Spektrum Firma 2436 4500Kv Motor Overview
The feature-packed SpektrumT FirmaT 4500Kv Brushless Motor is a perfect option for 1/16 - 1/18 scale vehicles with a 2S-3S LiPo battery. It features a low-cog 4-pole rotor design, CNC machined aluminum housing, insulated high-purity copper windings, a high-quality alloy steel output shaft, and precision bearings for high durability and smooth rotation.
Spektrum Firma 2436 4500Kv Motor Features
- 2-3S LiPo power compatible
- Designed for efficiency
- 4-Pole sintered rotor
- Hardened steel output shaft
- Precision ball bearings
Overview
The Spektrum Firma 2436 4500Kv 4-Pole Sensorless Brushless Motor is purpose-built for mini-scale RC vehicles, delivering exceptional performance in a compact package. This is the ideal brushless RC motor for 1/16 to 1/18 scale cars and crawlers that demand reliability, efficiency and smooth power delivery. Whether you're exploring the world of brushless RC for the first time or you're an experienced enthusiast looking for a dependable mini motor, this Spektrum Firma motor represents excellent value and proven engineering. It's designed to work seamlessly with 2S to 3S LiPo battery systems, making it compatible with the most common battery configurations used in UK RC shops and hobby collections.
Built with precision engineering and manufactured to exacting standards, the Firma 2436 features a low-cog 4-pole rotor design that ensures efficient power delivery and smooth acceleration. The motor's compact size makes it perfect for tight engine bays in mini RC vehicles, whilst the powerful 4500Kv rating provides the speed and torque characteristics needed for both racing and casual bashing. This sensorless brushless motor operates without requiring external sensors, simplifying installation and reducing overall system complexity. The result is a motor that's easy to set up, reliable in operation, and built to last through countless hours of RC driving enjoyment.
Key Features
- 4-Pole Sintered Rotor Design — The low-cog 4-pole rotor construction delivers efficient power transfer with minimal energy loss, allowing your mini RC vehicle to accelerate smoothly and maintain consistent speed across varying throttle inputs.
- 4500Kv Rating — This Kv specification means the motor spins approximately 4500 revolutions per minute per volt of input, providing the perfect balance of speed and torque for 1/16 to 1/18 scale vehicles running 2S or 3S LiPo batteries.
- Sensorless Brushless Technology — Operating without onboard Hall sensors simplifies wiring and installation, reduces cost, and eliminates potential sensor-related failures, whilst maintaining reliable commutation for consistent performance.
- CNC Machined Aluminium Housing — Precision-engineered from lightweight aluminium using computer numerical control machining, the housing ensures perfect tolerances, superior heat dissipation, and exceptional durability for extended lifespan.
- Hardened Steel Output Shaft — The high-quality alloy steel shaft is built to withstand the stresses of acceleration, deceleration and impacts, providing reliable power transmission to your drive train without warping or fracturing.
- Insulated High-Purity Copper Windings — Premium copper wire with protective insulation minimises resistance, reduces heat generation, and maximises electrical efficiency, allowing more of your battery's energy to be converted into movement.
- Precision Ball Bearings — High-quality roller bearings at both ends of the motor shaft ensure smooth rotation, minimal friction, and long operational life even under continuous use in competitive or casual RC driving.
- 2-3S LiPo Compatibility — This motor is engineered to work perfectly with standard 2-cell and 3-cell lithium polymer battery packs, the most common power sources in the UK RC hobby community.
Technical Performance
The Spektrum Firma 2436 represents a significant step forward in brushless motor technology for mini-scale RC applications. The 2436 motor diameter and 45.8mm length make this motor compact enough for the tightest engine bays whilst remaining powerful enough to deliver thrilling acceleration and top-end speed. At 4500Kv, this motor is specifically calibrated to achieve optimal RPM with 2S and 3S LiPo batteries, avoiding the extremes of over-spinning on higher voltages or losing torque on lower voltages. The 4-pole rotor design with sintered magnets creates a stable magnetic field that commutates smoothly through each electrical cycle, resulting in responsive throttle control and predictable performance in both forward and reverse.
Construction quality distinguishes this motor from budget alternatives. The CNC-machined aluminium housing isn't merely cosmetic—it serves critical functions including precise bearing alignment, heat dissipation, and structural rigidity. The insulated high-purity copper windings are carefully wound to specification, ensuring optimal magnetic coupling between the stator and rotor whilst maintaining electrical safety. The hardened steel output shaft resists the tremendous forces generated by acceleration and deceleration cycles, protecting against the catastrophic failure that can occur when inferior shafts bend or snap under sustained use. Precision ball bearings at both rotor points reduce friction to absolute minimums, meaning less energy wasted as heat and more energy converted to rotational force. This engineering approach ensures that every amp-hour of energy drawn from your LiPo battery translates into maximum velocity and acceleration for your RC vehicle.
What's in the Box
- Spektrum Firma 2436 4500Kv 4-Pole Sensorless Brushless Motor
What You Need to Complete
- Brushless ESC (Electronic Speed Controller) rated for brushless motors—choose a 30A or 40A model appropriate for 2S-3S LiPo applications
- 2S or 3S LiPo battery pack with appropriate connector compatibility
- Radio control system with receiver compatible with your ESC
- Vehicle chassis and drive train components suitable for 1/16 to 1/18 scale RC cars
- Motor mounting hardware and screws appropriate for your vehicle's engine bay
- Bullet connectors if your ESC or battery doesn't match the motor's connector type
Frequently Asked Questions
- Is the Spektrum Firma 2436 4500Kv motor suitable for beginners to RC brushless driving? — Yes, this motor is excellent for brushless beginners. The sensorless design simplifies installation because it requires no sensor wire connections, and the straightforward 2S-3S LiPo compatibility aligns perfectly with beginner-level battery choices. The 4500Kv rating provides predictable, controllable power delivery rather than extreme acceleration that challenges new drivers. Many UK RC retailers recommend this motor to customers transitioning from brushed to brushless systems.
- What battery does the Spektrum Firma 2436 motor need? — This motor is designed for 2S to 3S LiPo (lithium polymer) battery packs. A 2S pack provides approximately 7.4 volts nominal, whilst a 3S pack delivers 11.1 volts nominal. With the 4500Kv rating, you can expect RPM between approximately 33,000 on 2S and 50,000 on 3S. For mini-scale vehicles, popular battery capacities range from 450mAh to 2400mAh depending on desired runtime and weight constraints.
- How does the sensorless design compare to sensored brushless motors? — Sensorless motors like the Firma 2436 detect rotor position through back-EMF voltage signals rather than onboard Hall sensors. For most applications including this mini-scale motor, sensorless operation is indistinguishable from sensored operation, offering simpler wiring, lower cost, and equal reliability. Sensored motors primarily benefit applications requiring extremely low-RPM crawling or demanding full control authority at zero speed, scenarios less relevant to mini-scale RC vehicles.
- What makes the 4-pole design better than other rotor configurations? — The 4-pole rotor provides four magnetic poles that interact with the stator windings, creating four commutation cycles per motor rotation. This design balances torque smoothness with efficiency, avoiding the cogging issues of fewer poles whilst maintaining the compact size needed for mini-scale applications. The sintered magnet construction ensures consistent magnetic strength across the lifespan of the motor.
- Can I use the Firma 2436 motor in my existing RC vehicle? — The motor's 2436 size and compact 45.8mm length fit most 1/16 to 1/18 scale vehicle platforms. Verify your vehicle's motor mount specifications and ensure your ESC supports 4500Kv sensorless brushless motors. Most modern Spektrum Smart ESCs and aftermarket alternatives handle this motor perfectly. Check your vehicle's connector type—if different from the motor's connectors, you'll need appropriate adapters.
- Is this motor waterproof for wet conditions? — The Firma 2436 is not specified as water-resistant or waterproof. For wet-weather RC driving or water crossings, consider alternative motors specifically rated for waterproof operation, or use appropriate protective electronics housings and connectors to shield the motor from direct water contact.
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 Firma 2436 4500Kv 4-Pole Sensorless Brushless Motor: Minis M-SPMXSM4000 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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