Hard compared to what? It's all about learning. I can fly a rotary aircraft but can't fly a fixed wing to save my life. There's a big difference in the overall feel of the aircraft.
so we can fly
It takes a little bit of practice to be able to fly the RC Scale Helicopters, but they are not too terribly difficult. You can check them out more here. www.heliproz.com/
They fly helicopters.
Nobody can fly only birds ,planes and helicopters so no
It depends on which kind you have. The higher the price the harder they are to fly.
You can fly helicopters.
They fly in California.
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
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.