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AIRPLANE CRYPTOGRAM PUZZLES: Solutions
In seventeen ninety-nine Sir George Cayley set forth the concept of the modern airplane as a fixed-wing flying machine with separate systems for lift, propulsion, and control. He is considered to be the founder of the science of aerodynamics. The Wright Brothers made the first sustained and controlled heavier-than-air powered flight.
Older and smaller propeller planes use internal combustion engines that turn propellers to create thrust. They are quieter but have less power than jet engines. They are much more affordable than jets so are perfect for transporting a few passengers or a small amount of cargo.
Jet aircraft make use of turbines for the creation of thrust. Turbine engines are much more powerful than reciprocating engines. The jet aircraft was developed in Germany in nineteen thirty-one. The first actual jet was the Heinkel He one seventy-eight.