Buy a cheap 600KV brushless motor online, which is designed for RC boats. It has 50V Max voltage. Waterproof brushless motor has the advantages of small size, high efficiency and long service life.
Model: ATO-SP-056102-10Rotational Speed: 600KVMaximum Current: 126AMaximum Voltage: 50VMaximum Power: 6300W
Length: 102mmDiameter: 56mmWinding Type: WYENumber of Turns: 3YNo-load Current: 1.8A
Max Seed: 30000KVNumber of Rotor Stages: 4Shaft: 8mmWeight: 1040g
Tips: Is lower KV better for brushless motors?
The higher the KV, the higher the resistance. Higher resistance results in a slower motor. This means that the rotation rating is inversely proportional to the amount of electricity produced by the motor. Therefore, brushless motors with lower KV tend to be faster.