QPT 3115-900KV Brushless Motor

FPV Brushless Motor (900KV) – Overview

This FPV brushless motor is an entry-level model designed to meet the needs of a wide range of users. It offers a strong balance between cost-effectiveness and reliable performance. Therefore, it suits both beginners and experienced drone pilots.

In addition, the motor delivers stable output and efficient power usage. As a result, it works well for FPV drones, UAV systems, and general aerial applications.

General Specifications

• KV Rating: 900 KV
• Internal Resistance: 54 ± 3 mΩ
• No-Load Current: 0.67 A
• Maximum Thrust: 4250 g
• Maximum Power: 1700 W
• Maximum Current: 72 A
• Motor Size: 37.3 × 48.8 mm
• Motor Weight (including cable): 108 g

Key Features

• Designed for both beginners and professionals
• Balanced performance with cost efficiency
• High thrust output for stable flight
• Reliable performance under load
• Suitable for FPV drones and UAV applications

Performance Overview

The motor was tested under controlled conditions to ensure accurate results. The test setup used a 6S battery and a G 10×5.0×3 propeller at an ambient temperature of 25°C.

As throttle increases, the motor delivers higher thrust and power output. At full throttle (100%), it reaches up to 4047 g thrust while drawing 63.5 A current. In addition, it maintains stable voltage levels and consistent efficiency across the range.

Performance Highlights

• At 50% throttle:
  • Thrust: 2320 g
  • Current: 24.69 A
  • Efficiency: 3.91 g/W
• At 80% throttle:
  • Thrust: 3160 g
  • Current: 40.18 A
  • Efficiency: 3.30 g/W
• At 100% throttle:
  • Thrust: 4047 g
  • Current: 63.5 A
  • Power: 1496.7 W
  • Efficiency: 2.70 g/W

Motor Drawing:

Performance Curve:

Ambient Temperature: 25 C ; Propeller: G 10 x 50 x 3 ; Battery 6S