The value of the photograph will depend on the condition and also the year which the photo was taken. You can go to sites that auction such photos to see corresponding values. Another way to find out the value is by going to a collector.
Go to the Pawn Stars website and tell them what you have. If they pick you, they'll have you on the show. If nothing else, maybe they'll give you an estimate. It would be worth a lot more if the Wright Brothers were in the shot, but it's still worth something. Rick, the Pawn Star guy, happens to be very big on Wright Brothers paraphernalia, so don't take too small an amount. But keep in mind that you will always get more from a collector.