With the recent thread dealing with the possibility of spinosaur
scavenging, participants might be interested in a speculative
theoretical paper about large theropod scavenging that I published
several years ago:
J.O. Farlow. 1994. Speculations about the carrion-locating ability of
tyrannosaurs. Historical Biology 7: 159-165.
I basically argued that tyrannosaurs (and other big theropods) could
have capitalized on being tall bipeds in detecting carcasses by smell or
sight, having an advantage over carnivores whose heads are closer to the
ground.