RDNA0402

Overview

The Radient RS-HV201-MG Standard Analog HV MG Servo is a premium metal gear servo designed to deliver exceptional torque, speed and reliability for a wide range of RC applications. Whether you're building a custom RC car, truck, boat or aircraft, this high-voltage servo offers the performance and durability that serious RC enthusiasts demand. With 10kg of torque at maximum voltage and responsive 0.10-second speed capability, this is an ideal choice for RC hobbyists in the UK looking for a professional-grade servo that won't break the bank.

Built by Radient, a brand rapidly gaining recognition for delivering outstanding value without compromising on quality, this servo is engineered with metal gears and a dual ball-raced output shaft that ensure smooth, precise control in demanding conditions. The water-resistant case with O-ring seals protects the internal components from moisture and dust, making it suitable for outdoor use and occasional exposure to wet weather. Whether you're flying RC drones, piloting RC helicopters, driving RC cars and trucks, or racing RC boats, the RS-HV201-MG provides the control authority you need to perform at your best.

This standard-size servo is compact enough to fit into tight spaces yet powerful enough to handle control surfaces and steering linkages on vehicles ranging from lightweight RC aircraft to heavier RC buggies and crawlers. The 25-tooth spline output ensures broad compatibility with aftermarket servo horns, giving you flexibility in how you mount and configure the servo for your specific application.

Key Features

• Metal Gears — Constructed with durable metal gearing rather than plastic, the servo's internal gear train resists wear and maintains precise control even after thousands of hours of use, ensuring your RC setup remains reliable and responsive over the long term.
• Dual Ball-Raced Output Shaft — A pair of precision ball bearings support the output shaft, reducing friction and enabling smooth, backlash-free servo movement that translates to better handling and more accurate control of your RC model.
• High-Voltage Operation (6.0V–7.4V) — The servo is optimised to run on high-voltage battery packs, allowing you to achieve maximum torque and speed performance compared to standard 4.8V servos, making it ideal for high-performance RC applications.
• 3P Iron Core Motor — A three-pole iron core motor provides consistent power delivery and smooth torque characteristics across the entire range of motion, enabling precise steering and control movements without jitter or hesitation.
• O-Ring Seals and Water Resistance — Multiple O-ring seals protect the servo case and internal mechanisms from moisture ingress, water spray and humidity, extending the lifespan of the servo even when used in wet conditions or muddy environments common in RC off-roading.
• 25-Tooth Spline Output — The standard 25-tooth spline ensures compatibility with a wide range of aftermarket servo horns and control linkages, allowing you to customise your setup and easily replace worn components.
• Standard-Size Form Factor — At just 40.8 x 20.1 x 38mm and weighing only 56g, this servo fits into standard servo bays found on most RC cars, trucks, boats, aircraft, drones and helicopters, making it a drop-in replacement for comparable servos.
• Analog Control System — The servo uses traditional analogue electronics rather than digital processing, providing smooth, responsive control with minimal lag and excellent performance in radio systems ranging from budget to mid-range transmitters.

Technical Performance

The Radient RS-HV201-MG delivers impressive performance across both voltage ranges supported by modern RC battery packs. At 6.0V, the servo produces 9.0 kg.cm of torque and achieves a speed of 0.12 seconds per 60 degrees of rotation—more than adequate for most recreational RC applications including RC cars, RC trucks and smaller RC helicopters. Stepping up to 7.4V (a single 2S LiPo battery), performance increases noticeably with torque climbing to 10.0 kg.cm (equivalent to 138.87 ounces-inch, a measurement commonly used in North American RC specifications) and speed improving to an impressive 0.10 seconds per 60 degrees. This makes the servo an excellent choice for UK RC enthusiasts looking to upgrade their control systems without investing in top-tier professional-grade equipment. The metal gear construction ensures durability and maintains precision through repeated cycling, whilst the dual ball-raced output shaft minimises friction and backlash. The 3P iron core motor delivers consistent torque throughout the servo's operating range, ensuring your RC model responds predictably whether you're making fine adjustments for precision manoeuvres or demanding rapid directional changes during fast-paced driving or flying sessions. The compact 56-gram weight makes it suitable for lightweight RC models where servo mass affects overall performance and flight characteristics.

What's in the Box

• Radient RS-HV201-MG servo unit
• Mounting hardware (servo bracket components and fasteners)
• Multiple servo horns (25-tooth spline compatible)

Frequently Asked Questions

• What voltage battery should I use with the RS-HV201-MG servo? — The servo is designed to operate between 6.0V and 7.4V, meaning it works perfectly with a single 2S LiPo battery (nominal 7.4V fully charged) or a 6-cell NiMH battery pack at 6.0V nominal. Many RC car and truck batteries fall within this range, making it highly compatible with existing RC setups across the UK.
• Is this servo water-resistant for RC boats and outdoor use? — Yes, the servo features O-ring seals and a water-resistant case design that protects internal components from moisture, making it suitable for RC boat applications, outdoor RC cars in wet conditions, and RC aircraft that may encounter spray or humidity.
• What makes this servo better than cheaper alternatives? — The metal gear construction, dual ball-raced output shaft and water-resistant sealing represent significant engineering advantages over budget plastic-geared servos. These features deliver longer lifespan, more consistent control precision and better reliability—ultimately saving money by reducing failures and the need for frequent replacement.
• Can I use this servo in my RC car, truck or crawler? — Absolutely. The standard-size form factor and high torque output make it excellent for RC car steering servos, RC truck throttle and brake control, and RC crawler steering linkages. Many UK RC hobbyists use this servo for both steering and additional control functions.
• How fast does the servo respond? — At 7.4V, the servo completes a 60-degree rotation in just 0.10 seconds, making it one of the faster analogue servos on the market. This rapid response is crucial for maintaining control precision in high-speed RC applications and enabling quick directional changes.
• Is the servo compatible with my transmitter and receiver? — The RS-HV201-MG is a standard analogue servo that works with virtually any RC transmitter and receiver combination, whether you're using budget 2-channel systems or advanced multi-channel radio gear. Simply connect the three servo wires (signal, power, ground) and it operates immediately.
• What is the servo weight and will it affect my RC model? — At just 56 grams, the servo is lightweight enough for most RC applications. For very lightweight aircraft or drones, this is a minimal impact, whilst for RC cars and trucks, the weight is negligible compared to total vehicle mass.

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 Radient RS-HV201-MG Standard Analog HV MG Servo 10kg 0.1s 6.0 - 7.4V RDNA0402 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.