Tailweel lock in the best twin of all time...
I see a couple mentioning the DC-3/C-47 here.
I'm only a low-hour person on these but for those that have never had the privilege it's probably worth mentioning that they do have a tailwheel lock. It was part of our checklist to ensure this was in or out at appropriate times!
Perhaps this was one reason for us always using three-pointing the machine. It wasn't necessarily mandated but we all understood it wasn't to be wheeled on, although one of the very experienced guys did do that (very nicely too :-).
FP.