MAD 9x-12 Drone Arm Set Coaxial Propulsion System: M9C12 100KV, Circular 60A FOC ESC, 30x10 Prop

MAD

$558.00 USD

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Motor KV 100KV

Rotation Direction CW CCW

Led Light Red Green

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Overview

MAD 9x-12 is a drone arm set designed as an upper and lower coaxial structure power system for multirotor aircraft. It is developed for a single axle load of 4.5–6 kg, focusing on force efficiency, safety, and endurance under extreme conditions, and is suitable for aircraft using a 30 mm diameter carbon tube.

Key Features

Integrated propulsion system with single-arm modular design for convenient installation and a reliable structure.
Disc motor design (M9C12) with iron-core design and EZO bearings (Japan) and assembly technology intended to reduce axial/radial clearance for stable operation.
Intelligent sine-wave electric modulation using a Circular 60A FOC intelligent electric regulator with protections including over-voltage, over-current, over-temperature, locked rotor, short circuit, and motor disconnection.
Red/green LED heading light integrated at the bottom of the power pack.
Carbon fiber propeller (Fluxer 30x10.0 Pro) with mirror light treatment process and dynamic balance design.

For pre-sales compatibility checks (Ardupilot/DroneCAN integration, wiring length, 30 mm tube fitment) or after-sales support, contact https://rcdrone.top/ or email support@rcdrone.top.

Specifications

System (9X12 KV100)

Item	Specification
Max thrust	11952 g / rotor @48v (sea level)
Recommended take-off weight	4400 g–6200 g / rotor @48v (sea level)
Recommended voltage	12S Lipo
Operating temperature	-20~60C
Unit combo weight	830 g
Extension wire length	1300 mm / 1300 mm (Input/Signal Wires)
Compatible carbon tube	30 mm

Propeller

Item	Specification
Diameter / pitch	30x10.0 inch (762x254 mm)
Unit weight	93 g (p/p)

Motor

Item	Specification
Stator size	91x12 mm
Unit weight	483 g

FOC ESC

Item	Specification
Model name	Circular 60A FOC
Max input voltage	60.9 V
Maximum allowable current	60A (10S)
Maximum continuous current	30A
Max throtle signal frequency	450 Hz
Recommended voltage	12S
Compatibility	Ardupilot
CAN communication	DroneCan

Product drawing (dimensions)

Item	Dimension
Overall propeller span	813.70
Motor/module diameter	Ø98.5
Module length	63.05
Vertical dimension	75.25
Vertical dimension	25.85
Tube clamp height	39
Compatible tube diameter	Ø30
Mounting pattern	Ø23-M4*4
Mounting pattern	Ø20-M3*4

Benchmark (12S)

Setup: MAD 9X12 100KV + FLUXER PRO 30x10 MATT + Circular FOC 60A (6-14S) MAX: 81C

Throttle [%]	Voltage [V]	Current [A]	Input Power [W]	Output Power [W]	Torque [N×m]	RPM	Thrust [gf]	Efficiency [%]	Efficiency [gf/W]
30	48.76	2.38	116.0	85.8	0.576	1422	1722	74.0	14.8
35	48.88	3.69	180.4	138.4	0.793	1667	2372	76.7	13.1
40	48.52	5.42	263.0	209.8	1.058	1894	3155	79.8	12.0
45	48.30	7.22	348.7	284.5	1.288	2109	3813	81.6	10.9
50	48.14	9.30	447.7	369.5	1.524	2318	4483	82.6	10.0
55	48.04	11.77	565.4	475.9	1.807	2515	5251	84.2	9.3
60	47.95	15.13	725.5	617.3	2.185	2698	6228	85.1	8.6
65	47.84	18.63	891.3	756.0	2.512	2874	7346	84.8	8.2
70	47.76	21.48	1025.9	870.8	2.731	3045	7960	84.9	7.8
75	47.59	26.83	1276.8	1077.4	3.207	3208	9223	84.4	7.2
80	47.46	31.41	1490.7	1243.8	3.534	3361	10070	83.4	6.8
85	47.31	36.14	1709.8	1413.6	3.847	3509	10849	82.7	6.3
90	47.18	40.94	1931.5	1582.0	4.139	3650	11545	81.9	6.0
95	47.12	42.80	2016.7	1640.3	4.230	3703	11742	81.3	5.8
100	47.10	42.82	2016.8	1637.7	4.221	3705	11952	81.2	5.9

Use the powertrain correctly according to the performance parameters above. It is recommended to fly at the recommended takeoff weight for best performance. Do not fly overweight. If the takeoff weight exceeds 1.2 times the maximum recommended value, performance and safety will be seriously affected.

Troubleshooting (LED Indicator/Sound)

LED Indicator/Sound	Cause	Solution
The motor does not turn after the aircraft is unlocked, but only after the throttle is raised.	Flight control or remote control output unlocked idle throttle value less than 1100us.	Set the idle throttle value of the flight control or remote control to be greater than 1100us. 1160us~1180us is recommended.
When the plane is powered on, connect the remote control and the motor turns.	The remote control is set to lock the throttle over 1100us, or close to 1100us.	The remote control needs to set the lock throttle less than or equal to 1050us.
When the power-on self-test fails, the motor “beeps” every 1.5 seconds, and the indicator light flashes yellow briefly.	The throttle PWM signal is missing or the identification throttle PWM range is incorrect.	Ensure that the throttle signal cable is properly connected, and check whether the signal cable is damaged.
When the power-on self-test fails, the motor “beeps” every 0.5 seconds, and the indicator light flashes yellow briefly.	Detects high throttle when get power and enters protected state.	Make sure that the electric self-test passes before lifting the throttle.
The motor does not sound. The indicator light flashes yellow 4 times every 1.5 seconds: “short - short - short - long”.	If the power-on self-test fails, the motor line loop may be disconnected.	Open the ESC cover and check whether the three motor wires are well welded.
The motor does not sound. The indicator light flashes yellow 4 times every 1.5 seconds: “long - short - long - short”.	The power-on self-test fails, and the power supply voltage is abnormal.	Check whether the battery voltage is normal. Check whether the power cable is properly connected.
The motor does not sound. The indicator light flashes yellow 4 times every 1.5 seconds: other flashing methods.	The power-on self-test fails, and the electrical hardware is abnormal.	Record the LED flashing mode video and contact customer service for assistance. Replace the ESC and test again if required.
The power-on self-test is normal, the motor does not turn after unlocking, and the indicator light is yellow for 0.5 seconds - the motor does not sound when the indicator light is off for 0.5 seconds.	Motor startup failure, blocking protection occurred during startup.	Power on and off again and restart the power supply. If it reappears, check whether the motor is damaged.
The power-on self-test is normal, the motor does not turn during operation, indicator light: 0.5 seconds yellow light - 0.5 seconds off, the motor does not sound.	The motor is blocked and entered the protection state.	Check whether the machine is blocked, and check whether the motor is smooth by hand.
The power-on self-test is normal, the motor does not start or stops midway, indicator light: 1 second yellow light - 1 second off, the motor does not sound.	Short circuit or overcurrent protection occurs, and the device enters the protection state.	Disassemble the electric adjusting cover and check whether the motor line is damaged and whether the copper terminal of the motor line is loose.
The indicator light flashes alternately red and green during operation.	The PWM throttle signal is missing.	Land safely and check whether the PWM signal line is well connected and whether the signal line is damaged.
The indicator light flashes yellow every 0.2 seconds during operation.	The motor controller detects high temperature.	After the aircraft lands and stops, check whether the temperature of the ESC shell is too high. If the temperature is high, check whether the screws of the wiring position of the ESC are loose.

Indicator Lights and Audible Alerts for Motor Controller - Rapid Troubleshooting

When in use, rely on the status indicator lights and audible alerts to assess whether the product is functioning properly. If any abnormalities occur, troubleshoot the issues.

Fault During Self-Check

Fault Symptoms	Possible Causes	Solution
Power-on self-test failure, the motor emits a “beep” sound every 1.5 seconds, accompanied by a brief yellow flashing indicator light.	Loss or misidentification of throttle PWM signal. Throttle PWM range is incorrect.	Ensure the throttle signal wire is well-connected. Check for any damage to the signal wire.
Power-on self-test failure, the motor emits a “beep” sound every 0.5 seconds, accompanied by a brief yellow flashing indicator light.	High throttle detected during power-on, entering protection mode.	Ensure that the motor controller has passed the self-check before increasing the throttle.
Power-on self-test failure, the motor is silent, and the indicator light flashes a sequence of four short intervals every 1.5 seconds: “short-short-short-long” in yellow.	Power-on self-test failure, the motor circuit may be disconnected.	Open the motor controller cover and check if the three motor wires are securely locked.
Power-on self-test failure, the motor is silent, and the indicator light flashes a sequence of four short intervals every 1.5 seconds: “short intervals every 1.5 seconds” in yellow.	Power-on self-test failure, abnormal supply voltage.	Check if the battery voltage is normal; inspect the power supply line for proper connection.
Power-on self-test failure, the motor is silent, and the indicator light flashes a sequence of four short intervals every 1.5 seconds with a yellow light: other flashing patterns.	Power-on self-test failure, abnormality detected in motor controller hardware.	Record the LED flashing pattern on video. Contact customer service for a replacement motor controller and conduct further testing.

Fault During Operation

Fault Symptoms	Possible Causes	Solution
The motors do not spin after the aircraft is unlocked; they start spinning only after increasing the throttle.	The flight controller or remote controller outputs unlocked idle; throttle value is less than 1100 microseconds.	Set the flight controller or remote controller to output idle with a throttle value greater than 1100 microseconds; recommended range 1160uS to 1180uS.
After powering on the aircraft and connecting the remote controller, the motors start spinning.	The remote controller is set to lock the throttle at a value above 1100 microseconds or close to 1100 microseconds.	The remote controller needs to be set to lock the throttle at a value less than or equal to 1050 microseconds.
Power-on self-test is normal, but the motors do not spin after unlocking. Indicator light: 0.5 seconds of yellow light followed by 0.5 seconds off, and the motors do not produce any sound.	The motor startup failed, encountering stall protection during the startup process.	Power cycle (turn power on and off). If the issue persists, check whether the motor is damaged.
Power-on self-test is normal, but the motors do not spin after unlocking. Indicator light: 0.5 seconds of yellow light followed by 0.5 seconds off, and the motors do not produce any sound.	The motor controller detects motor stall and enters protection mode.	Check if the motor is stalled due to a crash and inspect whether the motor rotation is smooth.
Power-on self-test is normal, but the motors do not spin after unlocking. Indicator light: 1 second of yellow light followed by 1 second off, and the motors do not produce any sound.	Short circuit or overcurrent protection triggered, entering protection mode.	Open the motor controller cover and inspect whether there is any damage to the motor wires and if the copper connections on the motor wires are loose.
During operation, the indicator light alternately flashes red and green.	The motor controller detects a loss of PWM throttle signal.	Land safely, check if the PWM signal line is well-connected, and inspect for any damage to the signal line.
During operation, the indicator light rapidly flashes yellow every 0.2 seconds.	The motor controller detects high temperature.	After landing and stopping the aircraft, check if the motor controller’s casing is too hot. If the temperature is high, inspect whether the wire terminal screws are loose.
Power-on self-test failure, the motor is silent, and the indicator light flashes a sequence of four short intervals every 1.5 seconds: “short”-“long”-“short”-“short” in yellow.	Power-on self-test failure, abnormal voltage on the motor wires.	Check for any short circuits between the motor wires and the main bus in the motor controller. Inspect whether the motor wires are damaged and whether there is a short circuit with the casing.

Details

The MAD 9x12 drone arm set uses an integrated propulsion module with a 30mm carbon-tube clamp and labeled M9C12 motor and 60A 14S ESC layout.

The M9C12 disc motor pairs with a circular 60A FOC regulator using sine-wave driving mode for smoother power delivery.

The MAD setup features a carbon fiber propeller and a built-in red/green LED heading light for clearer orientation.

The propeller drawing lists an 813.70 mm overall span and shows the hub mounting hole patterns (Ø23 M4×4 and Ø20 M3×4) for fit checks.

The 9X12 KV100 parameter sheet lists 12S LiPo support, 11,952g max thrust per rotor at 48V (sea level), and 30mm carbon tube compatibility.

MAD 9x12 100KV 12S benchmark data lists throttle steps with voltage, current, RPM, thrust, and efficiency, with a noted max temperature of 81°C.

The ESC troubleshooting guide matches LED indicator and beep patterns to common causes and wiring checks for quicker diagnosis.

Motor controller LED flash patterns and audible beeps provide quick guidance on likely faults and recommended checks.

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MAD 9x-12 Drone Arm Set Coaxial Propulsion System: M9C12 100KV, Circular 60A FOC ESC, 30x10 Prop