South Kensington Science Museum Mathematics Gallery

I visited the new Mathematics Gallery at the South Kensington Science Museum yesterday. It is a rather interesting gallery with all sorts of computing devices on show. Many will know that the HP 39 Gugnunc is hung from the ceiling in the centre of the gallery. There is a mathematical-looking 3D surface hung behind the aircraft which apparently shows a representation of the airflow behind it. I was puzzled though. I understand airflow in terms of streamlines as they pass around the airframe and behave in a related way as they pass downstream. In this display there is no actual connection between the 3D surface and the Gugnunc, they are simply hung near to each other. Now I must admit that, understandably, biplane aerodynamics was not on the syllabus when I was a student, but I could not credibly see how the two parts of the display related in terms of cause and effect. So I have a question which is have other forumers seen the display and did it make real aerodynamic sense to them?
That confusion aside, full marks to the Science Museum for getting the Gugnunc on public display after such a long time in storage and then at Wroughton.