Here are the answers to last Friday’s video, enjoy!
Suggested ICAO level for video: 5+
- The belief was that if they lost a single engine, they would only be able to fly for an hour with the one remaining engine and so, for security reasons they couldn’t fly more than an hour from a coastal airport.
- They couldn’t make a profit on many routes, so the big planes only operated into and out of big cities.
- They became popular as a way to avoid twin-engine restrictions while also having a lower cost than four-engine planes.
- It came from the days of piston-engine aircraft. These engines were much less reliable and often broke down.
- An airline also needs a special maintenance plan, a special flight crew, a special cabin crew, special dispatchers, special fuel quantities and special passenger recovery plans.
- The 787 has an ETOPS rating of 330 minutes and the A350 has an ETOPS rating of 370 minutes.
- Because of the bigger ETOPS ratings, three and four engine jets are becoming less and less common.