  Blazars - active galaxies with the jet pointing at Earth - emit across all
electromagnetic wavelengths. The so-called one-zone model has described well
both quiescent and flaring states, however it cannot explain the radio
emission. In order to self-consistently describe the entire electromagnetic
spectrum, extended jet models are necessary. Notably, kinetic descriptions of
extended jets can provide the temporal and spatial evolution of the particle
species and the full electromagnetic output. Here, we present the initial
results of a recently developed hadronic extended-jet code. As protons take
much longer than electrons to lose their energy, they can transport energy over
much larger distances than electrons and are therefore essential for the energy
transport in the jet. Furthermore, protons can inject additional leptons
through pion and Bethe-Heitler pair production, which can explain a dominant
leptonic radiation signal while still producing neutrinos. We will present a
detailed parameter study and provide insights into the different blazar
sub-classes.
