Chainsaw like sound

[GNova]

Hi, long story short, I am not really looking for a "How 2 maek it un masseav plz", I am looking in a first place for the knowledge about those sounds, their names, the way it works, and if possible how to make it !

1min08 for example https://soundcloud.com/lindien/apashe-battle-royale-vip

1min00 https://soundcloud.com/lindien/apashe-battle-royale

I read a long long part of the growl bass topic with no clue (even the reese bass one, you now know how desperate I am)

Thank you !