Autonomous, Compact, Packaged Inflation and Launch System for High-altitude Balloons

Systems and methods related to deployable hydrogen reactors are described. In some embodiments, a system (e.g., a balloon system) may include a reaction chamber immersed in a body of water. By permitting a flow of water from the body of water into the reaction chamber, a reaction between a reactant and the water may be carried out to produce one or more lifting gases (e.g., hydrogen gas), which can be employed to subsequently inflate and launch the system in an automated fashion.