This is the sound of a plasma cutting system. Recorded while cutting a big piece of metal scrap from 100 years ago. It was a machine used for textile works. And now, we are selling these scrap which makes me kind of sad. . . I wish i could put some pictures!.
By using the noise channel on beepbox. Co, i recreated the sound of a helicopter. . . At least, how it would sound in a nes or sega master system game!.