this needs to be guessed by 0800 UK time
Or else?
Your last was the Woomera (wish I had of seen that one) so maybe another from Oz? Doesn't have a lot of similarities but only one built, although no mention of replicas or why you would even want to.
The shirtless youth with the Adidas runners looks very cultured so most likely Australian and I'm sure he's practising an old Aussie tradition, "how close can I put my face to a spinning prop?" or "is this going to hurt?"
The Amsco Parasol Monoplane..?