The straight cascade wind tunnel can be used to investigate planar cascades at Mach numbers in the sub- to supersonic range and at engine-relevant Reynolds numbers. Depending on the application, either profile or end wall tests are performed. A row of blades can be installed over a height of 400mm to approximate a theoretically infinite grid. Three independently controllable cooling ducts are available for analysing cooling air problems. The particular advantage of this test rig is its excellent accessibility. This allows the flow to be easily visualised and analysed using sophisticated measurement technology.