VCI Spark 1507.2 3900Kv is a lightweight motor suitable for 3" cinewhoops with a 4S battery. It weighs just 14.8g including 100mm 24AWG wires. The 15x7.2mm stator in a 12N14P configuration is complemented by rounded N52SH magnets, and the shaft has a diameter of 1.5mm.
At 16V with a GF D75-3 ducted propeller, it delivers up to 653g of thrust at a current draw of 23.5A. The motor mounts to the frame with four M2 screws on a 12mm pattern.
