Key Features

• All new FAI F3A competition-level contra rotating system.

• Nearly zero propeller reverse torque improves the straightness of the model plane.

• Thrust is approximately 20% higher than uniaxial systems (compared with DA4), with lower power consumption.

• Uniform speed effect enhances performance during descent and dive routes.

• Powered by a specially developed 3,000W high-RPM outrunner motor.

• CNC-machined pulley and inclined gears for quiet operation.

• CNC-made lightweight gearbox bracket.

• Hollow shaft design for both the main shaft and motor shaft.

• Optimized gear/belt ratio eliminates the need for a belt tensioning mechanism.

• Maintenance-free design—no lubricating oil required.

• Belt replacement cycle of 4,000 minutes (approximately 500 flights).

• Compatible with common after-firewall installation of F3A using optional Mount Kit. Also supports before-firewall installation for stunt model aircraft.

CRS3000 MKII.13 Specifications

• Weight (with spinner set): 545 ± 5 g

• Body Dimensions (mm): L: 86.9 × W: (front) 74.8, (rear) 95 × H: 99.1

• Front Shaft Diameter: 6 mm

• Rear Shaft Diameter: 16 mm

• Front Mounting Holes: 33 × 33 mm, 4 × M3

• Rear Mounting Holes:

  • Option A: 88 mm, 2 × M3

  • Option B: 70 × 50 mm, Φ4.2

• Nominal Voltage: 37V, 10S LiPo

• Torque @ Max Power: 7.74 N·m

• KV of Motor: 570 RPM/V

• Idle Current (Io @10V): 1.7 A

• Resistance (Ri): 16 mΩ

• Peak Current (15s): 82 A

• Peak Power (15s): 3034 W

• Cruising Power (8 mins): 1517 W

ESC & Configuration

• Recommended ESC: Dualsky SUMMIT 100HV

• Timing: Auto or 15–18 degrees

• Frequency: 24KHz

• Active Braking: Enabled

• Acceleration: +/- Soft

Propeller Options

• (1) 22×18F, 22×20R – 72A @ 37V

• (2) 22×20F, 22×20R – 83A @ 37V

Additional Components

• Spinner & Hubs: Spinner set 82_ Black and White (optional); some spinner sets sold separately

• Rear Stand-Off: Included, 2 × L30 mm, M3

• Maintenance Cycle: 4000 minutes (approx. 500 flights)

• Recommended Aircraft Weight: 4.5 kg to 6.5 kg

Applications

Suitable for class from 125E to 170E FAI F3A or sports/scale airplanes with wingspans from 70" to 78".