U2 12V-16V 300W 3.4Kg Brushless Thrust Underwater Thruster/Propeller/propulsion With Bi-directional control ESC For ROV and Boat

APISQUEEN U2 12V–16V Underwater Thruster

The APISQUEEN U2 is a compact, brushless underwater thruster designed for use in remotely operated vehicles (ROVs), small watercraft, DIY underwater vehicles, and auxiliary propulsion systems.
When used as a dual-thruster setup, the units can be coordinated to enable forward and reverse movement, as well as assisted steering, meeting the propulsion requirements for a wide range of surface and underwater projects.

Installation and Testing Video

List of items in the product set

Comparison of A300 and W300 Remote Controls

A300 Remote Control: Offers a control range of up to 200 meters and includes a cruise control function. This remote is not waterproof and is intended for use in dry environments.

W300 Waterproof Remote Control: Provides an extended control range of approximately 250–500 meters. It features a waterproof design, capable of withstanding submersion up to a depth of 1 meter. It includes a cruise control function, and the accompanying receiver supports automatic heading correction, which helps maintain a straight course. To ensure proper operation, the receiver (housed within the system's control box) must be installed in a horizontal position.

Which one should you choose? If you require standard remote operation over shorter distances, choose the A300. If you need waterproof capabilities and a longer control range for operating a vessel, choose the W300.

Dimension Drawing

Specifications

Operating Voltage: 12V–16V
Operating Current: 20–30A
Motor KV Rating: 500KV
Max Power: 600W
Continuous Power: 300W
Total Thrust: 3.4 kg (combined for dual thrusters)
Propulsion Speed: Approx. 2–4 km/h
Load Capacity: 0–250 kg
Suitable Environment: Freshwater / Seawater

ABOUT PWM 

PWM full name is (Pulse-width modulation). It is also called duty cycle signal, which indicates the proportion of the high level duration to the whole signal period. 2ms for the whole period of PWM, 1.5ms stop, 1.5-2ms forward, 1.5-1ms reverse.

From the diagram, we can clearly see that when PWM is 75% (1.5ms), the motor stops rotating, when PWM is 50% (1ms), the motor rotates in reverse, and when PWM is 100% (2ms) the motor rotates in forward.Of course ESC will not only make the motor turn forward and reverse, but can adjust the speed of motor rotation by the duty cycle size of PWM. When the PWM is gradually changed from 75% to 50%, the motor will keep reversing and accelerating from stop until the reverse rotation reaches the maximum. And when PWM is gradually changed from 75% to 100%, the motor is continuously accelerated from stop to forward until the forward rotation reaches the maximum value. That is, PWM is a signal that can be continuously varied, and the effective range is from 50% to 100%.

The frequency of PWM signal is 50hz, 100hz, 200hz or 500hz, etc. The higher the control frequency, the shorter the period, the shorter the control interval, and the faster the ESC and motor response speed The faster the ESC and motor response. Conversely, the lower the control frequency, the longer the period, the longer the control interval, and the slower the ESC and motor response.

U2 Single Thruster Test Table

FAQ

Q1: What kind of battery should be used with the U2?
The U2 has an operating voltage range of 12V–16V. The battery voltage must remain within this specified range, and the battery must be capable of providing sufficient current for the number of thrusters being used. For a dual-thruster setup, a 12V 50Ah LiFePO4 (lithium iron phosphate) battery is recommended. Actual runtime will depend on throttle settings, load, and operating conditions.

Q2: Is it noisy during operation?
It uses a brushless motor, which ensures quiet operation; at low speeds, the noise level is minimal.

Q3: What do CW and CCW mean in the context of underwater thrusters?
DESCRIPTION OF THE UNDERWATER THRUSTERS CW AND CCW