As an expert builder using the grace that God gave me, I laid the foundation, and someone else is building on it. But each person must be careful how he builds on it. According to the grace of God given to me, like a skilled master-builder I laid a foundation, but someone else builds on it.
The most-advanced helicopters can fly up to 300 miles before having to refuel. How long any particular helicopter can fly without refueling depends on the size, weight and age of the helicopter.
If you want to fly a helicopter, you need to complete a FAA-approved helicopter flight school and pass a practical test to get your private helicopter license. The FAA requires a minimum of 40 hours of helicopter flight time for students with no prior aviation experience.