A hybrid VTOL vehicle having an envelope configured to provide hydrostatic buoyancy, a fuselage attached to the envelope and having at least one pair of wings extending from opposing sides thereof to produce dynamic lift through movement, and a thrust generation device on each wing and configured to rotate with each wing about an axis that is lateral to a longitudinal axis of the envelope to provide vertical takeoff or landing capabilities. Ideally, the envelope provides negative hydrostatic lift to enhance low-speed and on-the-ground stability.

An aircraft thermal management system comprising a high temperature loop and a low temperature loop. The high temperature loop is configured to manage a temperature of a fuel cell stack in a nacelle using a nacelle heat exchanger. The low temperature loop is configured to cool a number of heat loads in a nacelle using a heat capacity of liquid hydrogen.

A system for the thermal management of an external electric power generating nacelle equipping an electrically powered airship, the nacelle comprising electrical generation means implementing at least one turbogenerator contained in a fire containment vessel and provided with an inlet duct for turbine feed air and a flue gas exhaust duct, the system comprising ventilation means for injecting external air into the fire containment vessel, and means for discharging the ventilation air from the fire containment vessel, the means surrounding the flue gas exhaust duct so as to provide a Venturi effect for the outflow energized by the turbine flue gases.

A system for the thermal management of an external electric power generating nacelle equipping an electrically powered airship, the nacelle comprising electrical generation means implementing at least one turbogenerator contained in a fire containment vessel and provided with an inlet duct for turbine feed air and a flue gas exhaust duct, the system comprising ventilation means for injecting external air into the fire containment vessel, and means for discharging the ventilation air from the fire containment vessel, the means surrounding the flue gas exhaust duct so as to provide a Venturi effect for the outflow energized by the turbine flue gases.

An airship comprises a main body having a rigid structure surrounding a plurality of containers for a lighter-than-air gas, a plurality of propeller units mechanically connected to the rigid structure and each comprising one or more electric motors for driving a thrust propeller, and one or more power-generating units for powering the electric motors. The airship also comprises two nacelles symmetrically arranged on either side of the main body and each configured to receive one or more of the power-generating units, each ducted nacelle comprising a mechanical structure connected to the rigid structure of the main body by joint, a fail safe interface, and at least one rod or stay cable between a first point of attachment on the rigid structure of the main body and a second point of attachment on the mechanical structure of the nacelle.

An airship comprises a main body having a rigid structure surrounding a plurality of containers for a lighter-than-air gas, a plurality of propeller units mechanically connected to the rigid structure and each comprising one or more electric motors for driving a thrust propeller, and one or more power-generating units for powering the electric motors. The airship also comprises two nacelles symmetrically arranged on either side of the main body and each configured to receive one or more of the power-generating units, each ducted nacelle comprising a mechanical structure connected to the rigid structure of the main body by joint, a fail safe interface, and at least one rod or stay cable between a first point of attachment on the rigid structure of the main body and a second point of attachment on the mechanical structure of the nacelle.