EL AL

When hearing the “Rolls Royce” combination, it is immediately assumed to be the famous luxury car, but few know that Rolls Royce is also the second largest aircraft engine manufacturer in the world, whose engines were designed and fitted, inter alia, on the Boeing 787-Dreamliner. The aircraft is equipped with a pair of Rolls Royce Trent 1000 engines, considered especially quiet and economical, under its motto of “Powering the Dream”.
The engines can be identified by their distinctive and jagged rear edges.
Do you know why the edges are jagged?