Inflated Membrane Structures on the Ground,in the Air and in Space 215 by high or low pressure.For high pressure closed wall-chambers are used with the pressure probably exeeding 1 bar requiring rein-forced membrane materials.An example is the Festo-building at Stuttgart,see Fig.3.Pressure and manufacturing required a rubber coated Polyester fabric.In the case of low pressure,about 50 mbar,an open wall can be used,whereby the pressure is permanently imposed by a blower,which is capable to erect the structure.See e.g.the temporary Builtair- roof in Barcelona Fig.4.Recently the inflated wall principle was also introduced by Russian reserchers to reentry vehicles for the return from space to earth. Fig.3.Festo-building in Stuttgart [3],permanent Fig.4.Build-Air-building in Barcelona [4],temporaryInflated Membrane Structures on the Ground, in the Air and in Space 215 by high or low pressure. For high pressure closed wall-chambers are used with the pressure probably exeeding 1 bar requiring rein- forced membrane materials. An example is the Festo-building at Stuttgart, see Fig. 3. Pressure and manufacturing required a rubber coated Polyester fabric. In the case of low pressure, about 50 mbar, an open wall can be used, whereby the pressure is permanently imposed by a blower, which is capable to erect the structure. See e.g. the temporary Builtair￾roof in Barcelona Fig. 4. Recently the inflated wall principle was also introduced by Russian reserchers to reentry vehicles for the return from space to earth. Fig. 3. Festo-building in Stuttgart [3], permanent Fig. 4. Build-Air-building in Barcelona [4], temporary