edit : Apparently it is called an "rod end bearing"
edit 2 : As mentioned in the comments it could even be a Clevis joint.
The place where the green rectangle in your diagram touches the blue rectangle has a ball and socket like joint. This prevents one actuator from blocking the movement due to the other actuator.
Above picture from blog.nasa.gov ...
For most rocket engines the fuel is used as nozzle and chamber coolant, which heats it up. It may enter the combustion chamber as gas or liquid, depending on design. But the LOX is merely pumped to the engine, and enters at storage temperature of 90K, and very much a liquid.
Example: the Space Shuttle SSME:
This LOX is sprayed using various techniques to ...
Just a little calculations on the acceleration for a solar Sail:
The impulse p of a photon of frequency ν, thus of energy hν , thus of wavelength λ = c/ν on the sail is p = hν/c = h/λ
where h is Planck's constant (6.6 10^-34 Joules). To simplify the calculations, assume that the sun does not emit a whole rainbow of colors, but only the yellow-green color (λ =...
This was done for load balancing purposes.
The turbopump arrangement was as follows:
the LOX pump at the top
the fuel pump in the middle
the turbine at the bottom
The fuel was fed from two sides of the pump, and there were also two outlets. In this way, any fluctuation in input or output pressure was balanced, avoiding sideways forces acting on the pump ...