SPM Avian 5055-500Kv Brushless Outrunner Motor M-SPMXAM4740

Overview

The Spektrum Avian 5055-500Kv Brushless Outrunner Motor is a premium electric motor designed specifically for fixed-wing aircraft and electric aeroplane conversions. This powerful mid-size brushless motor represents the pinnacle of modern RC electric propulsion technology, offering the perfect blend of reliability, performance and ease of use that makes it an ideal choice for both experienced RC pilots and those looking to upgrade their aircraft with brushless power. Whether you're converting a traditional glow-powered aeroplane to electric or building a new high-performance aircraft from scratch, the Spektrum Avian range has become the go-to solution for serious RC aviation enthusiasts across the UK and beyond.

Built by Spektrum, a recognised leader in RC hobby technology, the Avian 5055-500Kv motor delivers exceptional value and performance in a compact, lightweight package. The 500Kv rating makes this motor perfectly suited to larger aircraft models in the 7-11.5 lbs flying weight range, providing excellent torque characteristics and smooth power delivery across a wide throttle range. This brushless RC motor is engineered to work seamlessly with modern lithium polymer batteries and compatible electronic speed controllers, making it an essential component for serious RC aeroplane projects.

What truly sets the Spektrum Avian brushless motor apart is the combination of superior engineering, proven reliability and comprehensive included hardware. From the precision-balanced motor bell to the double-shielded sealed bearings and gold-plated bullet connectors, every component has been selected and manufactured to the highest standards. This is not just a motor; it's a complete propulsion solution that arrives ready to install with all the mounting hardware, adapters and connectors you need.

Key Features

• 14-Pole Stator Design — The 14-pole stator configuration delivers exceptionally smooth and precise propulsion characteristics, eliminating vibration and cogging that can compromise aircraft handling. This advanced stator design ensures consistent power delivery throughout the RPM range, resulting in more predictable and controllable flight characteristics that pilots appreciate whether flying 3D aerobatics or steady cruising flight.
• Rapid Acceleration and Extreme Torque — Expertly engineered with rare-earth neodymium magnets, this brushless RC motor delivers fast, smooth and precise acceleration that responds immediately to throttle input. The combination of high torque and rapid spool-up makes this motor ideal for demanding flight scenarios including aggressive manoeuvres, climb-outs and dynamic flying styles.
• Double-Shielded Sealed Bearings — Precision double-shielded sealed bearings eliminate contamination from dirt, moisture and debris, ensuring the motor maintains peak performance through countless flight sessions. This sealed design dramatically reduces maintenance requirements compared to unsealed bearings, allowing you to spend more time flying and less time servicing your equipment.
• Precision Balanced Motor Bell — Every motor bell is precision-balanced during manufacturing to exacting tolerances, eliminating vibration that could affect flight stability or cause structural stress to your aircraft. This attention to detail in manufacturing directly translates to smoother, more reliable flight performance and longer component lifespan.
• Gold-Plated Bullet Connectors — Pre-installed 4mm gold-plated bullet connectors provide superior electrical conductivity and corrosion resistance compared to standard connectors. Gold plating ensures consistent low-resistance electrical connections that maximise power transfer efficiency and reduce heat generation during flight.
• Excellent Cooling Design — The motor is specifically engineered to encourage efficient airflow through the stator and bell during operation, dissipating heat quickly and maintaining optimal operating temperatures. Effective cooling extends motor lifespan and maintains consistent performance even during extended flight sessions or aggressive flying.
• Lightweight Construction — Weighing just 298 grams (10.5 ounces), the Avian 5055-500Kv delivers impressive power whilst maintaining a minimal weight footprint. This lightweight design is critical for aircraft where every gram counts, allowing you to build or convert aircraft that remain within desired weight specifications without compromise.
• Complete Hardware Package Included — The motor arrives with all required installation hardware including an aluminium motor mount, propeller adapter and female ESC connectors. You won't need to source additional mounting brackets or adapters; everything needed for installation is included in the box.
• Spektrum Smart Technology Compatibility — This motor is the perfect match for the Spektrum Smart Avian 60 amp ESC, creating a seamlessly integrated propulsion system. Smart Technology compatibility enables advanced features and optimised performance when paired with compatible electronic speed controllers.
• Perfect Electric Conversion Upgrade — Specifically designed as the ideal replacement for .80 size glow combustion power systems, this motor enables straightforward brushed-to-brushless and combustion-to-electric conversions. Pilots can transform their existing aircraft into modern electric flying machines without extensive airframe modifications.

Technical Performance

The Spektrum Avian 5055-500Kv brushless outrunner motor represents state-of-the-art engineering in RC aircraft propulsion. At 50mm (1.97 inches) outer diameter and 55mm (2.17 inches) in length, this mid-size motor delivers an impressive power output of up to 900 watts, making it suitable for aircraft in the 3175g to 5215g (7 to 11.5 lbs) flying weight range. The 500Kv rating strikes an optimal balance between rotational speed and torque, delivering maximum output with standard propellers in the 15x6 to 15x8 size range. Operating voltage range of 18.5 to 22.2V (5S to 6S lithium polymer batteries) makes this motor compatible with modern battery technology widely available across the UK RC hobby market. Maximum current handling of 65A burst and 55A continuous ensures compatibility with high-performance electronic speed controllers. The 8mm diameter shaft with 20mm length accommodates standard RC aircraft propeller adapters. As a sensorless brushless motor, it requires no additional sensor wiring or configuration, simplifying installation and troubleshooting. The combination of rare-earth neodymium magnets, precision-balanced components and sealed bearing construction ensures reliable operation and minimal maintenance requirements throughout the motor's service life.

What's in the Box

• Spektrum Avian 5055-500Kv Brushless Outrunner Motor
• Pre-installed 4mm gold-plated bullet connectors
• Aluminium motor mount
• Propeller adapter
• Female ESC connectors
• Instruction Manual (Multilingual)

What You Need to Complete

• Electronic Speed Controller (ESC) — Spektrum Smart Avian 60A ESC recommended
• 5S or 6S Lithium Polymer (LiPo) Battery — 18.5V to 22.2V nominal voltage
• Propeller — 15x6, 15x7 or 15x8 electric propeller (exact size depends on aircraft)
• Aircraft airframe with compatible motor mount location
• RC receiver and transmitter system
• Battery charger for lithium polymer batteries

Frequently Asked Questions

• What is the 500Kv rating and how does it affect performance? — Kv (kilovolts) refers to the revolutions per minute (RPM) the motor produces per volt of input. A 500Kv motor will spin at approximately 500 RPM per volt applied, meaning at 22.2V (6S LiPo) the motor produces roughly 11,100 RPM under load. This 500Kv rating is specifically optimised for larger aircraft models between 7 and 11.5 lbs, delivering strong torque and excellent propeller efficiency with standard 15-inch propellers.
• Is this motor suitable for beginners or experienced pilots? — The Avian 5055-500Kv is best suited to pilots with moderate to advanced experience in RC aircraft. The power output and operating voltage require compatible high-capacity batteries and capable electronic speed controllers. Beginners should start with smaller, lower-power brushless motors or trainer aircraft designed for entry-level pilots. However, if you're converting an existing aircraft to brushless power, the straightforward installation and reliable performance make this an excellent choice.
• What battery does the Avian 5055-500Kv require? — This motor requires a 5S or 6S lithium polymer (LiPo) battery with a nominal voltage range of 18.5V to 22.2V. Typical capacity recommendations range from 4000mAh to 8000mAh depending on your aircraft weight and desired flight duration. Always match your battery capacity to your aircraft's weight specifications and ensure your ESC is rated for the voltage and current your battery can provide.
• How does this motor compare to other Spektrum Avian models? — Spektrum offers several Avian motor options with different Kv ratings for different aircraft sizes. The 500Kv rating sits in the mid-range, making it ideal for larger aircraft. Lower Kv motors (like the 230Kv or 250Kv models) produce more torque at lower RPM and suit very large, heavy aircraft. Higher Kv motors (like the 650Kv or 800Kv models) produce less torque but higher RPM, suiting smaller or lighter aircraft. Choose your Kv rating based on your aircraft weight and desired propeller size.
• Can I use this motor for electric aeroplane conversions from glow engines? — Yes, the Avian 5055-500Kv is specifically engineered as the perfect electric conversion upgrade for .80 size glow combustion power systems. This compatibility makes it an excellent choice for converting traditional nitro or petrol-powered aircraft to clean, efficient electric propulsion without extensive airframe modifications.
• What propeller sizes work with this motor? — The recommended propeller range is 15x6, 15x7 or 15x8 electric propellers. These sizes are optimised for the 500Kv rating and typical aircraft in the 7-11.5 lbs weight range. Always consult your aircraft's documentation and the motor manual to confirm the exact propeller specification, as incorrect propeller selection can damage the motor or cause unsafe flight characteristics.
• Does this motor require special maintenance? — One of the major advantages of brushless motors is their virtually maintenance-free operation. The double-shielded sealed bearings and sealed design protect internal components from dust and moisture, eliminating the need for regular cleaning or bearing maintenance. Simply ensure the motor is stored in a dry location and inspect connectors for corrosion periodically.
• What is the maximum power output and current draw? — This motor delivers a maximum wattage of 900W with peak burst current handling of 65A and continuous current handling of 55A. These specifications mean you should pair this motor with an electronic speed controller rated for at least 65A burst current, such as the Spektrum Smart Avian 60A ESC (which is capable of higher burst performance).

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 5055-500Kv Brushless Outrunner Motor M-SPMXAM4740 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.

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