3C 216 has a weak accretion flow luminosity , well below the Seyfert1/QSO dividing line , weak broad emission lines ( BELs ) and powerful radio lobes .
As a consequence of the extreme properties of 3C 216 , it is the most convincing example known of an FR II radio source that is kinetically dominated : the jet kinetic luminosity , Q , is larger than the total thermal luminosity ( IR to X-ray ) of the accretion flow , L _ { bol } .
Using three independent estimators for the central black hole mass , we find that the jet in 3C 216 is very super-Eddington , 3.3 L _ { Edd } < \overline { Q } < 10 L _ { Edd } , where \overline { Q } is the long term time averaged Q ( t ) , calculated at 151 MHz .
It is argued that 3C 216 satisfies the contemporaneous kinetically dominated condition , R ( t ) \equiv Q ( t ) / L _ { bol } ( t ) > 1 , either presently or in the past based on the rarity of L _ { bol } > L _ { Edd } quasars .
The existence of R ( t ) > 1 AGN is a strong constraint on the theory of the central engine of FRII radio sources .