I've done this a couple of times on aeros trips with an instructor. You see another plane that looks like it might want to play, fly by and both planes turn in towards each other and the circling "fight" begins. It is just about the most fun you can have in a small aeroplane IMHO.
Yesterday was the first time I have been challenged while on my own and who was I to refuse?
So we had an entertaining few minutes turning on each other.
I just wondered if there are any unwritten rules or points of etiquette for this kind of thing? Is it just a turning game or can you loop and dive etc? How do you indicate a win or concede a loss? Wing waggles? Take as read the 500 and 1500 feet rules, the need to check airspeed and altitude periodically, the need to do some kind of HASELL and the need to be in a suitable aeroplane.
Also, I lost. Any tips?