LESSONMotors & Drivers · Part 7EP.194 · 24 s

Motors Part 7: What does KV mean? How fast will your motor spin

Name: Motors Part 7: What does KV mean? How fast will your motor spin
Uploaded: 2026-10-31T07:00:00+05:30
Duration: 24 s
Description: KV = RPM per volt with no load: a 2300 KV motor on 11.1 V spins about 25,500 RPM; higher KV = faster but less torque, so big props need low KV.

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// WHAT YOU WILL LEARN

KV = RPM per volt with no load: a 2300 KV motor on 11.1 V spins about 25,500 RPM; higher KV = faster but less torque, so big props need low KV.

// LESSON NOTES

What does "KV" mean on a brushless motor? 🚁⚙️

❌ Not kilovolts!
✅ KV = RPM per volt — how fast the motor spins for every volt, with nothing attached.
🧮 1000 KV × 12 V = about 12,000 RPM (no load).
🌀 Put a propeller on and the load pulls the speed down a bit.
🐢 Big propeller? Pick LOW KV: slower, but more twist (torque) — like 300–700 KV on big camera drones.
⚡ Small, fast props love HIGH KV — racing drones use ~2,000–2,700 KV.

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