Abstract: A mounting device for mounting electronic components of an unmanned helicopter. A solid base plate has a circumferential outer edge. A connecting module is fixedly attached to the circumferential outer edge. The connecting module is configured to reversibly connect a flexible cover to the base plate.

Abstract: A landing arresting system for vertical take-off and landing aerial vehicles. A landing and take-off platform and at least one vertical take-off and landing locking member have a projecting portion arranged at a lower portion of the vehicle. The landing and take-off platform includes a plurality of individually displaceable rolls, arranged substantially in a horizontal direction, and moveable back and forth, such that the projecting portion of the locking member can be entered, retained and released between two adjacent rolls. A landing and take-off platform for vertical take-off and landing aerial vehicles and a vertical take-off and landing locking member for aerial vehicles.

Abstract: A rotor damper for a tail rotor of a helicopter. A main body of a resilient material is to be arranged between a drive shaft for the tail rotor and a hub on which rotor blades for the tail rotor are coupled. A flange is connected to the main body of the rotor damper. The flange includes an abutment surface for abutting an outer surface of the hub. A tail rotor including the rotor damper.

Abstract: An unmanned aerial vehicle helicopter including a dismountable tail section including a torque compensating rotor. Power transmission from the motor to the torque compensating rotor is accomplished by pulley-and-belt drive arrangements.

Abstract: A landing arresting system for vertical take-off and landing aerial vehicles. A landing and take-off platform and at least one vertical take-off and landing locking member have a projecting portion arranged at a lower portion of the vehicle. The landing and take-off platform includes a plurality of individually displaceable rolls, arranged substantially in a horizontal direction, and moveable back and forth, such that the projecting portion of the locking member can be entered, retained and released between two adjacent rolls. A landing and take-off platform for vertical take-off and landing aerial vehicles and a vertical take-off and landing locking member for aerial vehicles.

Abstract: A main rotor arrangement for an UAV-helicopter. A rotor mast defines a vertical axis of rotation. A hub is for attachment of rotor blades. The hub is mounted to the rotor mast in a tiltable way so as to reduce loads acting on the rotor blades during operation of the UAV-helicopter. A damping assembly is configured to damp the tilting of the hub.

Abstract: A de-icer including a bracket arranged on a structural member and a de-icer module mounted on the bracket. The de-icer module is adjustable arranged on the bracket such that a position of the de-icer module is adjustable in relation to the bracket. Also a fixture and a method of adjusting a position of a de-icer.

Abstract: Helicopters with removable fuel tanks Each fuel tank is a removable fuel tank. Each fuel tank is removable and can safely be stored on ships and aircraft carriers.

Abstract: A mounting device for mounting electronic components of an unmanned helicopter. A solid base plate has a circumferential outer edge. A connecting module is fixedly attached to the circumferential outer edge. The connecting module is configured to reversibly connect a flexible cover to the base plate.

Abstract: An unmanned aerial vehicle helicopter including a dismountable tail section including a torque compensating rotor. Power transmission from the motor to the torque compensating rotor is accomplished by pulley-and-belt drive arrangements.

Abstract: A main rotor arrangement for an UAV-helicopter. A rotor mast defines a vertical axis of rotation. A hub is for attachment of rotor blades. The hub is mounted to the rotor mast in a tiltable way so as to reduce loads acting on the rotor blades during operation of the UAV-helicopter. A damping assembly is configured to damp the tilting of the hub.

Abstract: A rotor damper for a tail rotor of a helicopter. A main body of a resilient material is to be arranged between a drive shaft for the tail rotor and a hub on which rotor blades for the tail rotor are coupled. A flange is connected to the main body of the rotor damper. The flange includes an abutment surface for abutting an outer surface of the hub. A tail rotor including the rotor damper.

Abstract: A de-icer including a bracket arranged on a structural member and a de-icer module mounted on the bracket. The de-icer module is adjustable arranged on the bracket such that a position of the de-icer module is adjustable in relation to the bracket. Also a fixture and a method of adjusting a position of a de-icer.

Abstract: A method for releasably holding two machined articles (1, 2) together in a mutually fixed position comprises lugs (6, 9) with openings having surfaces to be aligned with each other for defining said fixed position with respect to two dimensions and surfaces arranged to bear against each other for defining said position in a third dimension. The method further comprises inserting a tool (20) through the openings of adjacent lugs and pressing them into said alignment and said surfaces to bear under pretension against each other for holding the articles in a mutually fixed position.

Abstract: A device for releasably holding two machine articles (1, 2) together in a mutually fixed position comprises lug portions (6, 9) with openings having surfaces to be aligned with each other for defining said fixed position with respect to two dimensions and surfaces arranged to bear against each other for defining said position in a third dimension. The device further comprises a tool (20) adapted to be introduced through the openings of adjacent lug portions and press them into said alignment and said surfaces to bear under pretension against each other for holding the articles in a mutually fixed position.