Radiator assembly for Boeing’s GA-1, or “GAX.” You ask “what is GAX?” I answer: “Ground Attack eXperimental. GAX Almighty was a great armored triplane that was supposed to be impervious to the puny weapons of enemy soldiers. While bullets pinged off its armored sides, GAX’s gunners amused themselves by shooting the enemy below like they were fish in a barrel. Well, that was the idea. In reality, GAX weighed so damned much you could hardly get it off the ground. The Air Service bought 10 of the beasts, flew them for a few years, and then moved on.