You can find extended clips like a 5-minute, 29-second recording of a helicopter landing with cockpit radio on HookSounds .
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. helicopter_sound_effect_flying_5_minutes
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 You can find extended clips like a 5-minute,
Great for high-fidelity, curated flying and hovering sounds. curated flying and hovering sounds.