Abstract: Current helium-filled soap bubble (HFSB) machines used for particle tracking velocimetry (PTV) are optimized for lab use, leaving a gap in the market for field-capable HFSB generators. Lab HFSB machines are not designed for transportation and quick setup in the field, nor are the bubbles large enough for large-scale tests. The machine fills this gap by integrating all subcomponents into a portable system. Further, the bubbles generated are enlarged, improving tracking and scaling up the experimental volume on the order of 100 cubic meters. All the required flow controllers, plumbing, and the soap pump are housed in a 2’ x 1’ x 2’ wheeled box, allowing positional adjustment in response to changing field conditions. The machine features a removable, modular 4-nozzle array, enabling easy transport by vehicle to remote testing locations. The nozzle geometry is modeled after existing bubble nozzle research but has been scaled up to an unprecedented size. The performance has been characterized to relate bubble size to exit orifice and air flow rate, achieving bubbles within the 5-12 mm range. 3D printed, swappable nozzle caps allow the user to modify the bubble diameter within seconds. Manual controls enable the user to easily adjust gas ratios while local data recording creates a library of viable settings that accumulate over time. The machine enables, for the first time, researchers and engineers to test full-scale or near-scale aerodynamics in their field environments, able to be transported easily in a passenger car.