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E-Flite UMX Ultrix BNF Basic (E-Flite EFLU6450 | EFLU6450)

Model: E-Flite EFLU6450
Dist. #: EFLU6450   SKU: EFLU6450

Customer Reviews: Rated 5.0 stars 5 of 5 (1 Review)

Out of stock

Price:  $139.99

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Updated on Oct 8, 2025 09:42:52 AM

UMX Ultrix BNF Basic...


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E-flite UMX Ultrix BNF Basic





Introduction
The Ultrix™ includes a unique, all-new style that delivers a flight experience unlike any other, specifically for designs in the UMX™ (Ultra Micro eXtreme) class. This twin brushless motor-powered, delta wing aircraft excels at smooth sport flying, basic aerobatics and even aggressive 3D — all in the exact same flight. Its amazing power-to-weight ratio provides hovering ability and unlimited vertical performance. Differential thrust adds yaw control and the ability to perform innovative aerobatic maneuvers including harriers, remarkable flat spins and more. Plus EPP building makes the Ultrix the most long lasting UMX model yet — ready to adventure RC pilots with more performance in more locations and smaller sized spaces!





Features

Ingenious and distinct style efficient in smooth sport, aerobatic AND 3D flying

Powerful twin brushless motors provide 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 locations and smaller sized spaces

Very long lasting yet light-weight, fully-molded EPP airframe

Industry-leading Spektrum™ 2.4GHz DSMX® technology

Easy to fly with optional-use SAFE® Select flight envelope defense

Unrivaled stability and locked-in feel of AS3X® technology for smoother flight performance

Optional LED light kit/set (sold separately; EFLU6455) for flying at night

Completely factory-assembled and ready to fly





Overview

The UMX™ Ultrix™ is a smooth handling, extremely flexible delta wing with aerobatic and 3D capabilities that you might not expect based upon its appearances alone. The twin brushless motors provide an incredible power to weight ratio that provides good speed, plenty of power to hover and unlimited vertical performance. Differential thrust adds the ability to perform harriers, flat spins and more remarkable aerobatics. And extremely long lasting EPP building makes this one of the hardest ultra micro designs yet. The Ultrix manages windy conditions well, aided by special AS3X® (Synthetic Stabilization – 3-aXis) technology that works behind the scenes to ravel the effects of wind and turbulence for a locked-in feel — it's like you're flying a much larger aircraft. Optional-use SAFE® (Sensor Helped Flight Envelope) Select technology makes the Ultrix easy enough for low-time pilots to delight in, and the ultra micro size and light-weight building are matched for flying nearly anywhere. Competent pilots can cut loose inside in a space as little as a single basketball court, while big lawns, sports fields and RC fields make ideal outside flying websites for just about everyone. Completely factory-assembled, the Ultrix is ready to fly within minutes of opening package. Simply include an affordable ONE 500mAh battery (EFLB5001S25) and bind it to a compatible Spektrum™ DSMX®/DSM2® equipped transmitter! You can even set up the optional LED light set (EFLU6455) for improved presence during daylight conditions and to fly at night!





Needed to Total

Full-range 5+ channel Spektrum™ DSMX®/DSM2® compatible transmitter

ONE 3.7V 500mAh LiPo with JST Port

Compatible LiPo charger

What's in the Box?

(1) E-flite® UMX™ Ultrix™ with:

(2) Brushless Motors (set up)

(2) Direct Servo (set up)

(1) Spektrum™ Receiver with (2) brushless ESCs (set up)

(1) Item Handbook





 




Distinctively Capable

Uniquely Capable
The distinct, innovative style of the UMX™ Ultrix™ makes it efficient in smooth sport flying, basic aerobatics and even aggressive 3D flying — all in the exact same flight!
 

Twin Power

Twin Power
Powerful twin brushless motors provide an incredible power-to-weight ratio to offer the ability to hover and unlimited vertical performance. Differential thrust provides yaw control and the ability to perform innovative aerobatic maneuvers including harriers, remarkable flat spins and more.
 




Resilient Style

Durable Design
The smooth and easy delta wing style is molded from light-weight yet extremely long lasting EPP, making the Ultrix™ among the hardest UMX™ aircraft ever.
 

Optional LED Lights

Optional LED Lights
Install the optional LED light set (EFLU6455) for improved presence during daylight conditions and to fly in darker conditions and even during the night.
 





Exclusive Technologies

Exclusive Technologies
This Bind-N-Fly® Fundamental model is geared up with special Spektrum™ AS3X® (Synthetic Stabilization – 3-aXis) and SAFE® (Sensor Helped Flight Envelope) Select innovations. AS3X works behind the scenes to ravel the effects of wind and turbulence to provide a locked-in feel that makes it appear like you're flying a much larger aircraft. Optional-use SAFE Select provides pitch and bank angle limits along with automated self-leveling that can be switched on and off at the flip of a switch, making the Ultrix™ easy to fly for low-time and experienced pilots alike.
 

Completely Factory-Assembled

Completely Factory-Assembled
The UMX™ Ultrix™ shows up 100% factory-assembled and is ready to fly within minutes of opening package. It's geared up with industry-leading Spektrum™ 2.4GHz technology that binds to your 5+ channel DSMX®/DSM2® equipped transmitter so you can be flying in nearly no time.
 





SAFE technology

Bind-N-Fly Conclusion Level Benefit
Currently own a Spektrum™ transmitter? Bind-N-Fly (BNF) aircraft make getting into the air rapidly and with the very best control experience possible easier than ever. They come out of package with the power system, servos and a Spektrum 2.4GHz receiver set up so all you require to do is bind the receiver to a compatible transmitter, end up any final assembly, and fly!

This Bind-N-Fly Basic model is geared up with a Spektrum 2.4GHz DSMX® receiver featuring AS3X (Synthetic Stabilization–3–aXis) technology that works behind the scenes to ravel the effects of wind and turbulence. The result is a heightened sense of stability and accuracy that makes you feel like you're flying a much larger, expertly tuned aircraft.

If this is your very first model of its type, or you desire an additional margin of security while familiarizing yourself with the aircraft, you can enable the optional-use SAFE® Select flight envelope defense technology built into the receiver. No complex programming is required.

With SAFE Select made it possible for, you get:

Pitch and Bank Angle Limits
These envelope limits keep the aircraft from rolling or pitching upside down. They likewise prevent extreme climb or dive angles.

Automatic Self-Leveling
The aircraft quickly returns to and holds level flight when the sticks are released and in the center position. It's likewise useful for keeping the wings level during takeoffs/launches and landings.

Easy Change Assignment
The easy treatment for designating a transmitter switch to turn SAFE Select features on and off doesn't require any programming and takes just a few seconds.

The easy treatment for designating a transmitter switch to turn SAFE Select features on and off doesn't require any complex programming and takes just a few seconds.




 

E-flite UMX Ultrix BNF Basic



Specs

Aileron: Yes

Approximate Assembly Time: Less than 1 Hour

CG (Center of Gravity): 6.9" (175mm) back from the nose with the battery at front of battery tray

Battery charger: ONE 3.7V LiPo

Conclusion Level: Bind-N-Fly Basic

Elevator: No

Flaps: No

Flying Weight: 0-250g, 2.29oz (65g)

Landing Gear: None

Length: 12.9" (320mm)

Minimum Required Radio: 5-channel

Minimum Speed Control: Receiver/ESC system set up

Motor Size: 0805

Prop Size: 60mm x 2.5mm

Recommended Motor Battery: 500mAh ONE 25C LiPo

Withdraws: No

Rudder: No

Servos: Two 2.3g long throw servos set up

Transmitter Variety: Full

Wingspan: 13.5" (342mm)

Frequently Bought Together

E-Flite UMX Ultrix BNF Basic
+
E-Flite 500mAh 1S 3.7V 25C LiPo Battery
+
E-Flite 1S USB Li-Po Charger, 500mA, JST: 180 QX HD
This Item: E-Flite UMX Ultrix BNF Basic
$139.99
E-Flite 500mAh 1S 3.7V 25C LiPo Battery
$11.99
E-Flite 1S USB Li-Po Charger, 500mA, JST: 180 QX HD
$14.49

Total Price: $166.47

Add All Three To Cart
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Rated 5 stars Best Micro Ever
By Loophole L on March 18, 2020   Verified Purchase

Spectacular micro ! Handles wind nicely; does flat spins on Stability mode, and "bullet dives" on Stunt two mode. Flies easily, lands gracefully. You can't go wrong with this fun bird !

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