Construction: Theboxisconstructed ofgraphite-skinned Nomexhoneycomb panelsjoinedbygraphiteclips.The boxstructureisthencompleted, asmuchaspossible,bythedoorskeyedatthelatchpointsas describedbelow.Thepanelskinsare0.19-mmM46Jgraphitelaminatesandthedoorskinsare0.38mmlaminates,designedforhighstrengthandstiffnessbutwithalowmass.Theexternalfacesofthe boxarepaintedwithaconductivewhitepaintforthermalandstaticconductivity considerations. The boxismountedtothespacecraft sidewallonraisedaluminumbracketsdesignedtoflextoallow relativethermalexpansionoftheboxandspacecraft. TheMechanisms Requirements: Thecompressed tubesneeded tobestowed byahingeddoorandlatching mechanism. Thedoors needed toresistthedeploying forceofthetubesthrough vibration andthermal cycling andstill release uponpyro-activation. Uponrelease, thedoorswouldaccelerate rapidlyfromthestowed strain energy ofthetubesandwouldneedtobedamped rapidlyaftera90-degree rotation toclearthetube deployments. Thispresented thechallenge toallowthedoorstorotatefairlyfreefrom0to90 degrees toremove themfromthedeploying pathofthetubesandthenstopthembetween 90and 180degrees ofrotation beforehittingtheboxstructure withanysignificant force.Thisrequired a special typeoffast-acting damping devicetobeintegrated inalimitedvolume. Thedoorlatching mechanism needed toconstrain andlatchthedooratmultiple pointswithout interfering withthe tubes.Italsoneeded tokeepthedoorcloseddespite boththermal andvibration forcesandthen release thedoorfromapyrotechnic bellows actuator atalltemperature extremes alongwithalimited volume. Construction: Thecomposite doorhasinternally bonded hinge/latch inserts madeofTitanium thatinterface with Titanium hinge/latch inserts bonded intheboxpanels. Thedoorhasagraphite ribbonded onthe outside foraddedstiffness. Theuniquehingesweredesigned tobemulti-functional providing botha hingeandlatchpointaswellashavingaspecial tapered hingetangforthedamping feature. The tapered hingeswillcompress Belleville andcomposite washer stacksthataremounted onthehinge pinsandlatchrodsasthedoorrotates. Clearance isadjusted toallowthewashers tobeengaged at thecorrect rotational point.Energy isabsorbed bybothfrictional forcesandspringcompression. Thelatching isperformed byahigh-strength Titanium rodthatfunctions bothasahingepinand latching mechanism. TheVitralube-coated rodrunsthefulllengthofthedoorandhasmachined flats atthelatchpoints.Astherodisrotated andconstrained bythepyro-mechanism, theflatsrotateand compress downonthelatchfromthedoorandholditontothelatchreceptacle ontheboxpanel hinge/latch insert.Apyro-release mechanism holdstherodinplaceafteritisrotated intoposition. In thelatched position, therodistwisted torsionally toholdforceonthelatches. Alinkarmispressed ontooneendoftherodtoprovide thetorque. Alatcharmrunsoffofthelinkarmandisheldbackby twodisksinthepyro-mechanism. Aseitherbellows' pyroisactivated, adiskwilldropandrelease the latcharmallowing thelatchrodtorotatefreelyandrelease thedoorandtubes.(Shown inFigure8) Analysis Deployment Analysis TheADAMS dynamic modeling software wasthemostimportant verification toolforon-orbit performance predictions. Themodelthatwasusedtopredict thedeployment profileandtheon-orbit dynamics incorporated component testdataforthecompression preload, forthehingesandfortheboomstiffness. NASA/CP--2002-211506 186