HOBBYWING PLATINUM 4120SL 500KV FIXED WING MOTOR HW30416001

Overview

The Hobbywing Platinum 4120SL 500KV fixed wing motor represents the pinnacle of high-performance RC aircraft propulsion technology. Engineered for serious RC plane enthusiasts and competitive pilots across the UK, this brushless outrunner motor delivers exceptional efficiency, reliability and power in a compact, lightweight package. Whether you're flying fixed-wing aircraft, UAVs or racing drones, the Platinum 4120SL 500KV offers the precision engineering and performance you demand from a premium RC motor.

This 500KV variant is specifically optimised for 6S LiPo battery systems, making it ideal for medium to high-speed fixed-wing applications where responsive throttle control and sustained power delivery are essential. The motor features a sophisticated brushless design with dual dynamic balancing, ensuring vibration-free operation that translates directly to smoother flying characteristics and improved aerial stability. RC enthusiasts and professional pilots alike trust the Platinum series for its uncompromising build quality and proven performance in demanding flight conditions.

Built upon years of Hobbywing's expertise in brushless motor technology, the Platinum 4120SL 500KV combines cutting-edge manufacturing techniques with premium materials to deliver a motor that outperforms competing models in its class. The 500KV specification provides the perfect balance between acceleration, top speed and efficiency for fixed-wing aircraft, whilst the compact ?49.5 × 72.3mm form factor ensures seamless integration into most aircraft designs without weight penalties.

Key Features

• Double Dynamic Balancing Technology — The rotor and complete motor assembly undergo two stages of dynamic balancing to ensure smooth, vibration-free operation that eliminates assembly imbalances and delivers the smooth performance critical for precision flying.
• Superior Efficiency Over Competitors — The motor delivers more than 2.5% greater efficiency compared to competing motors of the same specification, meaning longer flight times and cooler running temperatures during extended operations.
• Extended Heat Dissipation Performance — The rotor features a self-cooling structure that dramatically improves thermal management, extending continuous running time by more than 30% compared to competing motors, keeping the motor cooler even under sustained heavy loads.
• Patented Propeller Mount Locking System — An innovatively designed safety feature (patent number 202311210278.7) that prevents propeller slip and eliminates the risk of propeller loss due to loose mounting nuts, ensuring safe, reliable flight operations.
• Diamond-Shaped Anti-Slip Propeller Seat — The propeller mounting seat features a diamond-shaped anti-slip design that prevents propeller spinning and slippage, enhancing safety and reliability during high-performance flying.
• Premium Material Selection — The motor employs top-tier JNEH1200 iron core stator, 200°C high-temperature resistant enamelled wire, and internationally recognised premium bearings to deliver outstanding durability and performance in varied flying conditions.
• Powerful N52SH Arc-Shaped Magnet Design — The rotor utilises N52SH high-strength magnetic materials in an arc-shaped configuration that provides powerful, consistent torque delivery across the entire RPM range.
• Silicone-Sheathed Output Wires — The three-phase motor wires are fitted with custom-made silicone rubber sheaths that protect against abrasion whilst maintaining professional appearance and excellent electrical insulation.
• Multi-Stage Rotor Locking System — The rotor features copper pad, circlip and bushing set screw locking mechanisms that prevent rotor loosening, dramatically improving long-term reliability and structural integrity.
• Flexible Multi-Purpose Design — An optional rear shaft propeller mount can be installed on the motor's rear end, allowing the motor to adapt to diverse aircraft designs and flight configurations.
• Lightweight Titanium Alloy Hardware — Standard titanium alloy nuts and bracket mounting screws minimise overall weight whilst maintaining structural integrity, crucial for aircraft performance.
• Modular Easy-Maintenance Design — The motor adopts a modular construction that facilitates straightforward disassembly for cleaning and maintenance, extending motor lifespan and ensuring consistent peak performance.

Technical Performance

The Hobbywing Platinum 4120SL 500KV motor is engineered for 6S LiPo battery systems, delivering a no-load current of 2.6A at 22.2V (6S nominal voltage). This motor achieves a maximum thrust output of 7.41kg with peak power delivery of 2276W sustained for 42 seconds under controlled test conditions at ambient temperatures below 25°C. The motor's internal resistance of just 17m? reflects the premium copper windings and optimised design that minimises energy losses and heat generation. The stator employs high-standard silicon steel sheet with 180°C temperature-resistant paint coating for durability, whilst the rotor is dynamically balanced to ?10mg tolerance for smooth vibration-free operation. The motor measures ?49.5 × 72.3mm with a stator diameter of ?40.6 × 20mm, and features a ?6mm motor axle shaft with standard 12N14P slot and pole configuration. The 696ZZ bearing specification ensures smooth, reliable rotation throughout the motor's operational life. Propeller mounting uses a ?15mm interface with three M3 mounting points, whilst motor mounting to your aircraft uses four M4 mounting points on a ?30mm pattern. The motor weighs 310g including the 90mm output wire harness, making it lightweight enough for efficient aircraft integration. Recommended ESC options include the Hobbywing Platinum 120A V4 or Platinum 150A V5.1, with recommended propeller sizes being 15×6E, 15×8E, 16×6E, and 16×8E for 6S operations. The 500V AC high voltage isolation test certification confirms electrical safety for demanding applications.

What's in the Box

• Hobbywing Platinum 4120SL 500KV brushless motor
• 90mm silicone-sheathed three-phase output wire harness
• Titanium alloy mounting hardware and fasteners

What You Need to Complete

• 6S LiPo battery pack (11.1V nominal minimum)
• Hobbywing Platinum 120A V4 or 150A V5.1 brushless ESC (electronic speed controller)
• Suitable RC aircraft airframe compatible with ?49.5 × 72.3mm motor diameter
• Propeller sized for 6S operation (15×6E, 15×8E, 16×6E, or 16×8E recommended)
• Battery charger compatible with 6S LiPo chemistry
• Wireless RC receiver and transmitter system

Frequently Asked Questions

• What is the 500KV rating and why does it matter for my RC aircraft? — The 500KV specification indicates the motor's voltage sensitivity — it produces 500 revolutions per volt applied. For a 6S LiPo system (22.2V nominal), this motor will spin at approximately 11,100 RPM unloaded. The 500KV rating is optimised for 6S batteries and provides the ideal balance between speed and torque for medium-performance fixed-wing aircraft, with excellent throttle response characteristics.
• Is the Hobbywing Platinum 4120SL 500KV suitable for beginners? — Whilst the Platinum 4120SL is a premium motor designed primarily for experienced RC pilots and competitive flyers, it is not overly complex to install. However, you will need to pair it with a suitable ESC (electronic speed controller), a compatible aircraft airframe, and a 6S LiPo battery system. Beginners new to fixed-wing flying should ensure they have previous RC experience or access to guidance before attempting a build with this motor.
• What battery does this motor require? — The Platinum 4120SL 500KV is specifically designed for 6S LiPo (lithium polymer) batteries. A 6S LiPo provides 22.2V nominal voltage, which delivers optimal performance and efficiency for this motor. You cannot use 12S batteries with this motor as the voltage would be too high. Standard capacity 6S batteries ranging from 2000mAh to 10000mAh will work, with larger capacity packs providing extended flight duration.
• How does the Platinum 4120SL compare to other fixed-wing motors? — The Platinum 4120SL series advantages include double dynamic balancing for vibration-free operation, exceptional heat dissipation extending run times by 30%, and 2.5% superior efficiency compared to competitor motors. The patented propeller locking system prevents propeller loss, a critical safety feature. The combination of premium JNEH1200 iron core, N52SH arc magnets, and multiple rotor locking mechanisms delivers unmatched reliability and performance in its class.
• What ESC should I pair with this motor? — Hobbywing recommends either the Platinum 120A V4 or Platinum 150A V5.1 brushless ESC. The 120A option suits standard flying applications, whilst the 150A provides higher current capacity for peak performance. Both ESCs are specifically calibrated to work optimally with Platinum series motors.
• Can I use this motor with propellers other than the recommended sizes? — Hobbywing specifies 15×6E, 15×8E, 16×6E, and 16×8E propellers for optimal 6S operation. Using significantly larger propellers may exceed the maximum safe current rating of 102.7A at 42 seconds, whilst smaller propellers may not utilise the motor's full performance capability. Always verify propeller specifications and thrust calculations before flying.
• What makes the propeller mounting system safe? — The patented propeller locking system features a diamond-shaped anti-slip design that prevents the propeller from slipping or free-spinning on the shaft, even if the mounting nut loosens slightly. This dual-redundancy safety approach (mechanical anti-slip plus locking nut design) ensures your propeller remains secure throughout flight operations.
• Is this motor waterproof for wet weather flying? — The motor passes a 500V AC high voltage isolation test confirming electrical safety, but the motor is not fully sealed or waterproof. Brief exposure to light rain during flight is acceptable, but the motor should not be submerged or exposed to sustained water contact. Always allow drying time before storage if wet.

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 HOBBYWING PLATINUM 4120SL 500KV FIXED WING MOTOR HW30416001 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.