If you can't find a single 5-minute file that fits your specific needs, download a high-quality 30-second loop from Storyblocks or Pixabay and duplicate it in any free editor like Audacity to reach your desired length. Helicopter Flight (75 Minutes) - SoundCloud
If you need much more than 5 minutes for background ambience or sleep, this 75-minute recording on SoundCloud offers a deep, immersive flying drone. helicopter_sound_effect_flying_5_minutes
Finding high-quality, long-duration helicopter sound effects can be tricky since many stock libraries focus on short clips. For a solid 5-minute experience, you can use these verified sources for continuous flying and ambient sounds. If you can't find a single 5-minute file