Contraction area ratio (the ratio of 6:1 where it cools the air.

BORON-EPOXY REINFORCED ORBITER/EXTERNAL TANK ATTACHMENT INTERFACE Figure 3-15.— Aft fuselage shell structure. LOW-PRESSURE-TURBOPUMP SUPPORT UPPER THRUST SHELF LOWER THRUST SHELF LOWER THRUST SHELF LOWER THRUST SHELF * DIFFUSION-BONDED TITANIUM е BORON-EPOXY REINFORCED ORBITER/EXTERNAL TANK ATTACHMENT INTERFACE Figure 3-15.— Aft fuselage thrust structure. ORIGINAL PAGE IS OF POOR.