With the blade length and rotation speed and I would guess a much lower speed of sounds on Mars were there any concerns with the blades breaking the sound barrier?
Speed of sound on Mars at ground level is ~540mph.
This web experience lets you hear what a person might sound like on the Red Planet. You can also hear sounds captured by NASA’s Mars Perseverance rover.
4 feet diameter @ 2400rpm = tip speed of ~502mph.
Close, but not quite over.
EDIT: Mods, please move this to an appropriate Forum.