A filament wound E-glass/epoxy pressure vessel has a diameter of 140 cm, a wall thickness of 6.5 mm and a helical wrap angle of 54.74°. Using a netting analysis and a safety factor of 2, estimate the upper allowable internal pressure in the vessel. Compare this to the upper allowable internal pressure in a vessel of identical dimensions fabricated from 6061 aluminium alloy, whose yield stress is 276 MPa. Use the Maximum Shear Stress criterion for this and comment on your results.