u00b0 f through conduits 28 for further combustion reaction in combustion zone of combustion chamber 27 with the air which is scooped in through the air inlet 23 of the ducted member 22 the conduits are defined by a housing or containment structure 31 the fuel insulator 24 performs a dual functions as the name implies i e fuel and insulator the fuel insulator contributes gaseous products for the combustion chamber reaction while protecting the rocket motor case by its insulation function at the same time a solid fuel ducted rocket augmented with gel oxidizer is depicted as system 30 of fig3 besides the capability to combust the solid fuel generator gases with air as in system 20 of fig2 system 30 of fig3 additionally comprises a capability to combust the fuel rich gap sfgg effluent with inhibited red fuming nitric acid irfna gel oxidizer to produce higher thrust during the boost and dash stages of a flight like numbers of fig2 are employed in fig3 to identify common elements 21 22 23 24 25 26 29 28 27 and 40 as depicted in fig2 which comprise a rocket motor case a ducted member air inlet fuel insulator an exhaust nozzle gap sfgg igniter means conduits for fuel rich hot gases a combustion zone combustion chamber and an intake closure respectively fig3 depicts an irfna gel system having a housing 31 or containment structure for containing irfna gel.