Rotors blades rip up bloons on contact, including frozen and lead.
Official Bloons TD 5 Mobile description.
Bloons TD 5, Battles, Monkey City, Bloons TD 6
Medium: $1750 Hard: $1890 Impoppable: $2100 BTD Battles Mobile: $1250
Razor Rotors is the third upgrade on the first path for the Heli Pilot. It allows the Heli Pilot's blades to hit bloons on contact, popping them. It can also pop Lead Bloons and frozen bloons.
Update History (Bloons TD Battles Mobile) Edit 4.3
Razor Rotors attack speed of rotors increased by 50%.
Razor Rotors price decreased ($1750 → $1250).
Razor Rotors Artwork (BMC Mobile)
Using Target Priority: Pursuit can sometimes render this upgrade useless, because the Heli Pilot generally flies beside the track. It sometimes hovers over, and damage MOAB-Class Bloons while in Pursuit mode.