The largest motor was roughly an H-class motor, which is very powerful. A top-end commercially available model rocket engine is usually an F-class and each letter is double the amount of thrust ...

The new engine model ... Heavy rocket, by building a totally reusable "Big F---ing Rocket" system designed to colonize Mars. This story was originally published on Wednesday at 7:37 p.m. ET ...

Eventually, a 16-foot-tall model of Blue Origin’s New Glenn rocket will take its place beside the engine. Two BE-3U engines power the upper stage of the New Glenn orbital-class rocket ...

PALM BAY — An experimental rocket engine being test-fired accidentally ... was reported to firefighters about 6 p.m. Saturday along Irwin Drive in the area, a large swath of abandoned property ...