31 дек 1938 г. - Helicopters
Описание:
Igor Sikorsky is credited with invented the world’s first helicopter as we would recognise it. But the first record of a rotary winged craft dates back to the 4th Century in a book called “Pao Phu Tau” which describes a flying car kept in the air by spinning blades.Добавлено на ленту времени:
Дата:
31 дек 1938 г.
Сейчас
~ 86 г назад