HE2G8

Autor:

NieznanyUnknown author

Credit:

http://www.centennialofflight.gov/essay/Rotary/early_20th_century/HE2G8.htm
Transferred from en.wikipedia

Krótki link:

https://plwiki.pl/b/853a

źródło:

Wikimedia Commons

Wymiary:

504 x 157 Pixel (27573 Bytes)

Opis:

In 1907, the French inventor Paul Cornu made a helicopter that used two 20-foot (6-meter) counter-rotating rotors driven by a 24-hp (18-kW) Antoinette engine. It lifted its inventor to about five feet (1.5 meters) and remained aloft one minute.

Licencja:

Public domain

Komentarz do licencji:

PD-USGOV