Arrangement with a nacelle and an instrument bar

1. An arrangement, comprising:

a nacelle;

an instrument bar; and

a rotational axis,

wherein the instrument bar is arranged on top of the nacelle,

wherein the rotational axis interacts with the nacelle and the instrument bar,

wherein the rotational axis is constructed and arranged such that the instrument bar pivots between a first position and a second position in reference to the top side of the nacelle,

wherein the instrument bar projects above the top side of the nacelle when locked in the first position, while the instruments are operated, and

wherein the instrument bar is locked close to the top side of the nacelle in the second position to allow access to the instruments.

2. The arrangement according to claim 1 , where the rotational axis is arranged close to the rear side of the nacelle.

3. The arrangement according to claim 1 , wherein the instrument bar and the nacelle are connected by flexible tubes, the flexible tubes being used for a transfer of signals between the instrument bar and the nacelle.

4. The arrangement according to claim 2 , wherein the instrument bar and the nacelle are connected by flexible tubes, the flexible tubes being used for a transfer of signals between the instrument bar and the nacelle.

5. The arrangement according to claim 1 , wherein an electrical or a pneumatic or a hydraulic motor system is arranged at the instrument bar to change a position of the instrument bar.

6. The arrangement according to claim 1 , wherein an electrical or a pneumatic or a hydraulic motor system is arranged at the nacelle to change a position of the instrument bar.

7. The arrangement according to claim 1 , wherein an electrical or a pneumatic or a hydraulic motor system is arranged at the instrument bar and the nacelle to change a position of the instrument bar.

8. An arrangement, comprising:

a nacelle;

an instrument bar; and

a rotational axis,

wherein the instrument bar is arranged on top of the nacelle,

wherein the rotational axis is constructed and arranged such that the instrument bar pivots between a first position and a second position in reference to the top side of the nacelle,

wherein the instrument bar projects above the top side of the nacelle when locked in the first position, while the instruments are operated,

wherein the instrument bar is locked close to the top side of the nacelle in the second position to allow access to the instruments,

wherein a second rotational axis interacts with

a radiator, the instrument bar and the nacelle,

wherein the radiator is constructed such that heat is transferred from the nacelle to an environment,

wherein the second rotational axis is constructed and arranged such that the radiator and the instrument bar pivot between a first radiator-position and a second radiator-position,

wherein the radiator and the instrument bar project above the nacelle in the first radiator-position, while the radiator is used to transfer heat from the nacelle to the environment and when the instruments are in operation, and

wherein the radiator and the instrument bar are close to the rear side of the nacelle in the second radiator-position in order to achieve a minimum height of a component which contains the nacelle, the radiator and the instrument bar.

9. The arrangement according to claim 8 , wherein the second rotational axis is an integrated part of the radiator and wherein the second rotational axis is connected to the nacelle.