A Vertical Thrust Measurement System for Liquid Rocket Engines with Self Compensation Capability

When measuring the thrust of a liquid propulsion rocket engine, an error occurs due to resistance of the propellant and purge piping, so measures are required to compensate it. In this study, it was developed that a vertical thrust measurement system for liquid rocket engines that increases structural stability using three-point support structures and improves the convenience of measuring system resistance using a self-correction system composed of a pneumatic cylinder and two load cells. In addition, in this study, a performance verification device for TMS was also developed, too. It is a device that simultaneously provides the same simulated thrust to the TMS and a separate load cell so that the two values can be compared. Through this, it was confirmed that the TMS in this study has measurement errors within 0.3%.