The first successful powered helicopter flight occurred on June 26, 1939, when the German engineer Heinrich Focke flew the Focke-Wulf Fw 61. However, earlier concepts and prototypes, such as the 1907 design by Paul Cornu, had been tested without achieving sustained flight. The development of helicopters advanced significantly during and after World War II, leading to the designs and technologies used today.
Vertical Envelopment, or the use of helicopters in combat, was first introduced in the Korean war.
The Korean war was the first time Vertical Envelopment was used, or the use of helicopters to assist troops in battle.
Jets were introduced by the Nazi's towards the end of WWII. Helicopters debuted for the Americans in Korea. Admitting that the question itself is requesting a subjective answer, I'm tempted to say the first war to see extensive use of both jets and helicopters was Viet Nam, but that was only a conflict, so I guess the first American war to see extensive use of both jets and helicopters was Gulf War I, and the first war in the world to see extensive use of both jets and helicopters was probably the Falklands War.
The Germans built a few experimental helicopters before WW2, but never put any into production. The first production German helicopter was the MBB 105, about 1966
Nobody invented the helicopter in 1909
They fly helicopters.
You can fly helicopters.
They fly in California.
Less than an hour. Now some can fly over 6 hours
There are many different helicopters. Most small civilian helicopters may fly for about an hour, but large passenger or military helicopters can fly for 6 hours or more.
No
so we can fly
Yes, there are helicopters available.
Helicopters can fly directly up or down.
Some experimental helicopters can fly as fast as 300 mph. However most helicopters in service fly less than 200 mph.
NO
Fly aeroplanes and helicopters