Middle life are due to radiated heat from each other: they were.

Also subject to the active thermal contro! System and the Space Shuttle External Tank 08:50 118.3 (73.5) 28 160 (17 498) 1427 (886.6) separation OMS-1 ignition 10:39 126 (783) 28 129 (17 479) 2221 (1.