Product Details
The E-flite
® UMX
™ Slow Ultra Stick is an ultra-micro "slow flyer" that was inspired by classic "Stick" models of the past and has been scaled down from the Slow Ultra Stick 1.2m so it can be flown in even more places and smaller spaces - indoors or out!
Key Features
- Ultra-micro sized to fly in yards, at parks, or even indoors in a garage, gymnasium, and other suitable spaces
- Factory-installed control unit featuring a dual-protocol Spektrum 2.4GHz DSMX and SLT receiver, two servos, and an ESC
- Ready for use with your compatible Spektrum DSMX or SLT-equipped transmitter, battery, and charger (sold separately)
- Affordable 1S 100-210mAh batteries deliver a wide range of performance and flight times
- Lightweight yet durable construction, including a "pop off" prop saver design to prevent damage
In The Box
- (1) E-flite UMX Slow Ultra Stick with:
- (1) Motor and Gearbox with Prop Saver (installed)
- (1) Spektrum Dual-Protocol (DSMX and SLT) Receiver, ESC, and (2) Linear Servo Control Unit (installed)
- (1) Product Manual
Needed to Complete
- 5+ channel Spektrum DSMX or SLT-compatible transmitter
- 1S 3.7V 100-210mAh LiPo battery with JST PH 1.25 (ultra micro) connector
- Compatible LiPo battery charger
Introduction
Scaled down from the extremely popular Slow Ultra Stick 1.2m and inspired by the classic ParkZone Ember models, the E-flite UMX Slow Ultra Stick is an ultra-micro "slow flyer" that can be flown in even more places and smaller spaces! Use a range of 1S batteries for flying indoors in gymnasiums, garages, and other suitable spaces or to fly outside almost anywhere in calm to low wind conditions. The UMX Slow Ultra Stick is capable of slow and easy cruising and performing basic aerobatics including loops. You can even install the optional LED light set to fly in darker conditions and at night. Plus, you can choose between two factory-assembled versions: the convenient, all-in-one-box RTF (Ready-To-Fly) version that includes a Spektrum battery, charger, and an SLT6 transmitter equipped with a USB-C port for direct connection to a PC for easy plug-and-play use of the included trial version of the RealFlight Trainer Edition RC flight simulator. Or the BNF (Bind-N-Fly®) Basic version that helps you lower costs by using your own compatible Spektrum DSMX/SLT-equipped transmitter, battery, and charger. Either way, you can be flying almost anywhere in just the time it takes to charge a battery!
Overview
The E-flite UMX Slow Ultra Stick is simple and affordable. It's also incredibly easy and fun to fly for low-time to experienced pilots looking for a no-hassles fly-almost-anywhere experience they can't get with any other model! Based on the more modern-day design of the Slow Ultra Stick 1.2m and inspired by similar "slow flyer" models from the past, it can be flown in even more places and smaller spaces - indoors and out. Use a 1S 100-150mAh battery to fly indoors in garages, conference rooms, and gymnasiums. Or, use up to a 210mAh battery to fly outdoors almost anywhere in calm to low wind conditions. You can even fly in lower light conditions and at night after installing the optional LED light set (EFL-1113)!
The Ready-To-Fly (RTF) version includes everything needed to fly in one box and is a perfect choice if you're looking for maximum convenience and value. From the Spektrum SLT6 2.4GHz transmitter you can use with other Bind-N-Fly® (BNF) Basic aircraft compatible with SLT FHSS technology to the 1S 150mAh LiPo battery and a convenient USB charger that can be used with a variety of power sources, there's nothing extra you need to buy or provide! A BNF Basic version is also available for pilots who want to use their favorite Spektrum DSMX-equipped transmitter along with batteries and chargers they may already own. Both versions include exclusive AS3X® and optional-use SAFE® Select technologies, plus a reliable power system featuring a "pop off" prop saver design, a control unit including an ESC, servos, and a dual-protocol (DSMX and SLT FHSS) receiver that are factory-installed in the lightweight yet durable airframe that's nearly ready to fly right out of the box. Simply install the wing by quickly and easily snapping it into place and you can be flying in almost no time!
Although we recommend learning to fly RC with one of our purpose-built trainer aircraft, such as the HobbyZone® Apprentice STOL S 700mm, the RTF version also includes a Steam® key to download and activate a trial version of the RealFlight® Trainer Edition RC flight simulator. The simulator features many of the most popular Horizon Hobby trainer airplanes, helicopters, and built-in Virtual Flight Instructor lessons. This helps new and low-time pilots learn to fly successfully by practicing on a desktop PC at home or on a laptop just about anywhere else! Simply use a USB-C cable to connect the included SLT6 transmitter to a compatible USB port on your computer to fly for up to 100 minutes. Then, you can purchase RealFlight Trainer Edition or Evolution to fly any time and for as long as you'd like!
Features
- Inspired by the classic ParkZone Ember "slow flyer" models and scaled down from the very popular Slow Ultra Stick 1.2m
- Ultra-micro sized to fly in yards, at parks, or even indoors in a garage, gymnasium, and other suitable spaces
- Factory-installed control unit featuring a dual-protocol Spektrum 2.4GHz DSMX and SLT receiver, two servos, and an ESC
- Ready for use with your compatible Spektrum DSMX or SLT-equipped transmitter, battery, and charger (sold separately)
- Compatible with the DXS and SLT6 transmitters included with many RTF trainer models
- Easier to fly with innovative and optional-use SAFE® Select flight envelope protection
- The unmatched stability and locked-in feel of expertly-tuned AS3X® technology
- Real-time battery voltage telemetry with compatible Spektrum transmitters
- Affordable 1S 100-210mAh batteries deliver a wide range of performance and flight times
- Lightweight yet durable construction, including a "pop off" prop saver design to prevent damage
- Factory-assembled with a quick and easy-to-install/remove/replace wing that snaps into place
- Fly in low light conditions and at night using the optional LED light kit/set (sold separately; EFL-1113)
- Full line of replacement/spare parts available
- No FAA registration or Remote ID required (under the 250-gram weight limit)
Bind-N-Fly Completion Level Advantage
Already own a Spektrum transmitter? Bind-N-Fly (BNF) aircraft make getting into the air quickly and with the best control experience possible easier than ever. They come out of the box with the power system, servos and a Spektrum 2.4GHz receiver installed so all you need to do is bind the receiver to a compatible transmitter, finish any final assembly and fly!
This Bind-N-Fly Basic model is equipped with a Spektrum 2.4GHz DSMX receiver featuring AS3X (Artificial Stabilization-3-aXis) technology that works behind the scenes to smooth out the effects of wind and turbulence so you enjoy a sense of stability and precision that makes it feel like you're flying a much larger, expertly tuned aircraft.
If this is your first model of its type, or you want an extra margin of safety while familiarizing yourself with the airplane, you can enable the optional-use SAFE Select flight envelope protection technology built into the receiver. No programming is required.
With SAFE Select enabled, you get:
Pitch and Bank Angle Limits
- These envelope limits keep the airplane from rolling or pitching upside down. They also prevent excessive climb or dive angles.
Automatic Self-Leveling
- The airplane instantly returns to and holds level flight when the sticks are released and in the center position. It's also helpful for keeping the wings level during takeoffs/launches and landings.
Easy Switch Assignment-No Complex Programming Required
- The simple procedure for assigning a transmitter switch to turn SAFE Select features on and off doesn't require any complex programming and takes just a few seconds. For UMX models like this one, SAFE Select is automatically assigned to channel 5 (Gear) so you can turn it on and off with any switch assigned to that channel (switch A by default on most Spektrum computer transmitters).
- Model: E-flite UMX Slow Ultra Stick BNF Basic
- Model Number: EFLU03050
- Brand: E-flite
- Aircraft Type: Ultra-micro slow flyer
- Power Type: Electric
- Completion Level: Bind-N-Fly Basic (factory-assembled, requires transmitter, battery and charger)
- Skill Level: Level 2
- Wingspan: 501 mm (19.74 inches)
- Length: 442 mm (17.39 inches)
- Weight without battery: 42 g (1.48 oz)
- Weight with recommended battery: 46 g (1.62 oz)
- Airframe Material: EPS foam
- Motor: Integrated with gearbox (pre-installed)
- Propeller Saver: Pop-off design (pre-installed)
- Servos: Two linear servo actuators (pre-installed as part of control unit)
- Electronic Speed Control: Integrated Spektrum ESC (pre-installed as part of control unit)
- Receiver: Spektrum dual-protocol (DSMX and SLT) 2.4GHz (pre-installed)
- Radio Protocol: DSMX and SLT (dual-protocol)
- Radio Frequency: 2.4GHz
- Minimum Transmitter Channels: 5+
- Compatible Transmitters: Spektrum DSMX or SLT-equipped transmitters including DXS and SLT6
- Battery Type: 1S LiPo (3.7V)
- Battery Capacity Range: 100–210 mAh
- Battery Connector: JST PH 1.25 (ultra micro)
- Recommended Battery Voltage: 1S 3.7V
- Stabilisation Technology: AS3X (Attitude Stabilisation via Gain Scheduling)
- Flight Protection: SAFE Select (optional-use flight envelope protection)
- Battery Telemetry: Real-time battery voltage display with compatible Spektrum transmitters
- Wing Design: Quick snap-in connector for easy installation and removal
- Optional Accessories: EFL-1113 LED light kit for low-light and night flying
- Replacement Parts: Full range available including propellers, motors, servos, wings, fuselage boom, vertical tail, control horns, battery tray, motor mount, pushrod set, receiver tray, and wing mount components
- Airworthiness: Under 250g weight—no FAA registration or Remote ID required
- Flying Environments: Suitable for indoor (gymnasiums, garages) and outdoor (calm to low wind conditions) flying
- Flight Capabilities: Slow and easy cruising, basic aerobatics including loops
Overview
The E-flite UMX Slow Ultra Stick BNF Basic with AS3X and SAFE Select represents the pinnacle of ultra-micro RC aircraft design for UK enthusiasts seeking a versatile slow flyer that can be enjoyed almost anywhere. This factory-assembled electric RC plane has been expertly scaled down from the extremely popular Slow Ultra Stick 1.2m and draws inspiration from the classic ParkZone Ember models, delivering authentic slow-flight characteristics in a compact package that weighs just 42 grams without battery. Whether you're a seasoned RC pilot looking for an indoor trainer, a weekend flyer seeking a portable aircraft for small parks and gardens, or someone discovering the world of RC aviation for the first time, the UMX Slow Ultra Stick offers accessibility, performance and genuine flying pleasure in a ready-to-fly format that requires minimal setup before you can launch into the air.
This Bind-N-Fly Basic model arrives factory-assembled with a lightweight yet incredibly durable EPS foam airframe and a complete integrated control system installed and ready to use. The aircraft can be flown in multiple environments—indoors in gymnasiums, garages and other suitable spaces, or outdoors almost anywhere in calm to low wind conditions. Because the UMX Slow Ultra Stick weighs under 250 grams, it requires no FAA registration or Remote ID, making it the perfect choice for hassle-free flying. The quick snap-in wing design allows for easy installation and removal, whilst the pop-off propeller saver helps minimise damage from minor crashes, keeping repair costs and downtime to a minimum.
The aircraft is specifically designed for slow and easy cruising alongside basic aerobatics including loops, making it ideal for building confidence and developing core piloting skills. With optional-use SAFE Select flight envelope protection and expertly-tuned AS3X stabilisation technology, the UMX Slow Ultra Stick provides a locked-in, confidence-inspiring feel that makes flying more enjoyable and forgiving. Real-time battery voltage telemetry with compatible Spektrum transmitters keeps you informed during every flight, whilst affordable 1S batteries ranging from 100 to 210 mAh deliver flexible performance options and extended flight times without breaking the bank.
Key Features
- Ultra-Micro Slow Flyer Design — Scaled down from the proven Slow Ultra Stick 1.2m and inspired by classic ParkZone Ember models, this aircraft is small enough to fly in yards, parks, garages, gymnasiums and other confined spaces where traditional RC aircraft cannot operate, whilst maintaining authentic slow-flight characteristics and excellent handling.
- Factory-Installed Spektrum Dual-Protocol Control Unit — The aircraft arrives fully assembled with an integrated Spektrum 2.4GHz DSMX and SLT receiver, dual linear servos, and electronic speed control pre-installed, meaning no soldering, wiring or assembly is required—simply bind to your transmitter and fly.
- AS3X Stabilisation Technology — E-flite's expertly-tuned AS3X (Attitude Stabilisation via Gain Scheduling) system provides unmatched stability and a locked-in feel that smooths out turbulent air and pilot inputs, making the aircraft more forgiving and enjoyable to fly, particularly in gusty conditions.
- Optional SAFE Select Flight Envelope Protection — When activated via your compatible Spektrum transmitter, SAFE Select prevents inadvertent deep stalls and excessive pitch angles, providing an extra layer of confidence for intermediate pilots or those learning new manoeuvres without restricting advanced aerobatic capability.
- Bind-N-Fly Basic Configuration — This BNF Basic version allows you to use your own compatible Spektrum DSMX or SLT-equipped transmitter, battery and charger, significantly lowering the total cost compared to fully integrated ready-to-fly packages whilst maintaining factory assembly quality and reliability.
- Lightweight Durable EPS Foam Construction — The airframe utilises impact-resistant expanded polystyrene foam that is both extremely light (just 42 grams without battery) and surprisingly durable, absorbing minor impacts whilst remaining rigid enough for precise aerobatics and smooth cruising flight.
- Pop-Off Propeller Saver Design — The propeller saver mechanism allows the prop to safely separate from the motor during ground strikes or crashes, preventing damage to the gearbox, motor and fuselage—a feature that significantly reduces repair costs and keeps your aircraft flight-ready.
- Quick Snap-In Wing System — The wing attaches and detaches in seconds using a simple snap-fit connector, allowing you to transport the aircraft easily, swap damaged wings quickly, or adjust the aircraft configuration without tools.
- Affordable 1S Battery Compatibility — The aircraft accepts any 1S 3.7V LiPo battery from 100 to 210 mAh with a JST PH 1.25 ultra-micro connector, offering flexibility in flight time and performance—budget options provide extended flights whilst higher capacity batteries deliver sportier handling.
- Real-Time Battery Voltage Telemetry — Compatible Spektrum transmitters display live battery voltage data throughout your flight, allowing you to monitor power levels and land safely before the battery becomes depleted, extending battery lifespan and preventing in-flight power loss.
- Optional LED Light Kit Compatibility — The EFL-1113 LED light set (sold separately) can be installed to extend flights into low-light conditions and enable night flying, transforming the aircraft into an evening performer for extended flying sessions.
- Extensive Spare Parts Availability — A comprehensive range of genuine replacement and optional parts is available, including propellers, motors, servos, wings, fuselage components and control surfaces, ensuring your aircraft can be maintained and upgraded throughout its operational life.
- Sub-250g Weight — No Registration Required — At just 42 grams, the UMX Slow Ultra Stick falls well under the 250-gram threshold that triggers FAA registration requirements, eliminating bureaucratic obstacles and allowing you to focus entirely on flying enjoyment.
Technical Performance
The E-flite UMX Slow Ultra Stick BNF Basic delivers exceptional performance through meticulous engineering and high-quality component selection. The aircraft measures 501 millimetres across the wingspan and 442 millimetres in length, creating a compact profile perfectly proportioned for its 42-gram airframe. Power delivery comes from a purpose-designed motor paired with an integrated gearbox (both pre-installed) and a factory-tuned electronic speed control that works seamlessly with the dual Spektrum servo linear actuators to provide precise, responsive flight control. The dual-protocol receiver accepts both DSMX and SLT signals from modern Spektrum 2.4GHz transmitters, ensuring compatibility with the popular DXS and SLT6 units supplied with many trainer packages. Battery integration is straightforward thanks to the JST PH 1.25 ultra-micro connector, a standard format used across the ultra-micro RC aircraft industry. The recommended 1S 3.7V battery capacity of 100 to 210 mAh offers intelligent flexibility—a 100 mAh battery provides extended flight times perfect for relaxed cruising, whilst a 210 mAh pack delivers snappier throttle response and more dynamic aerobatic capability. The aircraft's EPS foam construction combines impact absorption with structural rigidity, maintaining aerodynamic efficiency whilst offering forgiving crash characteristics. Build quality is exceptional throughout, with factory assembly ensuring all components are perfectly aligned and calibrated before dispatch. The combination of AS3X stabilisation and optional SAFE Select protection creates a flying experience that feels locked-in and confidence-inspiring, particularly in variable wind conditions or for pilots building their skills in more demanding outdoor environments.
What's in the Box
- E-flite UMX Slow Ultra Stick aircraft airframe
- Motor and gearbox with integrated prop saver (pre-installed)
- Spektrum dual-protocol (DSMX and SLT) receiver, electronic speed control, and dual linear servo control unit (pre-installed)
- Product manual with assembly, setup and flying instructions
What You Need to Complete
- 5+ channel Spektrum DSMX or SLT-compatible radio transmitter (suggested compatibility with DXS and SLT6 units)
- 1S 3.7V LiPo battery with capacity between 100 and 210 mAh, featuring JST PH 1.25 ultra-micro connector
- Compatible LiPo battery charger capable of charging 1S packs
Frequently Asked Questions
- Is the E-flite UMX Slow Ultra Stick suitable for beginners and intermediate pilots? — Yes, absolutely. The aircraft is rated as Skill Level 2, making it accessible to pilots with basic experience. The combination of AS3X stabilisation and optional SAFE Select flight envelope protection provides stability and forgiveness that builds confidence, whilst the slow flight characteristics and manageable control inputs prevent the aircraft from becoming uncontrollable even with imperfect pilot technique. The pop-off prop saver and durable foam construction mean minor mistakes won't result in expensive repairs.
- What battery does the UMX Slow Ultra Stick require and how long will it fly? — The aircraft accepts 1S 3.7V LiPo batteries with capacities between 100 and 210 mAh, featuring JST PH 1.25 ultra-micro connectors. Battery choice offers intelligent flexibility: a 100 mAh battery provides extended flight times ideal for leisurely cruising in light winds, whilst a 210 mAh battery delivers snappier response for more dynamic flying. Actual flight time depends on battery capacity, wind conditions and flying style, but expect anywhere from 5 to 15 minutes per charge with typical sport flying.
- Can I use my existing Spektrum transmitter with this aircraft? — Yes, provided your transmitter is equipped with either DSMX or SLT protocol and has at least 5 channels. The aircraft will bind to DXS and SLT6 transmitters (commonly included with other Spektrum trainer kits), as well as any other compatible 5+ channel Spektrum radio. It will not work with older DSM2 protocol transmitters.
- How does this aircraft compare to the larger Slow Ultra Stick 1.2m model? — The UMX is a scaled-down ultra-micro version of the proven Slow Ultra Stick 1.2m, designed specifically for flying in smaller spaces including indoor environments like gymnasiums and garages. Whilst the larger model requires more space and offers extended flight times, the UMX delivers the same slow-flight characteristics and handling in a portable package that weighs under 250 grams, requires no FAA registration, and can be transported easily. Both aircraft share the same design philosophy and use identical Spektrum control technology.
- Can I extend flights into low-light conditions and night flying? — Yes. The optional EFL-1113 LED light set (sold separately) can be installed on the UMX Slow Ultra Stick, allowing you to fly in darker conditions and at night. The LED system is specifically designed for ultra-micro aircraft and integrates with the aircraft's power system.
- What happens if I crash and damage the aircraft? — The pop-off prop saver minimises damage during ground strikes by allowing the propeller to safely separate from the motor. The durable EPS foam construction absorbs impacts that would severely damage balsa or composite aircraft. Extensive replacement and spare parts are available, including propellers, motors, servos, wings, fuselage boom sections, tail surfaces and control components, allowing you to repair or upgrade almost any part of the aircraft.
- Is the dual-protocol receiver (DSMX and SLT) a significant advantage? — Yes. DSMX is the modern standard used by most current Spektrum transmitters and provides robust 2.4GHz digital signal transmission, whilst SLT (Spektrum Legacy Technology) compatibility ensures the aircraft will bind to older Spektrum radio systems. This dual compatibility offers maximum flexibility when matching the aircraft to your existing transmitter collection and future purchases.
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 Slow Ultra Stick BNF Basic with AS3X and SAFE Select 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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