Abstract: Hand luggage locker assembly for use in an aircraft cabin. The assembly includes a shell-like locker, a track mechanism for moveably connecting the locker to an aircraft structure between a closed position and an open position, and a lifting mechanism for relieving the muscle power required for a user to move the locker between the closed position and the open position. The lifting mechanism includes a moveable lifting body which, on one side, is connected to the track mechanism or to the locker and, on its other side, is connected to the aircraft structure, which lifting body is coupled to a pneumatic system. The pneumatic system includes means for supplying an underpressure compared to the pressure in the cabin, control means being provided for at least supplying the underpressure to the lifting body when the locker is to be moved upwards in a controlled manner with the aid of the underpressure as power source.

Abstract: An ignition system for combustion chambers of rocket engines has a first fuel tank for a first fuel constituent and a second fuel tank for a second fuel constituent, both of which are separated from the fuel tanks of the rocket engine. Feed pipes (3, 4) for the respective fuel constituent are arranged between the igniter and a fuel tank.

Abstract: Hand luggage locker assembly for use in an aircraft cabin. The assembly includes a shell-like locker, a track mechanism for moveably connecting the locker to an aircraft structure between a closed position and an open position, and a lifting mechanism for relieving the muscle power required for a user to move the locker between the closed position and the open position. The lifting mechanism includes a moveable lifting body which, on one side, is connected to the track mechanism or to the locker and, on its other side, is connected to the aircraft structure, which lifting body is coupled to a pneumatic system. The pneumatic system includes means for supplying an underpressure compared to the pressure in the cabin, control means being provided for at least supplying the underpressure to the lifting body when the locker is to be moved upwards in a controlled manner with the aid of the underpressure as power source.

Abstract: In order to reduce the noise nuisance caused during operation by rotor blades of a rotor of a wind turbine the rear edge of each blade is irregularly formed. In particular the saw-tooth form with a top angle smaller than about 150.degree. and preferably 10.degree. is found to produce a considerable noise reduction.