My rc heli has this motor ot-rk-370ph-5133/49. I found this link https://www.sinoning.com/product/small-mini-370-dc-motor-3v-12v-46000rpm-high-speed-strong-large-torque-ot-rk-370ph-5133-electric-motor-diy-car-model/

which mentions the spec. Not sure I'll find this motor in India so looking for a similar specd replacement.

These days motors have a KV unit which I'm not sure how to compare to RPM.

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my surprise, the guy in this video: is using A2212 1400KV motor which would provide only 1400x3.7=5180rpm which I'm not sure would be enough to lift up almost 500g heli?

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I ended up ordering the exact parts from https://todayrc.com .

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