Abstract: A device for selective emergency evacuation of persons from a first level to a second level situated above the first level, or to a third level situated below the first level. For evacuation to the second level a stair arrangement is provided. One end of the device is connected to the first level while the other end is displaceable between the second level and the third level or vice versa. For evacuation to the third level, the device is changeable to a slide. The device may provide for emergency evacuation of persons from a first level deck, or passenger deck of a blended wing-body aircraft, selectively to the top, second level of the aircraft, or to the bottom third level of the aircraft.

Abstract: A method and a device for supporting the take-off rotation of an aircraft, which aircraft comprises on each side of the aircraft at least two main landing gear units, arranged one behind the other, which main landing gear units comprising wheels. For supporting the take-off rotation, in at least one rear pair of the main landing gear units the distance between the wheels of these rear main landing gear units, which wheels roll on the ground, and the fuselage, may actively be reduced.

Abstract: A device for selective emergency evacuation of persons from a first level to a second level situated above the first level, or to a third level situated below the first level. For evacuation to the second level a stair arrangement is provided. One end of the device is connected to the first level while the other end is displaceable between the second level and the third level or vice versa. For evacuation to the third level, the device is changeable to a slide. The device may provide for emergency evacuation of persons from a first level deck, or passenger deck of a blended wing-body aircraft, selectively to the top, second level of the aircraft, or to the bottom third level of the aircraft.

Abstract: A method and a device for supporting the take-off rotation of an aircraft, which aircraft comprises on each side of the aircraft at least two main landing gear units, arranged one behind the other, which main landing gear units comprising wheels. For supporting the take-off rotation, in at least one rear pair of the main landing gear units the distance between the wheels of these rear main landing gear units, which wheels roll on the ground, and the fuselage, may actively be reduced.

Abstract: This apparatus relates to anchoring self-supporting tall structures such as asts, towers or the like in a foundation. The structure (2) is supported in the foundation (5) at its lower end on a pivot bearing (10). The weight of the tower is borne on this bearing. The structure is furthermore elastically clamped to the wall of the foundation at a location above the pivot bearing by elastic clamping device (11) operatively interposed between the wall of the foundation (5) and the sides of the tower. The clamping device generally comprises spring damper elements for damping and suppressing vibrations. The spacing between the pivot bearing and the elastic clamping device, and the characteristics of the elastic damping material are selected to lower and suppress resonance frequencies in the structure.