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click thumbnail to enlarge photos of AXi 4120/18

The AXi 4120/18 Gold Line brushless motor is suitable for large sailplanes weighing up to 4500g (158.7 oz) and sports aerobatic models up to 3500g (123.5 oz).

This particular motor is suitable for vintage, slow flying and trainer type model aircraft up to 3800g (134 oz) but would also suit a senior Telemaster on a 5s LiPo battery. The advantage of being an outrunner provides the ability to spin a large propeller without a gearbox, making this motor particularly suitable for flying scale models.

These brushless motors with neodymium magnets and a rotating case are manufactured using the latest technology from the finest quality materials. The hardened steel shaft supported by three ball bearings, and overall robust yet lightweight construction, ensure a long service life.

AXi motors are designed such that the propeller is mounted on the shaft, but a radial mount set is available as an option, to allow the motor to be mounted directly onto the firewall. This optional radial mount set includes: mounting flange, propeller adaptor, a securing collar and screws and is usually the preferred route for glow conversions.

Box Contents: -

  • AXi 4120/18 Brushless Motor
  • Specification sheet and manual
  • Transparent mounting template
  • "AXi Inside" decal

Not included with the AXi 4120/18: -

  • Prop adaptor (PH6 recommended) – not required if using radial mount set
  • Radial mount set (RMS41 recommended)
  • Connectors

Please retain the box and manual with your motor in the unlikely event of a warranty claim.

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Other AXi motors in this series: AXi 4120/14AXi 4120/14 Short-ShaftAXi 4120/20AXi 4120/20 Short-Shaft

Recommended brushless power setups for AXi 4120/18.
Need help finding a brushless motor setup? Try our motor calculator tool.

Model Model Weight Cells Max. Current Jeti ESC Propeller
Trainer 3800g (134.0oz) 5s 55.0A/60s Jeti Advance 70 Pro Opto 14" x 9"
Aerobatic 3500g (123.5oz) 5s 55.0A/60s Jeti Spin Pro 80 14" x 8"
3D 2600g (91.7oz) 5s 55.0A/60s Jeti Advance 70 Pro Opto 15" x 8"
3D 2300g (81.1oz) 4s 55.0A/60s Jeti Advance 70 Pro Opto 17" x 8"
3D 2900g (102.3oz) 6s 55.0A/60s Jeti Spin Pro 80 14" x 7"
Sailplane 4300g (151.7oz) 4s 55.0A/60s Jeti Advance 70 Pro Opto 17" x 9"
Sailplane 4500g (158.7oz) 5s 55.0A/60s Jeti Advance 70 Pro Opto 15" x 9.50"

Do not exceed the recommended propeller sizes.

Technical Details for AXi 4120/18

No. of cells (LiPo)5-7
RPM/V515 Kv
Max. Efficiency82%
No load current1.5A
Maximum Load55.0A
Internal Resistance0.070Ω
Diameter49.00mm (1.93")
Length55.00mm (2.17")
Shaft Diameter6.00mm (0.24")
Max. Efficiency Current
Glow Equivalent.46-60
Weight320.0g (11.3oz.)

very versatile
5/5 stars
By paul
I am using the AXI 4120/18 to power a World Models 1/5th scale clipped wing piper cub.

My setup is:
- 4120/18
- 5s lipo
- 14x7 APC Thin Electric

I could add an extra cell or go up slightly in prop diameter, but the level of power is just right on this setup. Not vertical, but enough power spare to help in those bad spots!

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$158.54 inc. VAT
Based on base price of £106.50 inc. VAT
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