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Aviation History
1981
1981 - 1018.PDF
1040 j Timeline ! Elapsed time Event tillflllllllillfllll^^ —00:04 SSME laiiitiOP 00:00 SRB ignition and lift-off 00:24 Wings level after roll pitch manoeuvre 00:32 SSMEs »hro!:le from 10C to 65 per 00:53 Maximum dynamic pressure '•• • \ -:;• v^f'i'...M ! C0:59 SSMEs throttle from 65 to 130 per FLIGHT International, II April 1981 iftSill 05:09 C2.25 isipffe iSpii ^^tiilfcli sfi $0$$$i SSME - e par at ion cfosecMoop guidance on of Flash-evaporator hrott'ing limits ecceiera SS8MK throttled to 65 per cent 08 32 Main engine cut-off 68:36 ET separation C9:04 Columbia makes evasive 10:22 OMS 1T burn + SSME propellant 12:01 OMS 1 burn complete 16:00 Start of SSME vacuum inert 26:00 Ejection-seat sating 36.OQ Finish SSME vacuum inert 44:04 OMS 2 burn *S :1S OMS 2 burn complete 6:2*>» OMS 3 burn 8:21:20 OMS S t-urn tonwrtete 7 .-05:31 OMS « bum 7:06:11 OMS 4 burn complete 53:2S :<W OMS retroflre 53 •.3«:SV OMS retroflre complete 53:5« :*.'•> Entry Interface 54.01:11 :>!wt of clvied-loop guidance 64:02:12 Start of mai temperature region 54;V. :12 End of :"r.ax temperature region 54:15:31 First Tacan acquisition 54:20:47 Deploy pitot-statlc probes 54:21:30 Star; a* terminal-area energy 54:24:20 Manual take-over 54:25:16 Start MLS update 54:25:4S Approach and landing interface 54:26:28 Pra-fUre 64:26:40 Lower undercarriage 54:26:43 Final flare 54:27:43 Touchdown 64:23:2: End ot landing run 54:55:00 Crew leave Columbia Notes (a) The items not in bold are taken from an early Cight plan and may vary by up to a fev. tens of seconds (b) Abbreviations: control system 'RCS*. aur.;!:(«rv power unit (APU), microwave landing system (MLS). made by the R'CS to take Columbia out of the plane of the ET's trajec tory—it may also help the crew see the ET before they make their first orbital manoeuvring system (OMS) burn. Like the SRBs, the ET begins a parabolic trajectory towards Earth, but there are no plans to recover it. The ET is almost 120km high and travelling at about 26,700km/hr when it leaves Columbia, so that it begins to disintegrate and burn up when it enters the atmosphere. Nasa estimates that ET debris will hit an area of the Indian Ocean that is 3,900km long, 115km wide and centred about 19,460km downrange from KSC. The original plan for the first The first Space Shuttle flight will be like this. The numbers in parenthesis are height, speed and distance downrange I Lift-off from the Kennedy Space Centre, Florida 2 SRB separation (49-7km, 4,625kmjhr, 48km) 3 Main engine cut-off (Il8-5km, 26,7l5km/hr, 1,363km) 4 ET separation 1187km, 26,7IOkmlhr, 1,472km) 5 OMS I burn 6 CMS 2 turn 7 OMS 3 burn 8 OMS 4 burn 9 Operation in 280km-high circular orbit 10 OMS retroflre (282km, 26,498km/hr, 20,865km) II Entry interface (121 9km, 26,500kmlhr, 7,972km) 12 Touchc'cwn at Edwards AF6, (346kmjhr) Lancaster • Columbia flight path Lakebed • Main roads Normal "flight Above Young and Crippen will attempt to fly this pattern for a landing at Edwards AFB. The numbers in parenthesis are height, speed and distance to the runway. I Start Tacan landing-site update 2 Begin microwave landing system update 3 S-band loss of signal from Goldstone 4 Approach and landing interface (3,048m, 576km/hr, 10-2km, 20° glidepath) 5 Start pre-flare (526m, 576km/hr, 3-2km, 20° glidepoth) 6 Complete pre-flare (41m, 496km/hr, l-lkm, 5" glidepath) 7 Touchdown (346km/hr) Left The path that Columbia will follow to reach orbit I Lift-off 2 Main engine cut-off 3 OMS I burn 4 OMS 2 burn 5 OMS 3 burn (10 orbits later) 6 OMS 4 burn. Planned orbit inclination is 40-3°. 1
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