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Video answers: ‘Transforming the jet engine’

Here are the answers to last Friday’s video, enjoy!

Suggested ICAO level for video: 5+

  1. They’re loud, use a lot of fuel and aren’t good for the environment.
  2. The problem is that neither the fan at the front, nor the turbine at the back are operating at their most efficient speeds.
  3. His change was to introduce a gearbox into the shaft of the engine which allows the fan to spin more slowly and the turbine more quickly.
  4. It made the engine 15% more fuel efficient and up to 75% quieter.
  5. They’ll save around $1.5M dollars per plane per year.

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