Parky hi ya there;
If you have a look under the heading of 'Masterclass build' - 63ft Whaleback build - there is a description there of how I personally make operating working hinges and there are a few drawings. Also, if you look under the Spashett build - you will see how I make non-working hinges. These are just a couple of ideas to give you some thought, but, somewhere on this Forum - there is a topic which we began a while ago, and there were 2-3 of us all chipped in about different ways of making hinges. I cannot find the topic, so maybe either Martin Mayhem or one of the moderators may be able to help us out here.
Aye
john