stealth aircraft

Wind turbines can be a radar operator's worst nightmare. By scrambling radar waves as blades spin faster or slower, large wind farms are sometimes capable of erasing airplanes from radar screens completely. But a Danish wind turbine company and a UK defense contractor may have found a solution by unveiling the first "stealth" wind-turbine blade last month.

The B-2 stealth bomber, assisted by midair refuelings, can fly a 44-hour mission to the other side of the world, take out targets using laser-guided smart munitions, then sneak out of enemy territory undetected. Yet it runs on Intel 286 processors -- state of the art in 1982, but these days, not so much.

Stealth aircraft come in two forms: angular evaders like the B-2 bomber, and cruder radar jammers that simply overwhelm the enemy's air defense systems, allowing entire squadrons to penetrate hostile territory. Boeing's E/A-18 fighter jet is the latest entry in the latter group, but it's far from crude. Based on the nimble F-18 platform and outfitted with three jamming pods, it can outwit and outmaneuver the most advanced attack squadrons. The plane recently completed its first test flight; it should go into service by 2008.