One of my favorite stories that my Dad told me was of his work on the Sidewinder Missile development project at China Lake early in his career. He was on the team initially developing this air-to-air missile fired from a fighter jet: but there was a dilemma on how to mount the missile. They wanted to mount the missile under the wing, but the question was, when firing the missile, would the missile accelerate so quickly that the vertical stabilizer would cut through the wing. There were great arguments between the two camps (Camp One: the missile will easily miss the wing Camp Two: the missile will clearly cut through the wing) – when it occurred to someone, they could just build a test wing and missile and find out. In order to not risk a test pilot and a whole plane, a wing segment was mounted on a rocket sled (since they needed the wing and missile travelling at speed for the test to be valid), with the Sidewinder Missile hanging under the wing segment. Because the rocket sled was fairly close to the ground, they decided to build the missile with just the vertical stabilizer, and not all 3 stabilizing fins (since the lower fins wouldn’t fit between the wing segment and the ground). They all gathered in the bunker next to the rocket sled tracks, both those that felt the vertical fin would rip through the wing, and those like my Dad, who were sure that the missile would drop fast enough to miss the wing as it accelerated. The rocket sled fired its main engines and took off along the test track. The test speed was achieved, the Sidewinder Missile was fired, and just as my Dad had predicted, the missile dropped under the wing and sped off in front of the rocket sled. It was at that point that someone asked, “Did anyone do an aerodynamic analysis of a Sidewinder Missile with only one stabilizing fin?” – they all looked at each other and then back out through the bunker window, only to see the Sidewinder Missile arch up and then back, straight towards their bunker. Everyone panicked, started running back and forth like chickens with their heads cut off, completely at a loss as to what to do. Luckily, the missile remained unstable, and crashed into the ground just yards away from the bunker. That’s how engineers have fun in the desert!