ПереводWhen he died, his blue-prints were lost, hidden or sold. They

Перевод
When he died, his blue-prints were lost, hidden or sold. They were not collected and published in one book until the end of the 19th century. But then other men had re-discovered all that he had known four hundred years before. But his work had at least one very definite result. It directly inspired Igor Sikorsky, a Russian, to make the first really successful helicopter.