The performance of the motor in an airsoft gun is often measured in RPM (Revolutions Per Minute), which indicates the speed of rotation of the motor. Understanding the motor RPM, e.g. 25k, 30k, 35k, etc., as well as brushless technology, can help you choose the right motor for your setup.
RPM (Revolutions Per Minute) explained
What does 25k, 30k, 35k, etc. mean?
The number indicates the maximum rotational speed of the motor in thousands of revolutions per minute when there is no load (without resistance from gears and springs). Here's what it means:
- 25k RPM (Low Speed, High Torque):
- Lower RPM motors have higher pulling power (torque), making them ideal for heavy-duty springs (M120-M150+).
- Suitable for DMR and sniper setups.
- Low firing rate, but stable performance under high load.
- 30k RPM (Balanced):
- Good balance between firing rate and traction.
- Perfect for standard setups with springs around M100-M120.
- Ideal for players who want a versatile engine.
- 35k RPM (High Speed):
- Increased rate of fire for fast-paced games like CQB.
- Less torque, making it best for lighter springs (M90-M110).
- Suitable for high-speed setups with fast gears like 13:1 or 16:1.
- 40k-45k RPM (Extreme High Speed):
- Maximum shot cadence for intense play, but with low torque.
- Only recommended for setups with light springs and reinforced gears.
- Often requires high C-rating LiPo batteries for optimal performance.
Brushless motors: The future of airsoft motors
What is a brushless motor?
A brushless motor uses magnetic technology to rotate without carbon brushes, making it more efficient and durable than traditional motors (brushed motors).
Advantages of brushless motors:
- Increased durability:
- No carbon brushes means there are no parts to wear out quickly, reducing maintenance requirements.
- Efficiency:
- Higher energy efficiency results in longer battery life and less heat generation.
- Smooth operation:
- Less vibration and more constant RPM under load.
- Advanced features:
- Many brushless motors have integrated electronics that allow for precise control and high performance.
Disadvantages of brushless motors:
- Price: Brushless motors are more expensive than brushed motors.
- Compatibility: Often requires specific electronics (e.g. MOSFET) for proper function.
How do you choose between brushed and brushless?
- Budget:
- If you are looking for a reliable and affordable solution, brushed motors are still a good choice.
- Brushless motors are worth considering if you are willing to invest in advanced technology.
- Playing style:
- For high-speed and demanding setups, brushless motors can provide an advantage with their smoother operation and efficiency.
- For standard setups and beginners, brushed motors are often sufficient.
- Long-term use:
- If you play intensively and often, a brushless motor may provide a better investment with its durability and low maintenance requirements.
Advantages and disadvantages of engines with different RPM
- Low RPM (25k-30k):
- Advantages: High torque, ideal for powerful springs and heavy setups.
- Disadvantages: Low rate of fire.
- Mid RPM (35k):
- Advantages: Good balance between firing rate and power.
- Disadvantages: May lack the specialization that high-speed or high-torque motors offer.
- High RPM (40k-45k):
- Advantages: Extreme firing rate for high-speed setups.
- Disadvantages: Low torque, which may limit use with heavy springs.
Conclusion
- Brushed motors: Perfect for most players and setups that don't require advanced technology.
- Brushless motors: Ideal for experienced players and high-performance setups with a focus on durability and efficiency.
- RPM: Choose a motor with the right balance of speed and torque based on your playing style and setup.
