After a few seconds, when the X-15 was safely away, the pilot started its rocket engine.

VOA: special.2010.07.07

When he is clear of the B-52, he starts the X-15's rocket engine.

VOA: special.2010.07.07

The other engine is the Leap X, from CFM International, a joint venture between America's General Electric and France's Safran.

ECONOMIST: Airbus plays the new-engine card

Ideal for viewing content from any source, the XBR-HX950 LED Internet TV includes the X-Reality PRO Engine, a two-chip digital video processor that optimizes any type of HD, SD or low-resolution Internet video.

ENGADGET: Sony sets US pricing for 55-, 65-inch HX950 HDTVs: $4,499 and $5,499

For example, the 4K X-Reality PROTM picture engine reduces visual noise and corrects image shapes.

ENGADGET: Sony announces 65-and 55-inch Ultra HD TVs at CES: arriving this spring, pricing a mystery