Apollo Saturn Manual do Utilizador descarregar pdf (Página 33)

LAVNCII VEIIICLE SECURE P_%NGE SAFETY .,¢\'_'i'c"¢',,.• ,..,

The Secure Range Safety Systems, ]ocatcd on th,, S-IC, S-II and S-IVB st_L_',e_,

provide a means to terminate the flisht of an er_atic w, hiclc by the tr._.,._mission

of coded commands from ground stations to th_ w,hic]e during l,oo,_t pl,_:;e. 'fh_

Range Safety Officer (RSO) terminates the fl_Eht of an erratic vehicle (tra-

jectory deviations) by initiating the c::erg,:ucy _._gin_ cutoff co::_,.namland, if

necessary, the propellant dispersion conx "_d.

11ae certain,and destruct system in each stag. i:s completely separate and lnde-

pendent of tho.°e in the other stages wiO_ the exception el a 2 for "3voting

arrangement between the S-]C and S-!T Range Safety System Ccntroxters. This

arrangement eliminates a single point failure in the S-IC ralge safety system

controller, which, if it failed would cause an unnecessary S.-IC engine cutoff.

The system in each powered stage consists of a range safety antenna sub-

system, two aec_re command receivers, two Range Safety Controllers, two Secure

Range Safety Decoders, two Exploding Bridge Wire (EBW) firing units, two EBW

detonators and a common safe and arm device which connects the subsystem to the

tank cutting charge. Electrical power for all elements appearing in duplicate

is supplied from separate stage batteries.

Prior to launch, the safe and arm device is set to the "ARM" position by

ground support equipment and the system remains active until orbital insertion.

After orbital incertion, the S-IVB stage range safety receiver is deactivated

._ (Safed) by ground command from the Range Safety Officer.

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] 9700] ] 707-033

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Apollo Saturn Manual do Utilizador Página 33