Overview
The CASTLE Water Jacket for 15 Series Motors is a precision-engineered aluminium cooling solution designed specifically for RC boat enthusiasts who demand maximum thermal management and consistent performance. Whether you're running a high-performance monohull, engaging in competitive marine racing, or simply pushing your brushless RC boat to its limits, this water jacket provides the essential heat dissipation needed to keep your motor operating at peak efficiency during extended runs and aggressive manoeuvres. Castle Creations, recognised leaders in RC power systems, have designed this cooling jacket with the same precision engineering and attention to detail that defines their entire product range.
This aluminium water jacket is an essential upgrade for anyone serious about RC boat performance. If you're piloting an RC boat up to 36 inches in length and want to maximise motor longevity whilst maintaining consistent power delivery, this is the accessory you need. The water jacket represents Castle's commitment to providing marine enthusiasts with purpose-built solutions that go beyond standard air-cooling, delivering the thermal control that high-performance watercraft demand. Whether you're a seasoned RC boat racer in the UK or a dedicated basher looking to protect your investment, this cooling jacket is engineered to handle the demands of marine motorsport.
Castle's legacy of overpowering surface craft doesn't stop at land — it goes full throttle into water. Their marine product lineup is purpose-built for high-performance RC boats that demand brutal torque, thermal control, and bulletproof reliability. The 15 Series Water Jacket represents the pinnacle of this philosophy, offering a precision-machined solution for maximum heat dissipation and consistent performance during long pulls and hard turns.
Key Features
- Precision-Machined Aluminium Construction — This cooling jacket is manufactured from high-quality aluminium using CNC machining techniques, ensuring precise tolerances and exceptional durability that will withstand the demanding environment of saltwater and freshwater RC boat operation.
- Optimised for 15 Series Motors — Specifically engineered to fit Castle's 15 Series brushless motors, this jacket integrates seamlessly with your existing setup, providing a direct upgrade path for enhanced thermal management without requiring additional modifications or compatibility concerns.
- Enhanced Heat Dissipation — Designed with water-cooling capabilities, this jacket allows coolant to flow directly around the motor, removing excess heat far more effectively than traditional air-cooled heatsinks and maintaining optimal operating temperatures even during sustained high-power applications.
- Extends Motor Lifespan — By maintaining lower operating temperatures, this cooling solution reduces thermal stress on motor windings and bearings, directly extending the operational lifespan of your brushless motor and protecting your investment in quality RC equipment.
- Maintains Consistent Performance — Consistent thermal management ensures that your motor delivers reliable power output throughout extended racing sessions or bashing runs, eliminating performance drops caused by thermal throttling or overheating.
- Professional-Grade Engineering — Manufactured to Castle's exacting standards, this water jacket reflects the same commitment to quality and performance that has made Castle a trusted name amongst RC enthusiasts, racers, and speed record chasers worldwide.
Technical Performance
The CASTLE Water Jacket represents the cutting edge of RC marine thermal management technology. Crafted from high-grade aluminium and precision-machined for perfect fitment, this cooling jacket is engineered to work with Castle's 15 Series brushless motors, which are commonly found in high-performance RC boat setups. The water-cooled design allows thermal transfer through flowing coolant, dramatically improving heat removal compared to passive air cooling. This is particularly crucial in marine applications where sustained acceleration, prolonged high-throttle runs, and intense manoeuvring generate significant thermal loads. The jacket's CNC-machined construction ensures dimensional accuracy and proper seating against the motor body, maximising contact area for efficient heat transfer. By maintaining lower operating temperatures, the water jacket helps preserve motor efficiency, prevents thermal derating, and ensures that both the stator windings and rotor assembly remain within safe operating parameters even during competitive racing or aggressive recreational use. For anyone operating a high-performance RC boat up to 36 inches in length with demanding power requirements, this cooling jacket is an essential component that transforms your thermal management capabilities and unlocks the full potential of your brushless motor system.
What's in the Box
- CASTLE Water Jacket — Aluminium, CNC-machined cooling jacket compatible with 15 Series motors
Frequently Asked Questions
- What motor sizes does this water jacket fit? — This cooling jacket is specifically designed for Castle's 15 Series brushless motors. The 15 Series designation refers to motor dimensions of 15mm diameter, making this jacket compatible across all 15 Series variants in Castle's motor lineup.
- How much does this improve cooling performance? — Water-cooling systems are dramatically more effective than air cooling at removing heat from electric motors. By allowing coolant to circulate directly around the motor body, this jacket provides superior thermal transfer compared to passive air-cooled designs, helping maintain lower operating temperatures during sustained high-power applications.
- Can I use this with any Castle ESC? — This water jacket is a motor accessory that works independently of your electronic speed controller. It's compatible with any ESC that can drive Castle's 15 Series motors, including the Hydra Cobra series and other Castle marine ESCs designed for high-performance watercraft.
- Is this suitable for freshwater and saltwater use? — The aluminium construction is appropriate for RC boat use in both environments. As with all marine RC equipment, regular rinsing with fresh water after saltwater operation is recommended to maintain long-term durability.
- What size RC boats is this designed for? — This cooling jacket is engineered for high-performance monohulls and racing craft, with Castle's marine lineup supporting boats up to 36 inches in length for the standard Cobra series, and up to 50 inches for the high-voltage Hydra Cobra 5 HV series.
- Do I need a water cooling system pump? — This jacket is the cooling component itself; you'll need a complete water cooling system setup including pump, radiator, tubing, and coolant to operate this jacket. Castle and third-party marine suppliers offer integrated water-cooling kits compatible with this jacket.
- Why choose water cooling over air cooling? — Water cooling provides superior thermal management because liquid coolant has higher heat capacity and thermal conductivity than air. This allows more efficient heat transfer away from the motor, enabling higher sustained power output, longer run times at full throttle, and extended motor lifespan through reduced thermal stress.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the CASTLE Water Jacket, Aluminum, 15 Series Motors M-CC011-0170-00 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
