Overview
The E-flite® Eratix 3D FF (Flat Foamy) 860mm BNF Basic with AS3X and SAFE represents a significant breakthrough in ready-to-fly RC aircraft design. This innovative flat foamy model brings together the aggressive aerobatic capabilities and smooth sport-flying performance of traditional scratch-built flat foam models, without requiring the time-consuming assembly, gluing, and technical expertise that have historically made them challenging for most pilots. Whether you're searching for a brushless RC plane UK retailers stock, or looking for the easiest-to-assemble aerobatic aircraft available, the Eratix 3D FF delivers exceptional value and performance that appeals to a broad spectrum of pilots, from those completely new to flat foamy flying to experienced builders who simply want to get airborne without the build-time commitment.
In the early 2000s, flat foamy models were extremely popular because they could be scratch-built from foam sheets available in most shops. Today, most foam models are fully-moulded sport and scale aircraft, with few matching the unique capabilities and raw performance of flat foam models specifically designed for aerobatic and 3D flying. The Eratix 3D FF is perfect for experienced pilots who already build and fly flat foam models, intermediate pilots interested in flat foamies but unwilling to undertake a complicated scratch build, and less experienced pilots who have always wanted to explore this flying style but were intimidated by the extra effort and skills required to source components, construct, and fly such a model. This aircraft arrives factory-assembled with all power and control systems installed, ready for quick final assembly in less than one hour, making it the easiest-to-buy, easiest-to-assemble, and best-value flat foamy model available in the UK market today.
The Eratix 3D FF's versatility is genuinely impressive. Its lightweight yet incredibly durable high-density EPP airframe means you can fly it indoors in gymnasiums and other covered spaces, or outdoors in yards, parks, sports fields, and beyond. This makes it an exceptionally versatile addition to any pilot's hangar, whether you're looking for an aerobatic machine for weekend fun or a capable trainer aircraft for developing 3D flying skills. The flat foamy's truly "mild to wild" flight envelope means the same aircraft can deliver slow, stable cruising flight one moment and transition seamlessly into aggressive 3D manoeuvres the next—all in a single flight session.
Key Features
- Flat Foamy Design with 3D and Aerobatic Capability — Unlike conventional foam models, this aircraft delivers the unique combination of slow-cruise stability, smooth sport flying, basic aerobatics, and all-out aggressive 3D performance in one platform. This "mild to wild" versatility means you're not limited to a single flying style—you can explore your entire skill range in a single flight session.
- Factory-Installed Power System and Controls — The Eratix 3D FF arrives with a specially-tuned brushless motor, Spektrum Avian 15A Smart ESC, AR630 receiver, and three digital servos already installed and configured. This eliminates the need to source components separately, programme controllers, or perform complex assembly steps that typically delay first flights for weeks.
- Spektrum Avian™ 15A Smart ESC with Real-Time Telemetry — This intelligent electronic speed controller streams vital power system data—including motor RPM, battery current, voltage, and more—directly to your transmitter via compatible receivers. This real-time telemetry helps you manage battery packs more precisely, monitor system health in-flight, and extend the lifespan of your power system through better charge cycle management.
- AS3X™ Stabilisation Technology — E-flite's exclusive AS3X technology works behind the scenes continuously throughout your flight to smooth out the destabilising effects of wind turbulence and gusts. This stabilisation delivers the locked-in, responsive feel of flying a much larger aircraft, dramatically improving control precision and reducing pilot workload in gusty or turbulent conditions.
- SAFE® Select Flight Envelope Protection — The optional-use SAFE Select system adds pitch and bank angle limits plus automatic self-levelling capability that you can toggle on or off with a switch during flight. This innovative feature supports confidence building by preventing inadvertent stalls or extreme attitudes, making the Eratix 3D FF genuinely easier to fly than comparable flat foamy models.
- Spektrum AR630 Receiver with DSMX® Technology — The included receiver delivers industry-leading 2.4GHz DSMX technology with full-range fly-by range telemetry, interference-free performance, and compatibility with all modern Spektrum transmitters. This receiver ensures reliable control authority in the busiest RF environments and supports advanced features like Smart telemetry integration and trainer mode functionality.
- Specially Tuned 2405-1200KV Brushless Motor — E-flite engineers have specifically optimised this outrunner motor for the popular 3S 600–850mAh LiPo battery range, delivering optimal power delivery across the flight envelope. The 1200KV rating provides plenty of thrust for unlimited vertical manoeuvres and aggressive 3D performance whilst maintaining efficiency for longer flights.
- 9×4.6 Electric Slow-Fly Propeller — This specially-selected prop works perfectly with the tuned power system to deliver strong thrust across the entire flight envelope whilst maintaining stability during low-speed passes and slow cruising. The slow-fly design maximises control authority at low airspeeds where 3D manoeuvres are performed.
- High-Density EPP Airframe with Carbon and Composite Reinforcement — The airframe combines lightweight high-density expanded polypropylene with strategic carbon fibre and composite reinforcements, delivering exceptional stiffness and strength without adding unnecessary weight. This construction approach yields a durable airframe that can withstand the demands of aerobatic and 3D flying whilst maintaining the low weight necessary for slow-speed performance and indoor flight capability.
- Three Factory-Installed Digital Servos Including Metal-Geared Aileron Servo — The included Spektrum sub-micro digital servos provide fast, precise control response with the reliability expected from factory-installed systems. The metal-geared aileron servo delivers the durability required for aggressive 3D aileron rolls and knife-edge manoeuvres without stripping gears or losing authority under load.
- Fast, Glue-Free Assembly — Unlike traditional flat foamy models requiring hours of building time with foam-safe glues, sandpaper, and careful surface preparation, the Eratix 3D FF bolts and snaps together in less than one hour using only basic tools. The snap-in landing gear system allows tool-free installation and removal for easy replacement or storage, dramatically reducing total assembly time compared to conventional flat foam aircraft.
- High-Contrast, High-Visibility Trim Scheme — The factory finish delivers excellent orientation and visibility during flight, making it easy to track aircraft orientation in all lighting conditions and complex flight attitudes. This finish also arrives factory-applied, eliminating time-consuming paint and finishing work required on traditional scratch-built models.
- Bind-N-Fly® Basic Completion Level — The BNF Basic specification means the aircraft arrives with receiver already installed and configured. If you already own a compatible Spektrum DSMX or DSM2 transmitter, you simply bind the receiver, finish assembly, and fly—typically within an afternoon of unboxing.
- Compatible with Popular Spektrum DXS Transmitters — The Eratix 3D FF works perfectly with Spektrum DXS transmitters used with many of the most popular E-flite and HobbyZone trainer aircraft, making it an ideal progression aircraft if you already own trainer equipment or plan to build a coordinated fleet of compatible models.
Technical Performance
The Eratix 3D FF represents impressive engineering that delivers genuine flat foamy performance in a ready-to-fly package. The airframe measures 864mm in wingspan and 907mm in length, providing ample wing surface area for slow-speed stability and controlled flight authority whilst remaining small enough for gymnasium flying and outdoor park use. At 376 grams (13.3 ounces), the aircraft is genuinely lightweight, contributing to the low wing loading that enables slow cruise speeds and the ability to perform low-speed 3D manoeuvres with positive control authority even during slow knife-edge passes and inverted flight. Construction utilises high-density EPP foam reinforced with carbon fibre and composite materials, balancing durability against foam-only designs whilst maintaining the low weight essential for performance.
The power system delivers impressive performance across the entire flight envelope. The 2405-1200KV brushless motor, when paired with the 9×4.6 slow-fly propeller, provides strong, responsive thrust suitable for unlimited vertical manoeuvres, aggressive 3D flying, and sustained climbs. The motor has been specifically tuned for the 3S 600–850mAh LiPo battery range that dominates the micro-scale RC aircraft market, ensuring optimal efficiency and performance regardless of whether you choose lighter 600mAh packs for minimum weight or more capacious 850mAh batteries for extended flight times. The Spektrum Avian 15A Smart ESC provides sufficient current capacity for the motor's demands whilst remaining compact enough to minimise weight and CG impact. Real-time telemetry from the Smart ESC streams continuously to compatible transmitters, providing visibility into motor RPM, battery voltage, and current draw throughout flight—enabling data-driven decisions about battery pack selection and flight management.
Control authority comes from three factory-installed Spektrum sub-micro digital servos, including a metal-geared aileron servo capable of withstanding the load demands of aggressive 3D aileron rolls and sustained aerobatic manoeuvres. The digital servos deliver fast response times and precise control positioning essential for accurate aerobatic flying and the crisp control feel required for smooth sport flying. The AR630 receiver integrates full DSMX technology with telemetry capability, supporting advanced features like Smart ESC data integration and providing the interference-free performance expected from 2.4GHz spread-spectrum systems. AS3X stabilisation works continuously throughout flight to eliminate wind and turbulence effects, whilst optional SAFE Select provides pitch and bank angle limits plus automatic self-levelling when enabled, making this aircraft genuinely progressive—capable of supporting pilots from those exploring their first 3D flights through experienced pilots seeking a convenient, high-performance flat foamy option.
What's in the Box
- E-flite® Eratix 3D FF 860mm airframe (partially assembled, carbon/composite reinforced EPP construction)
- Spektrum™ Avian™ 15A Brushless Smart ESC (installed in fuselage)
- Spektrum™ Avian™ Brushless Outrunner Motor, 2405-1200KV (installed and balanced)
- Three Spektrum Sub-Micro Digital Servos (installed with linkages, including metal-geared aileron servo)
- Spektrum AR630 Receiver with DSMX technology and telemetry (installed and configured)
- 9×4.6 Electric Slow-Fly Propeller
- Product Manual with assembly instructions, flight recommendations, and troubleshooting guidance
What You Need to Complete
- Full-range 5+ channel Spektrum™ DSMX®/DSM2® compatible transmitter (transmitter must support at least 4 channels; many popular Spektrum models including the DXS, DX6e, DX8e, and higher models are suitable)
- 3S 11.1V 600–850mAh LiPo battery with IC2 Connector (600mAh recommended for minimum weight, 850mAh for extended flight time; alternatively, JST-RCY connector batteries with IC2-to-JST-RCY adapter)
- Compatible LiPo battery charger (must support 3S lithium polymer charging)
Frequently Asked Questions
- Is the E-flite Eratix 3D FF suitable for beginners or intermediate pilots? — Yes, the Eratix 3D FF is specifically designed to appeal to intermediate to advanced pilots who want flat foamy capability without the build commitment, and to less experienced pilots interested in 3D flying. The aircraft is not intended as a primary trainer for absolute beginners with zero RC experience—it requires at least basic RC flying skills and understanding of 3D aerobatic techniques. However, the factory-installed AS3X stabilisation and optional SAFE Select flight envelope protection make this aircraft considerably more forgiving than traditional flat foamies, supporting confidence building as you develop your 3D flying skills. If you're completely new to RC flight, we recommend starting with a dedicated trainer aircraft before progressing to the Eratix 3D FF.
- What battery does the Eratix 3D FF need, and how long will it fly? — The aircraft is compatible with 3S 11.1V LiPo batteries in the 600–850mAh range with IC2 connectors. We recommend the 850mAh capacity for extended flight times and more consistent power delivery as the battery discharges; 600mAh batteries will minimise aircraft weight but result in shorter flight duration. Typical flight times range from 8–12 minutes depending on flying style (aggressive 3D flying consumes more energy than smooth sport flying), battery capacity, and weight configuration. Always use a quality smart charger and check battery voltage before every flight.
- What is the difference between the Eratix 3D FF flat foamy and other E-flite foam aircraft? — The Eratix 3D FF is a purpose-built flat foamy model, meaning it features the characteristic flat-sided fuselage and wing design of traditional flat foam aircraft, combined with a modern, factory-assembled package. Unlike conventional fully-moulded sport foam models, the Eratix delivers genuine 3D aerobatic capability—including unlimited vertical, knife-edge flight, and sustained inverted flight—whilst maintaining excellent slow-speed stability and smooth sport flying characteristics. The flat foamy airframe design enables this unique performance combination in a way that more conventional rounded fuselages cannot achieve. Other E-flite foam models typically emphasise sport flying or trainer characteristics rather than the aggressive aerobatic capability central to the Eratix's design philosophy.
- Can I fly the Eratix 3D FF indoors, and is it suitable for gymnasium flying? — Yes, the Eratix 3D FF is absolutely suitable for gymnasium flying. At 376 grams with a wingspan of 864mm, it's light and manoeuvrable enough for indoor flight in large gymnasiums, sports halls, and other covered spaces. The low wing loading enables slow, controlled flight at the reduced airspeeds required for safe indoor operation. However, be aware that aggressive 3D flying requires considerable vertical airspace—we recommend at least a 40-foot ceiling height for comfortable 3D manoeuvres. For pure sport flying or smooth cruising, lower ceiling heights are acceptable. Always observe local regulations regarding indoor RC flying and obtain appropriate permissions from gymnasium or venue operators.
- Is the Eratix 3D FF waterproof or suitable for wet conditions? — The EPP airframe itself is moisture-resistant, but the aircraft is not waterproof. The electronics (ESC, motor, receiver, servos) are not sealed and will be damaged by water immersion. We recommend avoiding deliberate water landings or flying in heavy rain. Light drizzle during careful outdoor flying should not cause problems, but intentional water contact must be avoided. If the aircraft does get wet, allow all components to dry completely before operating again.
- What transmitter do I need, and am I limited to Spektrum? — The Eratix 3D FF includes an AR630 receiver that is compatible with full-range Spektrum DSMX and DSM2 transmitters. Any Spektrum transmitter supporting 5+ channels will work; popular options include the Spektrum DXS, DX6e, DX8e, and higher-end models. The DXS is particularly recommended because it's used with many E-flite and HobbyZone trainer aircraft, potentially allowing you to share a transmitter across multiple models. You must use a Spektrum-brand transmitter; the receiver is not compatible with other brands.
- How long does assembly take, and what tools do I need? — Assembly typically takes less than one hour because the aircraft arrives factory-assembled with all power and control systems installed. You'll need only basic RC model tools: a small Phillips screwdriver, possibly a 1.5mm hex wrench, and access to a safe, clean work surface. No foam-cutting tools, sandpaper, glue, or specialised equipment is required. Detailed assembly instructions are provided in the product manual.
- Can I replace damaged parts, and are spare components available? — Yes, a comprehensive range of replacement and spare parts is available for the Eratix 3D FF, including wing sets, fuselage components, propeller adapters, servo arms, screws, and more. In the unlikely event you damage any airframe part beyond repair, you can source genuine E-flite replacement components through RC Model Shop or other authorised retailers. Motor, ESC, and servo components can also be sourced separately if replacement is needed.
- Does the Eratix 3D FF include everything I need to fly? — The aircraft is supplied with all essential power, control, and structural components installed and ready. However, you will need to source a compatible Spektrum transmitter, a 3S LiPo battery with IC2 connector, and a suitable LiPo charger separately. These are sold as separate items and are not included in the package. Once you have these three items, you'll be ready to charge, bind, and fly.
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 E-flite Eratix 3D FF (Flat Foamy) 860mm BNF Basic with AS3X and SAFE 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.
