Any idea how it compares to the hydraulic computer designed for the Pratt & Whitney J58 engine used on the SR-71 Blackbird? I saw this video (linked below) wher

Any idea how it compares to the hydraulic computer designed for the Pratt & Whitney J58 engine used on the SR-71 Blackbird? I saw this video (linked below) wherein a test engineer talked about the engine design. He touched a bit on the hydraulic computer (at the 6:50 mark), and I thought it was ingenious and fascinating. https://youtu.be/MJrXUh0eZjw https://youtu.be/MJrXUh0eZjw