Engine blades are crafted by Rolls-Royce engineers using an ancient form of metalworking to create a single-crystal structure that is incredibly strong, and still incredibly light. Casting has been around for millennia, but at the Rolls-Royce Advanced Blade Casting Facility (ABCF), this traditional craft is elevated to levels akin to science fiction. Here, engineers set about rearranging the metal alloys at an atomic level to eliminate microscopic grain boundaries that could make the blades, eventually, fail. //
To maintain the integrity of the metals in the blades, they are coated with a low conductivity ceramic, and cool air is fed around the blades via tiny cooling holes. The ‘cool’ air is actually around 600 °C , so not that cool really, but relatively cool enough to make a difference. Speaking to The Engineer in 2017, Rolls-Royce chief of materials, Neil Glover, explained,
“It passes through the cooling channels and exits through a myriad of holes in the surface of the blade, to create an envelope of cool air around the blade. So the metal is never above its melting point, even though the environment is.” //
The efforts of this company to resolve the situation have been nothing short of incredible. Even with the impact of COVID, and the huge loss of revenue Rolls-Royce has suffered as a result of fewer widebodies flying, it stuck to its promise and fixed the problem for good. Now isn’t that something worth making some noise about?
