PREVIEW
... he large helicopters flew at 300 kph and were loaded with a large amount of ammunition. The sound of their rotors was deafening. Helicopters gave the image of making a great din as they flew through the sky, but the military ones were ingeniously constructed so they flew almost silently.
These were different from that ideal design.
They were quite different from the American military ones that were small, fast, and quiet. The mere fact that each one required 3 people to pilot it ...
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