'B' fuel pump housing for V2 rocket engine turbopump showing cast and machined surfaces - some machined areas with obvious specular reflections. Of note are the rarely seen machined contact points on the integral support brackets and the larger areas in two locations in the ring of double ended bolt fixing holes seen at 12 and 6 o'clock. These areas allowed two 'push' screws to be threaded into corresponding locations in the face plate. These could then be screwed down to provide a pushing force to remove the face plate from the main housing seat. This retraction system was required owing to the very tight fit of the face plate due to the narrow 'piston fit' tolerances and the vacuum effect of a soft gasket that was employed between the faces. 3D model by Ray Matter
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