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
During the late 1940's
They fly helicopters.
No, Helicopters cannot fly in Stratosphere. It is too high for them. They do not produce that much lift. But they can fly in the Troposphere.
They fly in California.
You can fly helicopters.
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.
so we can fly
No
Helicopters can fly directly up or down.
Yes, there are helicopters available.
Some experimental helicopters can fly as fast as 300 mph. However most helicopters in service fly less than 200 mph.
to fly ?