UDI RC High Speed Brushless Radio-Controlled Jet Boat – Inkfish Jet Boat

The UDI RC High Speed Brushless Jet Boat (Item UDI023PRO), known as the Inkfish Jet Boat, is an RC jet boat with water-jet propulsion and a water-cooled brushless motor. Its 362mm Shallow-V hull, made of high-strength ABS, is built to move through shallow and rocky water without the risk of an exposed propeller getting tangled in underwater obstacles.

Water-jet drive with hidden propeller

The jet pump structure is different from a conventional boat hull: the propeller is hidden, so debris and underwater obstacles don’t block it and there are no strict limits on water depth. The motor pressurizes the water flow in the duct through the blades, improving efficiency and thrust. The shallow draft, with the propulsion not extending beyond the power section of the hull, lets the boat run freely in shallow, rocky areas.

Brushless motor and marine ESC

The propulsion system is a 2812 KV3500 brushless motor, water-cooled. The ESC is a marine type, with an innovative waterproof design and integrated water cooling and heatsink. It includes low-voltage, overheat and locked-motor protection.

2.4GHz radio with alarms

The UA37 radio system works at 2.4GHz, with long range and high output. It features dual low-battery and out-of-range alarms, so you can keep track of the boat’s status and avoid losing it. The 4-channel receiver has a built-in gyroscope.

Self-righting hull and impact protection

If the boat capsizes, press the function key once, with the battery not in a low-power state (see manual), and the boat returns to its normal position. A rubber anti-collision strip built into the bow helps reduce hull damage in case of impact. Steering is handled by an integrated 9g waterproof high-torque servo.

LED navigation lights

The front and rear navigation lights are controlled from the transmitter and let you keep track of the boat’s position even in the evening.

Battery and charger included

The box includes a 7.4V 2000mAh lithium battery with a USB balance charger, so you don’t need to buy extra accessories to get started.

Package contents

• Boat with ESC and motor
• 2.4GHz transmitter
• Rechargeable battery
• Charger
• Maintenance tools
• User manual

What you’ll need

• 4 x 1.5V AAA batteries for the transmitter (not included)

Technical specifications

• Recommended age: 14+
• Hull type: Shallow-V, 32° deadrise angle
• Hull material: high-strength ABS
• Length: 362mm
• Width: 127mm
• Height: 110mm
• Weight: approx. 659g
• Speed: approx. 20 km/h
• Running time: approx. 10 minutes
• Motor: KV3500 brushless, water-cooled (28mm diameter, 21mm length, 49.4g, 3.5mm bullet connectors)
• ESC: marine, waterproof, water-cooled
• Receiver: 4-channel with built-in gyroscope
• Steering servo: 9g waterproof high-torque
• Radio: UA37 2.4GHz, range approx. 100m
• Battery: 7.4V 2000mAh lithium
• Charger: 2-cell USB balance charger, output 7.4V 1500mA max
• Charging time: approx. 230 minutes