If your hinges are already failing, you need to replace them. A simple solution would be to make a "Covering Hinge" like this:
Thats a great idea for my Douglas 4 rudder! Thanks! The insrtuctions say to use hinge tape, which I can't find at any LHS. The reason, I think, that I can't use CA, or other hinges, is the fact that the back is, has to be, sealed with epoxy. Sorry to get off your subject wheelpant
Joe