„Russian missile developers explained to Aviation Week the problem they had using the remains of a downed U.S. Air Force F-117 stealth fighter to upgrade the stealth-detection capability of their next-generation air defenses. Because only sections of the F-117 survived intact, „we haven’t been able to model the entire [low-observable bomber],“ a Russian engineer conceded. „It’s not the same as testing against an undamaged F-117. You provide us with a complete stealth aircraft and then we’ll tell you how effective we are.“
Therefore, having a virtually intact aircraft should present fewer problems for reverse engineering. However, it is a lengthy process and often means replicating a design that is already several years and at least a generation of technology behind.“