Abstract:
In some embodiments, an aircraft includes a flying frame having an airframe, a propulsion system attached to the airframe and a flight control system operably associated with the propulsion system wherein, the flying frame has a vertical takeoff and landing mode and a forward flight mode. A pod assembly is selectively attachable to the flying frame such that the flying frame is rotatable about the pod assembly wherein, the pod assembly remains in a generally horizontal attitude during vertical takeoff and landing, forward flight and transitions there between.
Abstract:
A method of wrapping a plurality of mandrels with a composite material can include rotating each mandrel at a rotational speed; translating each mandrel at a translation speed; positioning each mandrel back to back such that an aft face of a preceding mandrel is approximate to a forward face of a trailing mandrel; and sequentially wrapping each mandrel with the composite material in a helical orientation.
Abstract:
An airfoil member can have a root end, a tip end, a leading edge, and a trailing edge. The airfoil member can include an upper skin, a lower skin, and a composite core member having a plurality of cells, an upper surface network of the cells can be bonded to the upper skin, a lower surface network of the cells can be bonded to the lower skin. The composite core can have a septum layer embedded in the cells that form the composite core, the septum layer being configured to provide tailored characteristics of the airfoil member.
Abstract:
A helicopter rotor blade includes a structural composite skin defining a cavity therein; a composite spar disposed within the cavity and adhesively bonded to the skin, a portion of the spar exhibiting a C-shape in cross section; and a foam core disposed within the cavity and adhesively bonded to the skin. The structural composite skin forms an external, closed box structure configured to transmit mechanical loads encountered by the rotor blade.
Abstract:
La presente invencion se refiere a un aspa de rotor de un helicoptero. En una modalidad, el aspa de rotor incluye un cuerpo; y una estera calentadora acomodada en el cuerpo y configurada para suministrar calor al cuerpo. La estera calentadora incluya una primera pluralidad de fibras y una segunda pluralidad de fibras electricamente conectadas con la primera pluralidad de fibras. La primera pluralidad de fibras define un angulo positivo menor que aproximadamente +45 degree con relacion a una primera direccion perpendicular a una direccion longitudinal del cuerpo. La segunda pluralidad de fibras define un angulo negativo mayor que aproximadamente -45 degree con relacion a la primera direccion.
Abstract:
A structural joint includes a first member having a first base portion and a first leg portion. The structural joint further includes a second member having a second base portion and a second base portion. The first base portion and the second base portion are coupled together at an overlapping portion. The first leg portion and the second leg portion form a cavity for structurally coupling to a structural member.