Its New!! Who was built firt helicopter and also send their picture.
Attachments:
Answers
Answered by
1
On 14 September , 1939 Igor Sikorsky was build first helicopter .
Attachments:
Similar questions
English,
7 months ago
Biology,
7 months ago
English,
1 year ago
English,
1 year ago
Computer Science,
1 year ago