The JM1 is an ultra-efficient sensorless permanent magnet synchronous motor that provides a high torque at low speeds, while retaining a high power density. The power to weight ratio of the JM1 exceeds that of all other motors in its class. Peak power output can best that of 250cc model aircraft engines.

Optimized for low weight, high power density applications, Joby Motors offerings consist of superior quality bearings with over 1,000 hours of reliability testing completed. High-strength Neodymium magnets ensure a long operating life with optimum performance, low weight, and high reliability.

The thickness and height of the anodized aluminum cooling fins have been optimized to provide high cooling rates while minimizing weight and drag, a critical factor in electric airplanes.

Windings available with voltages from 50 to 500V


JM1 Mounting dimensions Download a PDF version of this drawing

Winding Info

WindingKvBus Voltage
2T Wye 6-phase 220 35-45
2T Delta 180 40-50
3T Wye 6-phase 145 50-60
2T Wye 115 65-80
3T Delta 105 70-85
4T Delta 90 80-100
12T Wye 18 400-500

6-phase motors are for use with two hobby ESCs such as the Jeti Spin Pro 300 or Castle Creations HV160.

rpm/V at nominal load and rpm will be about 80% of listed kV

Test Data:

WindingPropellerVoltageLipo Cells (equiv.)Power In (kW)RPMThrust (kgf)
3T Wye 6-phase Xoar 30x10 50 14s 9.8 6100 34
3T Wye 6-phase Xoar 32x12 50 14s 13.5 5900 42
3T Wye 6-phase JC 26x12 65 17s 12.8 7500 36
3T Wye 6-phase Xoar 30x10 65 17s 17.3 7200 51
2T Wye Xoar 30x10 95 28s 13.5 6700 40

Motor Controller Options

Motor Controller Appropriate Windings Maximum LiPo Voltage
2x Castle Creations HV160 2T Wye 6-phase; 3T Wye 6-phase 12s
2x Jeti Spin Pro 300 2T Wye 6-phase; 3T Wye 6-phase 14s
MGM Compro 280120 2T Wye; 3T Delta, 4T Delta 28s

These are the motor controllers we have verified to work with the JM1. Contact us before attemping to use any other motor controller.

JM1_hot JM1_hot_1