The idea of the airscrews, propellers and parachutes contributed to great heights in the aviation industry. _____________, Leonardo set the pace in invention of heavier-than-air craft such as helicopter and gliders. He became the first person to make scientific suggestions that contributed later development of aviation industry.

_____________________Vietnam’s domestic market is highly potential due to the fact that surface transportation infrastructure is not competitive. It takes more than 30 hours to travel by train, from Hanoi to Ho Chi Minh City, much higher than nearly 2 hours of normal flight.

 Aircraft includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft _________ hot air balloons and airships.

__________________, there have been many changes in airplane designs since innovation, development and in the future. Engineers have been drawing their ideas from nature, and they have been using biomimicry to inspire their designs. Human beings have been trying to fly since over a thousand years ago, and they even tried making planes, kites and flying from cliffs. Most of them fell and hurt themselves.

_____________________ by becoming a pilot you get one of the best salaries in the world, you gain a lot of prestige and you travel the world for a living.