High Pressure Microgravity Combustion (HPMC) Facility, Drople... High Pressure Microgravity Combustion Experiment, HPMC, subjects liquid fuel droplets to high pressures and temperatures to study the ignition process in engine conditions, with a goal of improving fuel efficiency. In this configuration, the experiment is capable of testing droplet combustion at up to 100 atm of pressure, testing the droplet deployment system, which inserts the fuel droplet into the experiment.