The plane so good it’s still in production after 60 years

In 1956, Cessna started building the 172 training plane - and more than 60 years on, it's still in production. Why has it been so popular? It can seat four people, in a squeeze, and weighs a little under 800kg without fuel or its passengers. It has a maximum speed of 140mph (226km/h), though you ...

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