The QF-4 provides a realistic full-scale target for air-to-air weapons system evaluation, development and testing at Tyndall Air Force Base, Fla., and Holloman AFB, N.M. The QF-4 is a remotely ...

Of course, using guns for air defense is as old as the airplane ... These lock onto their target, guide themselves in, and explode before impact to spray the target with shrapnel.