Overview
The SPM Avian 3521-750KV Outrunner Brushless Motor is a high-quality brushless motor from Spektrum, a recognised leader in spread spectrum technology and RC innovation. This 14-pole outrunner motor delivers reliable performance for RC enthusiasts looking to upgrade their RC car UK setups with professional-grade propulsion. Whether you are building a custom RC vehicle, upgrading an existing model, or looking for a brushless RC motor that combines durability with smooth power delivery, the Avian 3521-750KV offers the engineering excellence that Spektrum is known for throughout the RC hobby community.
With its 750KV rating, this outrunner brushless motor is engineered to provide efficient power transfer and consistent performance across a wide range of RC applications. The 14-pole configuration ensures smooth acceleration and stable rpm characteristics, making this motor a trusted choice for both competitive racers and weekend bashers alike. As an outrunner design, this motor features excellent heat dissipation and is built to withstand the demands of regular RC use, whether you are pushing your vehicle to the limit on the track or enjoying casual backyard flying or driving sessions.
RC Model Shop stocks the full Spektrum range of genuine RC accessories and components, ensuring you get authentic Spektrum engineering with full warranty support. The Avian brushless motor range represents the pinnacle of motor design, offering the performance characteristics that serious RC enthusiasts demand when they are looking to optimise their ready to run RC models or custom builds.
Key Features
- 750KV Rating — The 750KV specification means this motor will spin at approximately 750 revolutions per volt, making it suitable for a range of RC applications where moderate to high speed performance is desired, delivering the right balance between acceleration and top speed.
- 14-Pole Design — The 14-pole stator configuration provides exceptional smoothness and efficiency compared to lower pole-count alternatives, resulting in more stable rpm delivery, reduced cogging, and improved overall motor responsiveness during driving or flight.
- Outrunner Configuration — An outrunner brushless motor design means the outer case rotates whilst the stator remains stationary, which delivers superior torque characteristics and excellent heat dissipation properties, keeping the motor cooler during extended use and extending component lifespan.
- Brushless Technology — Brushless motors offer significantly longer lifespan compared to brushed alternatives, require minimal maintenance, generate less electrical noise, and deliver more consistent power output with superior efficiency across the full throttle range.
- Spektrum Engineering — Built by Spektrum, a recognised leader in spread spectrum technology, this motor benefits from decades of RC engineering expertise, rigorous quality control, and proven reliability that make it a trusted choice for RC enthusiasts throughout the UK and worldwide.
Technical Performance
The SPM Avian 3521-750KV Outrunner Brushless Motor represents precision engineering designed for demanding RC applications. The 750KV rating combined with the 14-pole construction delivers smooth, efficient power delivery with minimal vibration and excellent responsiveness. This outrunner brushless motor design excels at heat management, allowing extended run times without thermal throttling or performance degradation. The brushless architecture eliminates carbon brush wear, dramatically reducing maintenance requirements whilst improving overall efficiency and power consistency. Whether you are integrating this motor into a custom RC build, upgrading an existing brushless RC car, or seeking a reliable motor component for racing applications, the Avian 3521-750KV provides the professional-grade performance and build quality that reflects Spektrum's commitment to innovation and excellence in the RC hobby market. The outrunner configuration ensures optimal torque delivery whilst maintaining the compact form factor necessary for modern RC vehicle integration.
What's in the Box
- SPM Avian 3521-750KV Outrunner Brushless Motor
Frequently Asked Questions
- What is the 750KV specification and what does it mean for my RC car? — The 750KV rating indicates that the motor will spin at approximately 750 revolutions per minute (RPM) for every volt of electrical power supplied. This moderate KV rating makes the Avian 3521-750KV suitable for RC vehicles where you want balanced performance between acceleration and top speed, rather than extreme speed or extreme torque. Higher KV motors spin faster but produce less torque, whilst lower KV motors produce more torque but spin slower. For most RC car UK applications, 750KV represents an excellent middle ground.
- What does 14-pole mean and why does it matter? — The 14-pole configuration refers to the number of magnetic poles in the motor's stator. More poles generally result in smoother operation, better efficiency, and more consistent rpm delivery compared to motors with fewer poles. The 14-pole design in the Avian 3521-750KV ensures you get smooth acceleration, reduced cogging, and improved responsiveness, which translates to better handling characteristics in your RC vehicle.
- Is this an outrunner or inrunner motor, and what's the difference? — This is an outrunner brushless motor, meaning the outer can (bell) rotates around the stationary stator windings. Outrunner motors typically produce more torque at lower RPM and offer superior heat dissipation compared to inrunner designs, making them excellent for applications where smooth power delivery and thermal management are priorities. The rotating outer case of an outrunner also means you can directly attach a propeller or other load without a gearbox, which is one advantage of this design.
- What ESC and battery type does this motor require? — The source materials do not specify ESC compatibility or battery requirements for this motor. We recommend contacting RC Model Shop or consulting the full Spektrum product documentation to determine the correct ESC rating and battery configuration for your specific application, as these will depend on your intended use case and vehicle setup.
- Is this motor suitable for beginners? — Whilst this is a high-quality brushless motor from a respected manufacturer, successfully integrating any motor into an RC application requires knowledge of electronics, ESC programming, and mechanical assembly. Beginners new to brushless RC should consider purchasing ready to run RC models or seeking expert advice before attempting custom motor installations.
- What vehicles can I use this motor in? — The source materials do not specify particular vehicle applications for this motor. The 750KV outrunner design makes it versatile across multiple RC platforms, but you should verify compatibility with your specific vehicle, ESC, and power system before purchasing. RC Model Shop staff can provide recommendations based on your intended application.
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 SPM Avian 3521-750KV Outrunner Brushless Motor 14-Pole M-SPMXAM0750 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.
