Why Were Old Jet Engines So Much More Smoky Than Newer Ones?

The dawn of the jet age saw the skies near major airports raked with thick black smoke trails. These exhaust plumes have largely disappeared from our atmosphere due to continuous jet engine innovations. Here is the story of the jet engine’s amazing change in visual and ecological signature since its introduction into… » 7/30/15 7:40pm Thursday 7:40pm

This Near Collision Between Two Airplanes Will Make Your Heart Skip a…

This seems like yet another boring refueling video taken by a KC-135 Stratotanker's flying boom operator—until the NATO E-3 Sentry AWACS plane almost crashes with it. At the last second, the Sentry's pilot pushes down in a massive negative G-force party, avoiding a fatal outcome. Things look fun when a major… » 10/26/12 11:00am 10/26/12 11:00am

50-Knot Sentry Drone Is the Ultimate in RC Boats

Just eleven and a half feet in length, the Sentry is an unmanned surveillance craft from British defense firm Qinetiq that can hit speeds of 50 knots. The boat, which can work up to 16 miles from its controller, and go for up to six hours, is on show at an arms fair in London this week, and has all sorts of tricks up… » 9/13/07 7:30am 9/13/07 7:30am