SATURN OCTOBER28,1911 39) SATPBU 5 LAIJIICB II730330 19 B~ALOATIOI OBOOBT, AS-510, IOB (MASA) 312 p CSCL 22c Onclas 63130 19841 \ SATURWV LAUIICH VEHICLE FLIGHTEVALUATIOII REPORT-AS-S10 APOLLO15 MISSlOW ?RE?ARfDBY ~~HI~116Hl~AlUAllO6WORRl166ROUR N.VOb4.L AERONAUTICS .NO SPACE ADMINISTRATION GEORGEC. MARSHALL SPACEf’tbl CWER MPR-SAT-FE-‘II-2 SATURNV LAUNCHVEHICLE FLIGHTEVALUATION REPORT - AS-510 APOLLOI5 Ml SSION PREPAREDBY SATURN RIGHT EVALUATIONWORKING GROUP . * p r._ : -.* MPR-SAT-FE-71-2 VEHICLE FLIGHT EVALUATION REPORT - AS-510 APOLLO 15 MISSION BY Flight Evaluation Working Group 2 C. Marshall Space Flight Center ABSTRACT I 1o 15 Mission) was launched at 9:34:OD Eastern 1 July 26, 1971, from Kennedy Space Center, Complex 39, Pad A. "The vehicle lifted off on a launch azisrrth of 90 degrees east of north and rolled to a flight azimuth of 80.088 degrees east of north. The launch vehicle successfully placed the manned space- craft in the planned translunar coast mode. The S-IVB/IU impacted the lunar surface within the planned target area. This was the first Apollo Mission to employ the lunar Roving Vehicle (LRV) during Extravehicular Activity (EVA). The performance of the LRV was satisfactory and resulted in extended EVA, and greatly increased the crews lunar exploration capabilities. All Mandatory and Desirable Objectives of this mission for the launch vehicle were accomplished except the precise determination of the lunar impact point. It is expected that this will be accomplished at a later date. No failures, anomalies, or deviations occurred that seriously affected the mission. Any questions or comments Gertaining to the information contained in this report are invited and should be directed to: Director, George C. Marshall Space Fltght Center Huntsville, Alabama 35812 Attention: Chairman, Saturn Flight Evaluation Working Group, S&E-CSE-LA (Phone 205-453-2462) PRECEDINGPAGEBLANKNOT~ TABLE OF CONTENTS Pa* TABLE OF CWLNTS iii SECTION 5 - S-It PlDpUlSloll LIST OF llllJsTnATlm Vi 5.1 f-w 5-1 LIST OF TABLES I 5.2 s-ic Ignltlen Translennt Perhmmco 5-Z ACK)(OYLEO6EMNT xii 5.3 S-IC mslnstage Perfommce ABBREVIATIo)(S xlil 5-3 NlSSloN PLAN rvl 5.4 5zlC EnpIne Shutdan Tmnslrt Perfomce 5-6 FLIW SWIARV rlx 5.5 S-K ftaga Pnlpallant~t s-6 NlSSIo)( OOJECTIVES MC(ll9llSHENT XXV s-IC Pnssurlratlal systm!l FAILURES. RWLIES All0 DEVIATI(wS Xxvi zl66.1 S-IC Fuel Pressurlzatlan 5ystm z; 5.6.2 S-It LOX Pmssurizatlan 5ystam 5-a SECTIOII 1 - lNTRo&JCTlo1 5.7 S-K PnLmat1c Cmtrol PmsuvB 1.1 Pulplm l-l syS- 5-9 1.2 SCOP l-1 5.6 s-IC cutge systas 5-10 SECTIOII 2 - EVENT TlllES 5.9 s-xc Pm SLppresslm system 5-12 2.1 Smy of Events 2-l 5.10 S-IC Hydnullc Systa 5-13 2.2 Varlrblc Tim mnd Cm&d SECTIOW 6 - S-11 PIDpl,UI(II Switch Selector Events 2-l 6.1 6-l SECTIOII 3 - UINol WEMTImS 6.2 5-11 ChlllQln md ruil~ 3.1 S-W 1rens1entPerf0mcr 6-2 3.2 Pmlamch ffllcstona 6.3 s-11 IlrlnsUge hrfommce 6-4 3.3 Comtdoun Events 6.4 6-9 Propellant :ording :*t 1 W-1 Lordlng 6.5 s-11 stag Prqmllnt 3:4:2 LOX Loedlng -t 6-9 3.4.3 L&f LoeYng 6.6 5-11 Plrssurlzrtial 5 OI Cl0 3.5 S-II Insulrtlon 6.6.1 3-11 Fual PI#surlzatan r systm Cl0 Grand Sloport Equlpmt 6.6.2 S-II Lox Pmsurlzatlm sysol Cl2 i-66 1 GmawJ/Vehlclr Interface 3:6:2 ~~fS~lshed6mmd Support 6.7 s-11 Clwlut1c contm1 3-6 Pressure systm Cl6 6.8 5-11 Ikllu InJectlen 5ystm Cl6 SEcTIan 4 - TRUECTORV 6.9 W605uvpressla5ysta 6-16 4.1 S-rY 4-l 6.10 s-11 Hy&ellllc 5ysa c-16 Trejectoy Eveluetlon t-f 1 Ascent Phase t:: SLCTIOW 7 - s-~n~lopusIa 41212 Patilng Olbit Phase 4.2.3 !rjec)lon Phase t:: 7.1 S-W 7-l 4.2.4 Post TLI Phase 4-9 7.2 S-IV6 tlrllldam UU Dull* TranslmtClrFoma for Flrat &NW 7-2 iii \ TABLE OF CONTENTS (CONTINUED) Page Page 7.3 S-IV8 Mainstage Performance SEC'ION 10 - CWTRDL MD SEPARATIOI for First Bum i-2 ID.1 s-v 10-l S-IVB Shutdown Transient 7.4 10.2 S-IC Control Systm Evaluation 10-Z Performance for First Bum 7-6 10.3 S-II Control System Evaluation 10-S 7.5 S-IVB Parking Orbit Coast Phase Conditioning 7-7 10.4 s-IVB Control system Evaluation 10-7 7.6 S-IVB Chilldarn and Buildup 10;4.1 Cmtrol System Evaluation Transient Performance for During First Bum 10-10 7-0 Second Bum 10.4.2 Control System Evaluation 7.7 S-IV8 Mainstage Performance Curing Parking Orbit lo-10 for Second Bum 7-12 10.4.3 Cmtrol System Evaluation During SecondBum lo-13 7.0 S-IVB Shutdwn Transient 10.4.4 Control System Evaluation 7-15 Performance for Seccmd Bum After S-IVB Second dum 10-16 S-IVB Stage Propellant 7.9 10.5 InstMent Ullt Ctmtml 7-15 Management Components Evaluation lo-26 S-IV0 Pressurization System 7-16 7.10 10.6 Separation lo-26 7.10.1 S-IVB Fuel Pressurization 7-16 Sys tern SECTIOn 11 - ELECTRICAL NETUDRKS AMD 7.10.2 S-IVB LOX Pressurization EIERGENCV DETECTIDK SYSTEM sys tern 7-18 11.1 s-v 11-l 7.11 S-IVB Pneumatic Control Pressure system T-22 11.2 S-IC Stage Electrical Systcl 11-l 7.12 S-IVB Auxiliary Propulsion 7-27 11.3 S-11 Stage Electrical Systm 11-Z 7.13 S-IVB Orbital Safing Operations 7-27 11.4 S-IV8 Stage Electrical Systa 11-3 7-27 7.13.1 Fuel Tank Safing 11.5 lnstnnent Wt Electrical 7.13.2 LOX lank Dueping and Safing 7-29 system 11-3 Cold Helium Dunp 7-32 7.13.3 11.5.1 Suay lT-3 7-32 7.13.4 Ambient Helium Dunp 11.5.2 Battery 6D!O and 6D3D Load Stage Pneumatic Control Sphere 7.13.5 Sharing Analysis 11-8 Safing 7-Y 7.13.6 Engine Start Tank Safing 7-32 11.6 Saturn V Emtgency Detection 7.13.7 Engine Cmtrol Sphere Safing 7-33 Systm (EDS) 11-14 7-33 7.14 Hydaulic System SECTIDN 12 - VEHICLE PRESSURE ENVIRDMNT SECTION 8 - STRUCTUiES 12.1 S-Y 12-1 8.1 SUl?lldl-j a-1 12.2 Base Pressures 12-l 17.2.1 S-K Base Pressures 12-1 Total Vehicle Structures 8.2 12.2.2 S-II Base Pressures 12-1 Evaluation 8.2.1 Longitudinal Loads 12.3 S-lC/S-II Separation Press~wes 12-l 0.2.2 Bending Hacents 8.2.3 Vehicle Dynamic Characteristics SECTION 13 - VEHICLE THERMAl ENV!rDmENT 8.2.3.1 Longitudinal Dynamic 1.i.l Subnay 13-l Characteristics 8.2.4 Vibration 13.2 S-IC Base Heating 13-1 8.3 S-11 POGO Limiting Backup :.:.3 S-11 Base Heating 13-1 Cutoff System 13.4 Vehicle Aeroheating Themal Envinwncnt 13-6 SECTIOK 9 - GUIDANCE XND NAVIGATIW 13.5 S-IC/S-II Separation Themal 9.1 Sumlay 9-l Envimmnt 13-6 9.2 Guidance Coqarisons 9-1 YCTIDN 14 - ENVIROWENTAL CIWRDL SVST'W 9.3 Navigation and Guidance Scheme Evaluation 9-12 14.1 S-WY 14-1 9.3.1 Navigation Evaluation 9-12 14.2 S-IC Enviromntal Control T4-1 9.3.2 Guidax: Schetme Evaluatioa 9-16 9.3.2.1 First Coo-t Period 9-16 14.3 S-II Envirormental Control 14-3 Earth Parking Orbit 9-16 9.3.2.2 14.4 IU Environmcntai Control 14-3 9-19 9.3.2.3 Second Boost Period 14.4.1 Themal Conditioning System 14-3 Post TtI Period 9-19 9.3.2.4 14.4.2 ST-124U-3 Gas Bearing 9.4 Guidance System Conponent sys- (US) 14-5 Evaluatiw 9-21 9.4.1 LVDC and LVJA g-21 SECTlOW 15 - MTA SVSTES 9.4.2 ST-124H Stabi I!red Platform 15.1 s-w 15-1 Subsystem 9-21 15.2 Vehicle Measurement Evaluation 15-1 iv TABLE OF CONTENTS(C~NTIN~D) Plgc 15.3 Airborne VHF Tel-try 20.13 Structum 20-27 System Evaluation 15-2 15.3.1 Performance Smty 15-2 20.14 Lmar Roving Vehicle oescriptim M-27 15.3.2 SIC Telemetry tktr Loss 20.14.1 LRV Overall Dcscrlpttoa After Separation 15-s ZD-27 20.14.2 Subsystem Lkscrlptbn 15.4 C-Band k&r System Evaluation 15-6 20.14.2~1 T4sbility S&system ET - 15.5 Secure Range Sifety CoPmnd 20.14.2.2 Electrical Parr Stisystam 20.14.2.3 Control sod Display Console 2% Systems Evaluation 15-6 20.14.2.4 Ravigatioo Subsystem 15.6 Camand and Comumication 20.14.2.5 Crew Station ill:: systsn Evaluation 15-6 20.14.2.6 Them1 Cmtml 20-W 15.7 Ground Engineertng Crrras 15-8 20.14.2.7 Space SIlpport Equlpocnt Lo-35 SECTlOW 16 - MASS CHARACTERISTICS APPENDIX A - ATlloSpHERL A.1 A-l 16.1 SUilWl~ i6-1 SunWy 16.2 Mass Evaluation 16-1 A.2 Crneral Atmspheric Conditions rt hmch Tim A-l SECTIOh 1: - LINAR IWACT A.3 surfxl? mcrvat1ons at 17.1 Sumnary 17-1 Launch Tim A-l A.4 Upper Air Ilcasurea~t~ 17.2 Translunar Coast Maneuvers 17-2 A.4.1 Yind Steed ;:: 17.3 Trajectory Perturbing A.4.2 Wind Direction A-2 influences 17-4 A.4.3 Pitch Wind Caponent A-4.4 ;:: 17.4 Trajectory Evaluatlm 17-10 Yaw Yind Cmpment A-4.5 Corpannt Yfnd Shows A-4 17.5 lunar Impact Condftim 17-12 A.4.6 Emma Mind Data in the High Dyomtlc Rcglon A-4 17.6 Tracking Data 17-13 TherroQnulc Data SECTTOW 18 - SPACECRAFT Sv)IARV la-1 i-z 1 Tcrpcratue z A:S:Z Atmospheric Pmsur, SECTIOW 19 - A$&D$ ;N$I@iT A.5.3 Atmospheric Dmslty A% i 19-1 A.5.4 @tical In&x of Nefractloo A-15 SECTIQI 20 - LINAR ROVING VEHICLE A.6 Cogarison of Selected Ataospherlc Data for Srtum V 20.1 Smly 20-l ; l mchs A-15 20.2 Deployment 20-l APPERDIXE - U-510 SlMTFlCADT )(IIFIGUMlIOI 20.3 LRVtoStcwdp~Toad cJtyltxs Interfaces 20-Z 8.1 Introdctlm 8-l 2D.4 ;~~~:icability 20-Z 20.5 hhecl-Soil lnteractfm 20-7 to.6 Locomotirn Pcrfcmce 20-11 20.7 khanical Systems 20-17 20.7.1 Hamanic Drirc 23.7.2 hheels tind Srspcnsloe ii-:3 20.7.3 Brakes 20117 20.7.4 Suspension nd St&ility x-17 20.7.5 Har.d Controller 20-18 20.7.6 Loa& 20-M 20.8 Electrical System ZO-;8 i5.8.1 Batteries 2D-;8 20.8.2 Traction Driwt Systa to-i9 20.63 Distribution Sgtm 20-19 20.8.4 Steering 20.86 &vp-Hour Integrator EL:: 20.9 Control and Display CmsoTe 20-71 29.10 Navigation System 20-21 20.11 Crew Statton 20-21 tu.12 ThcrU! 20-23 20.12.1 sknneiy 20-23 20.12.2 Transportation Phase 20-23 29;12.3 Ertranhlcular Acttvlty Periods 20-23 LIST OF ILLUSTRATIU’lS FlguFc Page Figure PmJe 2-l Ground Station lime to 6-6 ~--I;,;~1 lank Ullaga Yehirl: Time Cmversim 2-2 6-11 4-l Ascent Trajectory Position 6-7 S-11 Fuel Plunp Inlet CC#!lpariSOll 4-2 Cmdi:ims 6-13 4-2 Ascent rrajectury Space-Fixe.‘