Is "rudder lock" another term for "rudder tramping?"
Dunno, maybe...depending on the symtoms.
Rudder lock on the DC-3 was caused by the very deep set rudder hinge line.
Was the Lincoln rudder similar?
NB.
It seems to me that proper rudder use is one of the least understood aspects of flying.
Some pilots don't use enough (in many types of early aircraft, the C-46 is a prime example) and a few use far to much rudder (example, AA587), so, perhaps a reference to DP Davies superb book, will lend some thought to those that have never thought much about 'the rudder'.
IE; it can kill you dead if not used properly.