Yes- he married his first cousin in 1906.
he married catherine Nossenko in 1906
yes he did with his later second wife .vera de bosset on his first wife he was a nasty boy
He didn't.
Igor Sikorski built the first practical helicopter
Igor never flew a helicopter, but he did build one though.
Igor Sikorsky became and still IS famous for inventing the first practical helicopter.
That is Igor Sikorski, and he was in his 40 's when he invented the first practical helicopter.
Igor Sikorsky did.
Igor Sikorsky!:))))
Igor sikorsky
The first Helicopter was made by Igor Sikorsky, in 1939.