Abstract: An air-guiding device for an air-conditioning unit of an at least partially electrically driven vehicle, a method for operating a system, and a vehicle. The air-guiding device comprises at least a first air inlet, a second air inlet, an air outlet, a channel fluidically coupled to the first air inlet, to the second air inlet, and to the air outlet, and at least one valve device. The first air inlet is arranged to allow a fluid flow between an exterior of the vehicle and the channel. The second air inlet is arranged to allow a fluid flow between a technical compartment of the vehicle and the channel. The air outlet is arranged to allow a fluid flow between the channel and the air-conditioning unit. The valve device(s) is arranged such that a fluid flow from the air inlets in the direction of the air outlet can be prevented.

Abstract: An air duct system for passing an air flow emanating from an air outlet to a measurement device for detecting parameter measurement values for at least one parameter of the air flow, includes at least one collecting unit for collecting the air flow emanating from the air outlet. That one collecting unit can be disposed on the air outlet so that a contact surface of the collecting unit encloses at least one outlet opening of the air outlet circumferentially. The collecting unit includes a wall defining a continuous air duct with an inlet end section and an outlet end section.

Abstract: An air duct system for passing an air flow emanating from an air outlet to a measurement device for detecting parameter measurement values for at least one parameter of the air flow, includes at least one collecting unit for collecting the air flow emanating from the air outlet. That one collecting unit can be disposed on the air outlet so that a contact surface of the collecting unit encloses at least one outlet opening of the air outlet circumferentially. The collecting unit includes a wall defining a continuous air duct with an inlet end section and an outlet end section.

Abstract: In order to provide a combustion chamber, in particular for a rocket engine, comprising a combustion area, an inner shell surrounding the combustion area, an outer shell surrounding the inner shell and coolant passages formed between the inner shell and the outer shell, the casing of which has an improved thermal stability and an increased mechanical bearing strength, it is suggested in accordance with the invention that the outer shell be formed from a fibrous ceramic material and the inner shell be formed from a fibrous ceramic material or from graphite.