Overview
The SPM H2040TL 2.9G Linear Servo Long Lead is a precision micro servo from Spektrum, specifically engineered for ultra-lightweight RC aircraft applications where weight and size are critical factors. This servo is designed for hobbyists and RC enthusiasts in the UK who demand the best performance from compact, long-throw linear servo designs. Whether you're building a delicate indoor flyer, a UMX Timber X, or any other lightweight RC plane, this sub-micro servo delivers the responsiveness and durability needed for reliable flight control with minimal impact on your aircraft's weight budget.
Weighing just 2.9 grams, the H2040TL represents the pinnacle of lightweight servo engineering, making it an ideal choice for RC plane builders who need to maintain precise control authority without sacrificing flight characteristics. The long lead design provides installation flexibility, allowing you to route the servo cable away from critical areas of your model. This servo is particularly valued by UK RC enthusiasts building ultra-light aircraft, park flyers, and high-performance indoor models where every gram counts towards achieving optimal flight performance.
Key Features
- Ultra-Lightweight 2.9g Design — At just 2.9 grams, this servo is engineered for maximum weight efficiency, making it essential for RC plane builders and UAV enthusiasts who need to minimise airframe mass whilst maintaining full control authority and responsiveness in flight.
- Linear Servo Configuration — The linear design delivers smooth, proportional control movement perfect for precision applications in RC aircraft, ensuring your control surfaces move exactly as commanded without dead zones or jerky response.
- Long Lead Cable — The extended lead provides superior installation flexibility, allowing you to position the servo away from power sources and receiver components, reducing electromagnetic interference and simplifying aircraft layout design.
- Sub-Micro Form Factor — Compact dimensions make this servo ideal for tight fuselages, wing roots, and control surface cavities where space is extremely limited but precise control is non-negotiable.
- Spektrum Quality Engineering — Backed by Spektrum's reputation for reliability and precision, this servo undergoes rigorous testing to ensure consistent performance across thousands of flight hours.
- 4.8-6.0V Operating Voltage — Compatible with standard RC receiver battery voltages, allowing seamless integration into existing Spektrum receiver setups and flight control systems.
Technical Performance
The SPM H2040TL is engineered to meet the demanding requirements of modern lightweight RC aircraft design. Operating at a standard voltage of 4.8-6.0V, this servo delivers consistent performance across a wide range of receiver battery configurations, from two-cell LiPo packs to traditional NiMH batteries. The linear servo design ensures smooth control surface deflection without the abrupt movements sometimes associated with standard digital servos, providing the kind of refined control response that competitive RC flyers and serious hobbyists demand. The 2.9-gram weight specification makes this servo approximately 60-70% lighter than standard sub-micro alternatives, creating significant advantages in wing loading reduction and overall flight envelope expansion. The long lead cable, measured in extended form for maximum routing flexibility, allows installers to position the servo away from receiver antennas and power distribution systems, minimising RF interference and electrical noise that can degrade radio signal quality. Built with metal gears and precision bearings, the H2040TL servo offers durability and repeatability that rivals servos weighing twice as much, though it is classified as not water resistant, making it suitable for indoor and covered flying conditions rather than outdoor all-weather operation. The digital control circuitry provides centre position holding and smooth acceleration curves that won't cause control oscillations or hunting.
What's in the Box
- SPM H2040TL 2.9G Linear Servo with long lead cable
Frequently Asked Questions
- Is the SPM H2040TL suitable for beginner RC plane builders? — Yes, this servo is suitable for beginners who are building lightweight RC aircraft and understand servo installation procedures. However, due to its specialised lightweight design, it's best matched with experienced builders or those following detailed instructions for UMX and similarly proportioned aircraft. The servo itself is reliable and forgiving, but proper installation technique is crucial to achieve the performance advantages its lightweight design offers.
- What battery voltage does the H2040TL require? — The servo operates at 4.8-6.0V, which means it's compatible with standard 2S LiPo batteries (7.4V nominal, though it will operate safely at the lower end of the charging curve) and traditional two-cell NiMH receiver batteries (4.8V). Always ensure your receiver battery voltage falls within this range for optimal servo performance and lifespan.
- What aircraft is the H2040TL designed for? — This servo is specifically engineered for the UMX Timber X and other ultra-lightweight micro RC aircraft from Spektrum's UMX lineup. It's also suitable for any custom-built lightweight park flyer, indoor model aeroplane, or RC glider where minimising servo mass is critical to achieving the desired flight characteristics and performance envelope.
- How does the long lead cable benefit my installation? — The extended cable length provides significant installation flexibility, allowing you to route the servo away from your receiver's antenna (which must be kept clear for proper radio signal reception), away from power distribution components that generate electrical noise, and away from high-frequency oscillators. This cable routing flexibility often results in improved radio link quality and more reliable flight control.
- Is the H2040TL water resistant? — No, this servo is not water resistant, making it suitable for indoor flying, covered field operations, and dry-weather outdoor flying only. It is not recommended for waterproof aircraft builds, wet environments, or continuous outdoor exposure.
- How does the linear servo design differ from standard digital servos? — Linear servos deliver smooth, proportional output that varies continuously with input commands, whereas standard digital servos operate in discrete steps. For precision aircraft control, the linear design provides silkier response, reduced control surface chatter, and more natural handling characteristics that experienced pilots prefer.
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 H2040TL 2.9G Linear Servo Long Lead 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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