Abstract: A separable coupling, for a plurality of pressure lines, having a flat interface plate with a plurality of apertures located in an annular configuration and with tubular members being secured to the plate in alignment with each aperture. A plurality of tubular studs are supported in a guide ring in the same configuration as the apertures in the interface plate. The guide ring is slidably supported on a mounting plate with the studs passing through holes in the mounting plate. O-rings are positioned in the ends of the studs which are spring loaded to provide a seal around each of the apertures between each of the studs and the interface plate.

Abstract: A wind tunnel test section having an outer shell member and an inner liner member within the shell member. Bearings are provided between the inner liner and shell member to permit rotation of the inner liner within the shell member. Holes are provided in the inner liner to permit the insertion of probes into the test section. Probe retainer plugs hold the probes in the holes. The probe retainer plugs are replaced by blind plugs for sealing the holes when the probes are removed. Elongated slots are provided in the outer shell so that the probes can be located in different positions in the test section. A drive mechanism is provided for rotating the inner liner within the outer shell.