 The Three-Bearing Swivel Module has to both support the final hot thrust vectoring nozzle and transmit its thrust loads back to the engine mounts.The "fueldraulic" actuators for the 3BSM use fuel pressurised to 3,500 lbf/in2, rather than hydraulic fluid, to reduce weight and complexity.One actuator travels with the swivel nozzle, moving through 95 degrees while subject to intense heat and vibration.