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A turbine pump assembly has a turbine, a centrifugal pump, and a passive electrical speed control system. The turbine has a peak efficiency at a first speed that is lower than a second speed at which the centrifugal pump is operating at a peak power requirement. A rocket thrust vector control system

A turbine pump assembly has a turbine, a centrifugal pump, and a passive electrical speed control system. The turbine has a peak efficiency at a first speed that is lower than a second speed at which the centrifugal pump is operating at a peak power requirement. A rocket thrust vector control system is also disclosed.

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1. A turbine pump assembly, comprising: a turbine having a peak efficiency at a first speed;a centrifugal pump;a passive electrical speed control system; andthe first speed is lower than a second speed at which the centrifugal pump is operating at a peak power requirement. 2. The turbine pump assemb

1. A turbine pump assembly, comprising: a turbine having a peak efficiency at a first speed;a centrifugal pump;a passive electrical speed control system; andthe first speed is lower than a second speed at which the centrifugal pump is operating at a peak power requirement. 2. The turbine pump assembly of claim 1, wherein a disk of the turbine is configured to deform when a rotational speed of the turbine exceeds the first speed. 3. The turbine pump assembly of claim 1, wherein the turbine drives the centrifugal pump. 4. The turbine pump assembly of claim 1, wherein the turbine and the centrifugal pump rotate about a common shaft. 5. The turbine pump assembly of claim 4, wherein the passive electrical speed control system comprises a generator and a valve control solenoid. 6. The turbine pump assembly of claim 5, wherein the generator is arranged along the shaft between the centrifugal pump and the turbine. 7. The turbine pump assembly of claim 1, wherein the turbine is powered by a propellant provided by a main engine turbo-pump assembly of a vehicle. 8. The turbine pump assembly of claim 7, wherein the propellant is hydrogen gas. 9. The turbine pump assembly of claim 1, wherein the passive electrical speed control system further comprises a valve configured to meter a flow of propellant to the turbine. 10. The turbine pump assembly of claim 9, wherein the passive electrical speed control system further comprises a valve control solenoid configured to exert an axial force on the valve, such that the valve meters the flow of propellant proportional to a speed of the turbine. 11. A rocket thrust vector control system, comprising: an engine nozzle;a turbine pump assembly having a turbine with a peak efficiency at a first speed, a centrifugal pump, and a passive electrical speed control system; andwherein the first speed is lower than a second speed at which the centrifugal pump is operating at a peak power requirement. 12. The rocket thrust vector control system as recited in claim 11, wherein a disk of the turbine is configured to deform when a rotational speed of the turbine exceeds the first speed. 13. The rocket thrust vector control system as recited in claim 11, wherein the turbine drives the centrifugal pump. 14. The rocket thrust vector control system as recited in claim 11, wherein the turbine is powered by a propellant provided by a main engine turbo-pump assembly of a vehicle. 15. The rocket thrust vector control system as recited in claim 11, wherein the passive electrical speed control system, comprises a generator and a valve control solenoid. 16. The turbine pump assembly of claim 2, wherein the disk is configured to twist when a rotational speed of the turbine exceeds the first speed. 17. The turbine pump assembly of claim 1, wherein the turbine has an operating speed between 90,000 rpm and 140,000 rpm. 18. The turbine pump assembly of claim 1, wherein the first speed is 80,000 rpm. 19. The rocket thrust vector control system as recited in claim 12, wherein the disk is configured to twist when a rotational speed of the turbine exceeds the first speed. 20. The rocket thrust vector control system as recited in claim 11, wherein the turbine has an operating speed between 90,000 rpm and 140,000 rpm.