A rotor blade rotation control master cylinder assembly for vertical lift aircraft, comprising: a master cylinder configured to be activated by a pressure of a rotor blade rotation control handle of a vertical lift aircraft to move pressurized hydraulic fluid through one or more conduits, and configured to move pressurized fluid into a rotor brake actuator; characterized in that the assembly further comprises: a low pressure relief valve fluidly connected to the master cylinder and configured to transmit hydraulic fluid in response to the hydraulic fluid pressure exceeding a first pressure threshold of the low pressure relief valve; a high pressure relief valve connected in parallel to the master cylinder and the low pressure relief valve, and configured to transmit hydraulic fluid in response to the hydraulic fluid pressure exceeding a second pressure threshold of the high pressure relief valve, the second pressure threshold higher than the first pressure threshold; and an isolation valve connected in series to the master cylinder and the low pressure relief valve, the isolation valve configured to allow the master cylinder to move pressurized hydraulic fluid at a first pressure in response to the isolation valve being open and to move the pressurized hydraulic fluid at a second pressure that is lower than the first pressure in response to the isolation valve being closed. a master cylinder configured to be activated by a pressure of a rotor blade rotation control handle of a vertical lift aircraft to move pressurized hydraulic fluid through one or more conduits, and configured to move pressurized fluid into a rotor brake actuator; characterized in that the assembly further comprises: a low pressure relief valve fluidly connected to the master cylinder and configured to transmit hydraulic fluid in response to the hydraulic fluid pressure exceeding a first pressure threshold of the low pressure relief valve; a high pressure relief valve connected in parallel to the master cylinder and the low pressure relief valve, and configured to transmit hydraulic fluid in response to the hydraulic fluid pressure exceeding a second pressure threshold of the high pressure relief valve, the second pressure threshold higher than the first pressure threshold; and an isolation valve connected in series to the master cylinder and the low pressure relief valve, the isolation valve configured to allow the master cylinder to move pressurized hydraulic fluid at a first pressure in response to the isolation valve being open and to move the pressurized hydraulic fluid at a second pressure that is lower than the first pressure in response to the isolation valve being closed. a low pressure relief valve fluidly connected to the master cylinder and configured to transmit hydraulic fluid in response to the hydraulic fluid pressure exceeding a first pressure threshold of the low pressure relief valve; a high pressure relief valve connected in parallel to the master cylinder and the low pressure relief valve, and configured to transmit hydraulic fluid in response to the hydraulic fluid pressure exceeding a second pressure threshold of the high pressure relief valve, the second pressure threshold higher than the first pressure threshold; and an isolation valve connected in series to the master cylinder and the low pressure relief valve, the isolation valve configured to allow the master cylinder to move pressurized hydraulic fluid at a first pressure in response to the isolation valve being open and to move the pressurized hydraulic fluid at a second pressure that is lower than the first pressure in response to the isolation valve being closed.