and drogue arrangement, the adaptor comprising:

an actuator arranged to produce a biasing force on the hose, and arranged for affecting movement to adjust the position of the hose in relation to the boom; and

an arm pivotally mounted, at or adjacent one end of the arm, to a distal end of the boom.