Product Details
Scaled down from the popular E-flite® Eratix 3D FF 860mm, the UMX™ (Ultra Micro eXtreme) Eratix 3D FF 450mm offers "flat foamy" capabilities and performance in more places and smaller spaces! It arrives 100% factory assembled and ready to fly right out of the box, including a powerful 2S compatible brushless power system.
Key Features
- A scaled-down, ultra-micro version of the popular Eratix 3D FF (Flat Foamy) 860mm you can fly in more places and smaller spaces
- Powerful 2S compatible brushless outrunner motor with prop saver
- Spektrum™ receiver with fly-by range telemetry and industry-leading 2.4GHz DSMX® technology
- Easier to fly with innovative and optional-use SAFE® Select flight envelope protection
- Completely factory-assembled and ready to fly right out of the box
In The Box
- (1) E-flite® UMX™ Eratix 3D FF 450mm with:
- (1) Spektrum Linear Servos (installed)
- (1) Spektrum Brushless Outrunner Motor (installed)
- (1) Spektrum Control Unit with (1) Receiver and (1) Brushless ESC (installed)
- (1) Product Manual
Needed to Complete
- Full-range 5+ channel Spektrum DSMX/DSM2 compatible transmitter
- 2S 7.4V 280-350mAh LiPo with 3-pin JST-PH Connector
- Compatible LiPo charger (plus a suitable adapter/charge lead, including SPMXCA326, sold separately)
E-flite UMX Eratix 3D FF (Flat Foamy) 450mm RC Airplane Introduction
The E-flite® Eratix 3D FF (Flat Foamy) 860mm took the market by storm by being the most convenient, easiest to assemble, and fly "flat foamy" model in its class. Now the UMX™ Eratix 3D FF 450mm offers those same benefits in a scaled-down, ultra-micro size so you can fly in more places and smaller spaces – including indoors! It arrives fully factory assembled and ready to fly right out of the box, including a 2S-compatible brushless outrunner motor with a prop saver, four servos, and a Spektrum receiver featuring AS3X® and SAFE® Select technologies.
E-flite UMX Eratix 3D FF (Flat Foamy) 450mm RC Airplane Overview
The E-flite® Eratix 3D FF (Flat Foamy) 450mm offers the aggressive aerobatic plus smooth sport and slow-flying performance of flat foam models – without all the hassles of buying components for and building one! It arrives fully factory assembled and ready to bind to your compatible Spektrum transmitter, allowing you to fly in almost no time. Inspired by the UMX™ Extra 300 and Yak 54 flat foamy models, its laser-cut and composite reinforced airframe makes it light enough to fly extreme 3D manoeuvres indoors in spaces no larger than a living or conference room, or almost anywhere outdoors. The factory-installed brushless outrunner motor with a prop saver is compatible with popular 2S 280–350mAh batteries. It's also equipped with expertly tuned AS3X® and SAFE® Select technologies, plus it provides real-time battery voltage and other telemetry information to compatible transmitters. This makes it a versatile addition to the hangar for a wide variety of intermediate to experienced pilots!
E-flite UMX Eratix 3D FF (Flat Foamy) 450mm RC Airplane Features
- Real-time battery voltage and other telemetry data with compatible transmitters
- The unmatched stability and locked-in feel of exclusive AS3X® technology
- Laser-cut flat foam airframe with composite reinforcement
- Oversized control surfaces for full 3D aerobatic capability
- 4 factory-installed servos and linkages
- No FAA registration or Remote ID required (under the 250-gram weight limit)
- Brand: E-flite
- Model Number: EFLU02050
- Product Type: Ultra-Micro 3D Flat Foamy RC Aircraft
- Assembly Level: Bind-N-Fly Basic (BNF Basic)
- Skill Level: Level 2 - Some experience recommended
- Wingspan: 450mm
- Length: 487mm
- Weight: 62.5g (under 250g threshold)
- Airframe Material: Laser-cut composite-reinforced foam
- Power System: 2S compatible brushless outrunner motor
- Motor Type: Spektrum brushless outrunner
- Propeller: 160 x 35mm with prop saver
- Battery Compatibility: 2S 7.4V LiPo (280–350mAh recommended)
- Battery Connector: 3-pin JST-PH
- Electronic Speed Controller: Brushless ESC (integrated with receiver)
- Flight Controller: Spektrum control unit with integrated ESC and receiver
- Receiver: Spektrum 5-channel receiver with integrated flight controller and ESC
- Radio System: 2.4GHz Spektrum DSMX/DSM2
- Radio Compatibility: Full-range 5+ channel Spektrum DSMX/DSM2 compatible transmitter required
- Channels: 5+ channel compatible transmitters
- Flight Technologies: AS3X (Artificial Stabilisation 3-aXis) and SAFE Select
- SAFE Select: Optional-use flight envelope protection with pitch/bank angle limits and auto self-levelling
- Telemetry: Real-time flight battery voltage telemetry to compatible Spektrum AirWare transmitters
- Compatible Transmitters for Telemetry: DX6e, DX8e, DX6 G2/G3, DX8 G2, DX9, NX6–20, iX12–20 and similar
- Servos: 4x Spektrum linear servos (factory-installed)
- Servo Type: Linear
- Control Surfaces: Oversized control surfaces for full 3D aerobatic capability
- Flight Performance: Smooth cruising, sport flying, basic aerobatics, and aggressive 3D manoeuvres
- Flying Styles: Sport, Ultra Micro
- Regulatory Status: Under 250g - no FAA registration or Remote ID required in UK
- Durability Features: Easily repairable with foam-safe CA, foam-to-foam adhesive, epoxy
- Factory Assembly: 100% factory assembled and ready to fly (BNF)
- Included Items: Aircraft with all components installed, product manual
- Required to Complete: Spektrum DSMX/DSM2 compatible transmitter, 2S 7.4V 280–350mAh LiPo battery with JST-PH connector, compatible LiPo charger with adapter/charge lead if required
Overview
The E-flite UMX Eratix 3D FF 450mm BNF Basic with AS3X and SAFE Select represents a revolutionary approach to ultra-micro RC aircraft that delivers genuine 3D aerobatic performance in a package small enough to fly indoors. Scaled down from the wildly successful E-flite Eratix 3D FF 860mm, this ultra-micro flat foamy aircraft brings professional-grade capabilities to RC enthusiasts who want to fly in spaces most other models cannot access — your living room, garage, gymnasium, or small garden. At just 62.5 grams, this ready-to-fly RC aircraft remains well under the 250-gram threshold, meaning no FAA registration or Remote ID is required in the UK, making it genuinely hassle-free to own and operate.
What sets the UMX Eratix 3D FF 450mm apart from other RC aircraft in its class is the complete factory assembly and extensive onboard technology. Unlike traditional flat foamy models that demand component purchasing, soldering, and meticulous assembly, this brushless RC plane arrives 100 percent factory-assembled with every component installed and calibrated. The powerful 2S-compatible brushless outrunner motor, four Spektrum linear servos, flight controller with integrated ESC and receiver, and all control linkages are ready to fly straight from the box. All you need is a compatible Spektrum transmitter, a 2S LiPo battery, and a charger — then you can be airborne in minutes. This makes it an ideal choice for intermediate to experienced RC pilots who want to expand their flying capabilities without the traditional build time associated with flat foamy models.
Whether you're a seasoned RC aircraft pilot seeking a new challenge, an indoor flyer looking to experience aggressive 3D manoeuvres in confined spaces, or an enthusiast who wants the versatility to switch between slow-speed cruising and unlimited vertical performance, the UMX Eratix 3D FF 450mm delivers. The laser-cut and composite-reinforced foam airframe is durable yet lightweight, the exclusive AS3X technology smooths out wind and turbulence effects for a locked-in feel, and the optional SAFE Select flight envelope protection can help you learn complex 3D manoeuvres with greater confidence. This is a genuine, ready-to-fly RC aeroplane that performs like a much larger aircraft.
Key Features
- Ultra-Micro 450mm Flat Foamy Design — At just 450mm wingspan and 62.5 grams total weight, this aircraft is small enough to fly indoors in living rooms, conference rooms, and gymnasiums, yet large enough to deliver full 3D aerobatic capability with excellent stability and control authority, making it unique among ultra-micro RC aircraft.
- 100 Percent Factory Assembled and Ready to Fly — Unlike traditional flat foamy models requiring extensive assembly, the UMX Eratix 3D FF 450mm arrives completely built, tested and calibrated from the factory with all four servos installed, motor mounted, and control linkages rigged, allowing you to bind your transmitter and fly within minutes.
- Powerful 2S-Compatible Brushless Outrunner Motor with Prop Saver — The specially tuned brushless motor delivers plenty of thrust for unlimited vertical and 3D performance with standard 2S 280–350mAh LiPo batteries, whilst the integrated prop saver protects the propeller during hard landings and crashes, reducing replacement costs and downtime.
- Spektrum 2.4GHz DSMX Technology with Fly-by-Range Telemetry — The aircraft features industry-leading Spektrum 2.4GHz DSMX receiver technology that binds instantly to compatible 5+ channel transmitters and provides real-time flight battery voltage telemetry to AirWare-equipped transmitters including the DX6e, DX8e, DX6 G2/G3, DX8 G2, DX9, NX6–20, iX12–20 and others, allowing you to monitor battery status whilst flying.
- Exclusive AS3X Stability Technology — The unmatched stability and locked-in feel of E-flite's proprietary AS3X (Artificial Stabilisation 3-aXis) technology works continuously in the background to counteract the effects of wind and turbulence, delivering smooth, predictable flight characteristics that make the aircraft feel significantly larger and more stable than its ultra-micro size suggests.
- Optional SAFE Select Flight Envelope Protection — Innovative SAFE Select technology offers pitch and bank angle limits along with automatic self-levelling that can be toggled on and off at the flip of a switch, providing learner-friendly protection that can be disabled once you master more aggressive manoeuvres, making it easier to progress through the learning curve.
- Oversized Control Surfaces for Full 3D Aerobatic Capability — The aircraft features proportionally oversized control surfaces that provide the authority necessary for full inverted flight, knife-edge manoeuvres, tumbles, spins and other extreme aerobatic moves, giving you the same performance envelope as much larger flat foamy models.
- Laser-Cut Composite-Reinforced Foam Airframe — The durable yet lightweight construction combines foam aircraft construction with strategic composite reinforcement to deliver a strong, light airframe that can withstand the forces of aggressive 3D flight whilst remaining light enough for slow-speed indoor flying.
- Four Factory-Installed Spektrum Linear Servos — All four control servos arrive pre-installed with proper linkages and rigging, eliminating servo installation, programming and setup time whilst ensuring all control surfaces are optimally configured for 3D flight.
- No FAA Registration or Remote ID Required — With a weight of just 62.5 grams, the UMX Eratix 3D FF 450mm remains comfortably below the 250-gram regulatory threshold in the UK, meaning no expensive registration, paperwork or compliance equipment is necessary.
- Mild to Wild Flight Performance — The aircraft is equally capable of slow cruising and smooth sport flying as it is aggressive 3D manoeuvres, giving you versatile performance within a single flight so you can enjoy multiple flying styles without swapping aircraft.
- Easily Repairable Design — The foam construction is compatible with odourless foam-safe cyanoacrylate adhesive, foam-to-foam adhesives, and epoxy, meaning minor damage can be repaired quickly and inexpensively without specialist equipment or part replacement.
- Comprehensive Spare Parts Support — E-flite offers an extensive range of genuine spare and replacement parts including propellers, motor mounts, airframe sections, wheel pants, pushrods and more, ensuring you can keep flying for years to come.
Technical Performance
The UMX Eratix 3D FF 450mm is engineered around a brushless power system that delivers exceptional performance from minimal weight. The factory-installed Spektrum brushless outrunner motor provides ample thrust to achieve unlimited vertical performance and smooth 3D manoeuvres with standard 2S 7.4V lithium polymer batteries in the 280–350mAh capacity range. The integrated Spektrum control unit combines a brushless electronic speed controller and five-channel receiver in a single compact unit, eliminating the need for external ESC installation and reducing overall aircraft weight. The four Spektrum linear servos are pre-installed and configured for optimal control authority across all three axes, with proper throw and trim settings already factory-calibrated. The laser-cut foam airframe measures 450mm span and 487mm length, providing sufficient wing area and moment arms to deliver responsive, precise control even during slow-speed flight or when hovering near vertical. At just 62.5 grams total weight, the aircraft achieves the rare combination of being light enough for safe indoor operation whilst maintaining enough mass for stable outdoor flight in mild breezes. The composite reinforcement within the foam structure adds durability without significant weight penalty, making the airframe resistant to the impacts inherent in 3D flying. The aircraft's design philosophy embraces the flat foamy concept — a construction method proven to deliver superior 3D performance because flat foam construction allows oversized control surfaces that would be prohibitively heavy in traditional aeroplane designs. The exclusive AS3X technology continuously monitors aircraft attitude and applies corrective control inputs via the integrated flight controller, smoothing out the effects of wind gusts and turbulence to deliver stability that feels locked-in and predictable. When activated, SAFE Select further enhances stability by enforcing pitch and bank angle limits and automatic recovery to level flight, features that can be toggled on or off through your compatible Spektrum transmitter.
What's in the Box
- E-flite UMX Eratix 3D FF 450mm airframe with all components installed
- Spektrum linear servos (four units, factory-installed)
- Spektrum brushless outrunner motor with prop saver (factory-installed)
- Spektrum control unit featuring integrated five-channel receiver and brushless electronic speed controller (factory-installed)
- Product manual with setup and flying instructions
What You Need to Complete
- Full-range 5+ channel Spektrum DSMX/DSM2 compatible transmitter (such as DX6e, DX8e, DX6 G2/G3, DX8 G2, DX9, NX6–20, iX12–20 or similar)
- 2S 7.4V LiPo battery with capacity between 280–350mAh and 3-pin JST-PH connector (such as Spektrum 7.4V 300mAh 2S LiPo)
- Compatible LiPo battery charger with suitable adapter/charge lead if required (for example Spektrum S100 100W Smart Charger or equivalent, sold separately)
Frequently Asked Questions
- Is the UMX Eratix 3D FF 450mm suitable for RC aircraft beginners? — This aircraft is recommended for Skill Level 2 pilots with some experience flying higher-performance ultra-micro models like the UMX Timber series, or larger flat foamy aircraft such as the E-flite Eratix 3D FF 860mm. Beginners without prior RC aircraft experience should consider starting with a simpler trainer-oriented model before progressing to the UMX Eratix 3D FF 450mm, although the optional SAFE Select technology does provide helpful training features for newer pilots.
- What battery does the UMX Eratix 3D FF 450mm require? — The aircraft is compatible with 2S LiPo batteries in the 280–350mAh capacity range, with a 3-pin JST-PH connector. A compatible 2S 7.4V battery pack with this connector type is required to fly the aircraft. Spektrum offers suitable 2S LiPo batteries, and numerous third-party manufacturers produce compatible options.
- Can I fly this aircraft indoors? — Yes, the ultra-micro 450mm wingspan and 62.5-gram weight make this aircraft suitable for safe indoor flying in living rooms, garages, gymnasiums and conference rooms. Its light weight and responsive control systems are specifically designed to accommodate the confined spaces and low-speed flying requirements of indoor operation.
- What is the difference between this model and the larger Eratix 3D FF 860mm? — The UMX Eratix 3D FF 450mm is a scaled-down version of the full-size Eratix 3D FF 860mm, offering the same flat foamy aerobatic capabilities in a much smaller package suitable for indoor and confined-space flying. Both models feature identical AS3X and SAFE Select technology, brushless power systems, and factory assembly, but the smaller wingspan and lower weight of the UMX version make it practical for locations where the larger model would be impractical.
- What transmitter do I need for the UMX Eratix 3D FF 450mm? — You need a full-range 5+ channel Spektrum DSMX/DSM2 compatible transmitter. Suitable options include the DX6e, DX8e, DX6 G2/G3, DX8 G2, DX9, NX6–20, iX12–20 and similar Spektrum transmitters. The receiver binds to your transmitter using standard 2.4GHz DSMX technology.
- Does this aircraft have telemetry capability? — Yes, the UMX Eratix 3D FF 450mm features real-time flight battery voltage telemetry and other flight data transmitted to compatible Spektrum AirWare equipped transmitters including the DX6e, DX8e, DX6 G2/G3, DX8 G2, DX9, NX6–20, iX12–20 and others, allowing you to monitor battery status during flight.
- What does the SAFE Select feature do? — SAFE Select is an optional-use flight envelope protection system that provides pitch and bank angle limits along with automatic self-levelling. You can toggle SAFE Select on and off using a switch on your transmitter, allowing you to fly with protection assistance when learning and disabling it for unlimited 3D performance once you gain experience.
- Is the aircraft easy to repair if I crash? — Yes, the foam airframe construction is durable and easily repairable using odourless foam-safe cyanoacrylate adhesive, foam-to-foam adhesives, or epoxy. E-flite offers a comprehensive range of spare parts including replacement airframe sections, propellers, motor mounts, wheel pants and pushrods, allowing you to repair or replace damaged components affordably.
- Do I need FAA registration for the UMX Eratix 3D FF 450mm in the UK? — No, the aircraft weighs just 62.5 grams, which places it well below the 250-gram threshold that triggers UK regulatory requirements. You can fly this aircraft without registration or Remote ID compliance.
- How long does the battery last per flight? — Flight duration varies depending on flying style, battery capacity, and weather conditions. With a 280–350mAh 2S battery, expect roughly 5–15 minutes of flight time depending on whether you fly aggressively with constant 3D manoeuvres or more conservatively with smooth sport flying.
- What is the top speed of the UMX Eratix 3D FF 450mm? — The manufacturer's source materials do not specify a maximum speed. The aircraft is designed for versatile performance ranging from slow-speed hovering and smooth cruising to aggressive 3D manoeuvres, with actual speed dependent on throttle input and flying technique.
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 EFL UMX Eratix 3D FF 450mm BNF Basic with AS3X and SAFE Select A-EFLU02050 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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