If you are looking for "starship" hums, engine whooshes, or futuristic landing noises for creative projects, several royalty-free platforms offer high-quality MP3 downloads.
: Offers over 700 royalty-free spaceship and spacecraft sounds, including engine loops, ambient hums, and door closing effects. Download Spacecraft Sound mp3
For actual recordings of spacecraft, is the primary authoritative source. They provide a library of historical audio from various missions, including the Space Shuttle, Apollo, and Mercury programs. If you are looking for "starship" hums, engine
: This library includes MP3 and M4R files of launch countdowns, engine ignitions, and iconic mission control communications. including engine loops
When downloading these files, ensure you check the specific license: Historical Sounds - NASA
: Features a specialized collection of "starship bridge communication" and "deep engine hums" available for MP3 download.