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3/13 {underscore]] Crater(Boeing: subsys mgr + 2 CA + 2 HOU) Crater used post-flt several times -87(latest) → led to foam change Ray Gomez → Input = Dimensions of debris Traj ([[technical symbols]]) Used on SRB impact?(go back to analyze what crater would say about SRB impact → if on orbiter) 1999 SWRI testing done in response to 1987 debris damage "area" just Test data for RCC [[?]] eq'ns re-entry - heating ~ [[v3]] [[symbol]] Ballistic coeff = [[Beta]] low Beta ~tile ~[[illegible]] → rapid decel[[?]] heat spike [[left margin]] Bill Ailor, Aerospace (Dir of Ctr for Orb + Debris rentry studies) [[left margin]] (What's ballistic coeff of crew cabin?) no to = ET breakup 42 nmz = magic break-up # (indep of[[symbol]]) obj. survivabilitly: material+shape/size/[?] ★ Al never found; titanium is if piece survives [[symbol]] 100K ft, it will make it to gnd (heating is over)