Видео ютуба по тегу The First Helicopter Prototypes

1920s Early Helicopters

The first helicopter prototype (short documentary)

The First Flying Machines - Failures and Mishaps

Von Baumhauer's helicopter prototype (late 20s)

Hürjet Takes Flight: Turkey’s New Supersonic Jet Trainer & Light Combat Aircraft!

World's First Helicopter - Prehistoric

Here are the first videos of the Army's new futuristic helicopter prototype

The first photo of the unmanned attack helicopter prototype Ukraine

F 2077 Bell helicopter prototypes "The Modern Magic Carpet"

Prototype - First Helicopter mission - Tutorial Fail

Third Prototype Kopter SH09 Helicopter Makes First Flight – AINtv

Helicopter or the prototype of one of the first drones?

First Flight of Leonardo's AW09 prototype PS4 Helicopter in Switzerland