US Patent 11964748 Remote generation of lifting gas

According to one aspect, a system for launching an aerostat may include an inflatable structure defining a volume having a neck, a reactor defining a chamber, a coupling releasably secured in fluid communication between the chamber and the neck, and a drain valve within the volume, the drain valve in a first position away from the neck to receive a lifting gas from the chamber into the volume via the coupling, the drain valve movable from the first position to a second position when the coupling is released from fluid communication between the chamber and the neck, and the drain valve in the second position in sealed engagement with the inflatable structure along the neck to control accumulation of condensate from the lifting gas within the volume.