Hitler's Secret 'Stealth' Jet: The Ho 229 In 2008, Northrop Grumman teamed up with the National Geographic channel to reconstruct a mockup of the Ho 229, which they tested for radar reflection, and then pitted against a simulation of the British Chain Home radar network. Their findings were less than overwhelming—the flying wings would have been detected at a distance 80 percent that of a standard German Bf. 109 fighter. Here's what you need to know: While it may be a stretch to claim that the Ho 229 was intended to be a stealth aircraft, there’s little doubt that it pioneered design f...