An aircraft cabin includes an upper deck, and a cargo area. The cargo area is configured to accommodate at least one passenger and is situated at a different level than the upper deck. An accessway provides access between the upper deck and the cargo area. The upper deck has, at least locally, a raised floor in the vicinity of the accessway so that at least one part of the cargo area has a ceiling height higher than the ceiling height of the rest of the area cargo.

An aircraft has an aft main cargo cabin with a low deck floor, and a rear access configured to provide access to the aft main cargo cabin from behind the fuselage. The deck floor of the aft main cargo cabin is lower than a first deck floor of a forward main cabin of a forward section of the fuselage. The aft main cargo cabin has a second height that is greater than the first height of the forward main cabin, allowing the aft main cargo cabin to accommodate oversize cargo with larger dimension(s). The aircraft may be built with such an aft main cargo cabin and rear access, or may be a modified aircraft that includes such an aft main cargo cabin and rear access. Related methods of reconfiguring a base aircraft into a modified aircraft having such an aft main cargo cabin and rear access are also disclosed.

An aircraft fuselage for transporting passengers in a lower deck, the fuselage having a longitudinal axis and interior compartment, having an intermediate floor fastened to the fuselage structure, extending through the interior compartment and dividing the interior compartment into an upper deck and a lower deck, having a support device for supporting the intermediate floor on the fuselage structure. The support device is fastened to the intermediate floor and by an opposite end in the lower deck to the fuselage structure. The support device has a concave form and has an energy absorption element such that in a crash of an underside of the fuselage undergoes a defined plastic deformation and absorbs a defined amount of kinetic energy. In a crash, the fuselage structure is, at the underside of the aircraft fuselage, deformed at most to such an extent that a minimum height between a seat surface of passenger seats in the lower deck and the intermediate floor is not undershot.

An aircraft having a fuselage having a pressurized upper space above the floor and a lower space beneath the floor, a wing, a hollow support stay fixed between the lower space level of the fuselage and the wing, an electric motor propeller propulsion system fixed beneath each wing, the output shaft of the motor driving a propeller in rotation, a production system having a fuel cell producing electrical energy supplying the electric motor with electricity via electrical conductors, a hydrogen reservoir fixed in the lower space, and a hydrogen inlet pipe feeding hydrogen from a hydrogen reservoir to the production system, wherein the hydrogen inlet pipe extends through the interior of the support stay. The electrical conductors or the hydrogen pipes pass through the stays on the outside of the fuselage and therefore at a distance from the passengers and the electronic systems of the aircraft.

A double-deck airplane that facilitates passenger embarking/disembarking and cargo loading/unloading operations in order to maximize the number of flight missions carried out in a given time. The floors of its upper and lower decks are planar surfaces extending continuously inside the fuselage in at least the inner space of the fuselage intended for the payload; the lower deck is located at a height from the ground that allows carrying out passenger embarking/disembarking via equipment incorporated in the airplane without any external airport ground equipment; passenger and/or cargo compartments are distributed on the upper and/or lower decks; and the lifting structure is disposed in the airplane in a manner that none of its components crosses the upper and lower decks.

Embodiments of the present invention provide systems and methods for allowing use of what has traditionally been a cargo area of a passenger aircraft to be used as a lower deck passenger cabin. Various modifications to the aircraft are described, as well as various features to be added in order to enhance the passenger experience. For example, there may be provided a lowered technical floor (32), stairs or other passageways (50) provided at both ends of the lower deck cabin, a window replacement technique, an alternative way of storing cabin luggage, or any combination thereof.

A module an aircraft fuselage includes a support device including a lower end for connection to a fuselage structure in a lower deck of the fuselage, an upper end for connection to an intermediate floor in the fuselage, and an energy absorption element between the upper end and the lower end. A wall panel is connected to the support device and extends along a longitudinal axis and a circumferential direction. In case of a defined crash of an underside of the aircraft fuselage, the energy absorption element is configured to undergo a defined plastic deformation and absorb a defined amount of kinetic energy of that a part of the fuselage structure connected to the lower end of the support device. The plastic deformation and amount of absorbed energy are of a magnitude that in case of defined crash, the module is configured where the fuselage structure will, at the underside of the aircraft fuselage, deform no more than a minimum height.

A modular lower lobe passenger rest cabin includes passenger rest compartments oriented longitudinally along the roll axis and laterally along the pitch axis. Partial passenger rest compartments are defined by the modular lower lobe passenger rest cabin such that when two modular lower lobe passenger rest cabins are installed in a cargo deck of an aircraft, the partial passenger rest compartments define a single passenger rest compartment or aisle from space that would otherwise be insufficient for the purpose.

A vehicle passenger cabin has a holding structure having multiple load introduction points, a multiplicity of support structure parts to be attached to the load introduction points, a lower base for delimiting a lower passenger deck, and a multiplicity of furnishing components to be fastened to the support structure parts. The holding structure has laterally on both sides one floor overhang as a lower delimitation of an upper passenger deck, extending from a laterally outer region of the holding structure radially inwards and at a distance vertically from the lower base. The structure parts are at least regionally curved or bent and are connected at an upper end and at a lower end to an upper and a lower load introduction points, respectively. The structure parts have a first receiving surface for receiving one of the furnishing components, which first receiving surface adjoins the floor overhang radially on the inside.

A combined seat/stair arrangement for a multi-deck vehicle, in particular a multi-deck aircraft or spacecraft, include a foldable passenger seat; a stair which is designed to connect an upper deck to a lower deck via a stair hatch and at least one floor flap which movable between a use position of the stair with the stair hatch open and a use position of the foldable passenger seat with the stair hatch closed, wherein, in the use position of the foldable passenger seat, the at least one floor flap closes at least a partial region of the stair hatch, and wherein the floor flap is designed with a seat attachment, to which the foldable passenger seat is attached.