Delivery Included
1 Year Warranty
Introduction
The Ultrix™ features a unique, all-new design that delivers a flight experience unlike any other, especially for models in the UMX™ (Ultra Micro eXtreme) class. This twin brushless motor-powered, delta wing airplane excels at smooth sport flying, basic aerobatics and even aggressive 3D - all in the same flight. Its incredible power-to-weight ratio provides hovering capability and unlimited vertical performance. Differential thrust adds yaw control and the ability to perform advanced aerobatic maneuvers including harriers, amazing flat spins and more. Plus EPP construction makes the Ultrix the most durable UMX model yet - ready to thrill RC pilots with more performance in more places and smaller spaces!
Features
- Innovative and unique design capable of smooth sport, aerobatic AND 3D flying
- Powerful twin brushless motors deliver the power to hover and climb out vertically
- Differential thrust for yaw control to perform flat spins and other maneuvers
- Ultra micro size can be flown in more places and smaller spaces
- Extremely durable yet lightweight, fully-moulded EPP airframe
- Industry-leading Spektrum™ 2.4GHz DSMX® technology
- Easy to fly with optional-use SAFE® Select flight envelope protection
- Unmatched stability and locked-in feel of AS3X® technology for smoother flight performance
- Optional LED light kit/set (sold separately; EFLU6455) for flying at night
- Fully factory-assembled and ready to fly
Overview
The UMX™ Ultrix™ is a smooth handling, extremely versatile delta wing with aerobatic and 3D capabilities that you might not expect based on its looks alone. The twin brushless motors deliver an incredible power to weight ratio that offers good speed, plenty of power to hover and unlimited vertical performance. Differential thrust adds the ability to perform harriers, flat spins and more amazing aerobatics. And extremely durable EPP construction makes this one of the toughest ultra micro models yet. The Ultrix handles windy conditions well, aided by exclusive AS3X® (Artificial Stabilization - 3-aXis) technology that works behind the scenes to smooth out the effects of wind and turbulence for a locked-in feel - it's like you're flying a much larger airplane. Optional-use SAFE® (Sensor Assisted Flight Envelope) Select technology makes the Ultrix easy enough for low-time pilots to enjoy, and the ultra micro size and lightweight construction are suited for flying almost anywhere. Skilled pilots can cut loose indoors in a space as small as a single basketball court, while large yards, sports fields and RC fields make ideal outdoor flying sites for just about everyone. Fully factory-assembled, the Ultrix is ready to fly within minutes of opening the box. Just add an affordable 1S 500mAh battery (EFLB5001S25) and bind it to a compatible Spektrum™ DSMX®/DSM2® equipped transmitter! You can even install the optional LED light kit (EFLU6455) for improved visibility during daylight conditions and to fly at night!
Needed to Complete- Full-range 5+ channel Spektrum™ DSMX®/DSM2® compatible transmitter
- 1S 3.7V 500mAh LiPo with JST Connector
- Compatible LiPo charger
What's in the Box?- (1) E-flite® UMX™ Ultrix™ with:
- (2) Brushless Motors (installed)
- (2) Linear Servo (installed)
- (1) Spektrum™ Receiver with (2) brushless ESCs (installed)
- (1) Product Manual
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. The result is a heightened sense of stability and precision that makes you 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 complex 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
- The simple procedure for assigning a transmitter switch to turn SAFE Select features on and off doesn't require any programming and takes just a few seconds.
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.
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- Wingspan: 342 mm
- Battery type: 500mAh 1S 25C LiPo (Recommended)
- Channels: 5
- Motor Type: 0805
- Length: 320 mm
The Eflite UMX A-EFLU6450 is a compact, high-agility RC helicopter engineered for precise indoor flight. With a 342mm rotor span, 320mm body length and a lightweight airframe powered by an 0805 motor, this model offers dependable performance for pilots looking to hone their flying skills in smaller spaces. It operates on a 1S500mAh25CLiPo battery, balancing strong power delivery with long-lasting control responsiveness. With 5 channels of control, it provides advanced manoeuvrability while maintaining user-friendly behaviour for intermediate and seasoned flyers.
What are the key features of Eflite UMX A-EFLU6450?
- 342mm rotor span – compact yet stable enough for precision flying
- 320mm length – small footprint suitable for indoor environments
- 0805 motor – delivers reliable direct-drive performance
- 1S500mAh25CLiPo recommended – efficient power source for extended indoor sessions
- 5 channel control – full cyclic, collective and tail rotor management
- UMX size – lightweight and portable for use in confined spaces
- Responsive flight behaviour – agile in tight corners and predictable in hover
- Great for practice – ideal model to develop control discipline and manoeuvre consistency
- Minimal setup – ready to go with transmitter and charged battery
- Durable and repairable – built to handle regular indoor flight use
How does the 342mm rotor span improve stability?
The 342mm main rotor diameter provides a generous surface area for controlled lift while maintaining compact form factor. This size allows stable hover and controlled pitch response, which helps when flying in confined spaces or when working on advanced manoeuvres in training.
Why is the 1S LiPo battery ideal for this model?
The recommended 1S500mAh25CLiPo battery provides the optimal combination of voltage and current draw for the 0805 motor. It enables smooth acceleration, balanced lift and enough endurance for several minutes of precise indoor flying without overloading the compact electronics system.
What does 5 channel control offer to pilots?
With 5 independent channels, pilots can control pitch, roll, yaw, throttle and tail rotor, offering full 3D cyclic control and tail orientation management. This control setup allows advanced handling and progression from simple hover to coordinated figure-eight and orientation training.
Is the A-EFLU6450 suitable for new RC helicopter pilots?
Yes, it’s a strong choice for intermediate learners and advancing beginners who are comfortable with 4 channel aircraft. The helicopter’s stability and responsive design allow users to grow their skills without jumping to larger, more powerful models too soon.
What makes the 0805 motor appropriate for micro helicopter use?
This compact motor size delivers efficient thrust without unnecessary weight, preserving flight time and allowing the aircraft to stay responsive. It offers smooth ramp-up and fine throttle control that complements the tight handling characteristics of the UMX platform.
If you're ready to build indoor RC flight skills with a responsive and durable micro helicopter, the Eflite A-EFLU6450 delivers stable handling, powerful performance and portability. Buy A-EFLU6450 today and sharpen your manoeuvres with every battery cycle.
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Brand and Model
Eflite A-EFLU6450
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Appliance Type
UMX RC helicopter micro indoor flyer
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Wingspan
342mm – rotor diameter for stable indoor hover and turning performance
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Length
320mm – compact body for controlled indoor manoeuvrability
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Battery Type
1S500mAh25CLiPo – recommended for smooth indoor power delivery
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Motor Type
0805 – lightweight direct-drive motor for efficient rotation
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Channels
5 – offers cyclic pitch roll yaw and throttle control with tail rotor function
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Flight Environment
indoor – engineered for small-space flying and practice routines
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Control Precision
high – suitable for accurate manoeuvres and hover discipline
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Skill Level
intermediate – designed for pilots developing coordinated control
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Frame Design
lightweight and durable – micro-scale build with protective structure
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Use Case
indoor RC helicopter training fine motor skill development cyclic control refinement
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
