HOW DO THREE KILO­GRAMS BE­COME 30,000?

World of Knowledge (Australia) - - Technology -

An av­er­age Cana­dian goose weighs 3.65kg: they’re large, bulky birds with sturdy bones and ev­ery air­craft has to sur­vive an im­pact with one, even if it oc­curs at 480km/h. That’s the max­i­mum speed dur­ing the take-off and land­ing phases, when bird strikes usu­ally oc­cur. The huge forces cre­ated by a feath­ery im­pact ex­ceed the bird’s body­weight by a fac­tor of 10,000. Luck­ily, the nose cone of this Boe­ing 737 (right) was well-equipped with shock-ab­sorb­ing ma­te­rial. The most vul­ner­a­ble ar­eas of the plane are the cock­pit win­dows and en­gines. To test their safety, and whether they can work dur­ing an emer­gency, com­pressed-air cannon known as chicken guns fire blocks of gela­tine or dead birds into the tur­bines while they’re run­ning at full power.

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