'In 1913 this Russian Helicopter pioneer built "Le Grand" the first 4-engined airplane'
Sikorsky
AVIATION: In 1913 this Russian Helicopter pioneer built Le Grand the first 4-engined airplane
In 1913 this Russian Helicopter pioneer built "Le Grand" the first 4-engined airplane
In 1913 this Russian Helicopter pioneer built "Le Grand" the first 4-engined airplane
AVIATION
Sikorsky
AVIATION