Parts/Complete vehicles & kits/ARF / BNF aircraft/E-flite UMX™ Eratix 3D Flat Foamy BNF Basic Electric Airplane (450mm) w/AS3X® & SAFE® Select
E-flite UMX™ Eratix 3D Flat Foamy BNF Basic Electric Airplane (450mm) w/AS3X® & SAFE® Select
E-flite

E-flite UMX™ Eratix 3D Flat Foamy BNF Basic Electric Airplane (450mm) w/AS3X® & SAFE® Select

Part # EFLU020505.0(1)
Where to buy
$169.99
AMain Hobbies
Seen Oct 12, 2026
$169.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

Micro Aircraft with 3D Aerobatic Capability

The E-flite® UMX™ Eratix 3D Flat Foamy BNF Basic Electric Airplane combines compact size, precision engineering, and powerful performance for an unmatched ultra-micro flying experience. Scaled down from the popular Eratix 3D FF 860mm, this 450mm version delivers the same exceptional flat foamy (FF) aerobatic and sport-flying capabilities in smaller spaces. Arriving 100% factory assembled, it's designed for intermediate to experienced pilots who want to enjoy smooth, stable, and agile 3D flight almost anywhere.

About the UMX Eratix Airplane


Innovative Design

The UMX Eratix features a laser-cut, composite-reinforced flat foam airframe that balances lightweight agility with impressive durability. Oversized control surfaces and a streamlined structure provide exceptional 3D maneuverability, from hovering to rolling circles. Its portability and no-hassle setup mean you can enjoy top-tier aerobatic performance in nearly any location without the complexity of larger builds or extensive assembly time.

Advanced Electronics & Power System

This airplane is equipped with a powerful 2S-compatible brushless outrunner motor featuring a prop saver, delivering abundant thrust for unlimited vertical and precise 3D control. The integrated control unit includes an ESC and a Spektrum™ receiver with 2.4GHz DSMX® technology and real-time battery telemetry, while four factory-installed servos provide confident control. Together, these electronics ensure smooth, responsive handling and reliable performance during every flight session.

Smart Technology & Control

Exclusive Spektrum AS3X® technology works behind the scenes to counteract wind and turbulence, giving the UMX Eratix a locked-in, larger-airplane feel. Optional SAFE® Select technology adds flight envelope protection, including automatic self-leveling and pitch angle limits, which can be activated or deactivated with a switch. These features make the aircraft adaptable for both learning maneuvers and pushing the limits of advanced 3D flight.

Features:

  • Scaled-down 450mm version of the Eratix 3D FF 860mm
  • Lightweight, laser-cut flat foam airframe with composite reinforcement
  • Powerful 2S brushless outrunner motor with prop saver
  • Composite-reinforced flat foam construction for lightweight durability
  • Smooth, precise handling with integrated AS3X stabilization
  • SAFE Select technology for easier control
  • Real-time battery voltage telemetry with compatible transmitters
  • Oversized control surfaces for full 3D aerobatic capability
  • No FAA registration or Remote ID required

Includes:

  • (1) UMX Eratix 3D Flat Foamy BNF Basic Electric Airplane
  • (4) Pre-Installed Spektrum Linear Servos
  • (1) Pre-Installed Spektrum 1404 Brushless Outrunner Motor (3200kV)
  • (1) Pre-Installed Spektrum AS3X & SAFE Receiver/ESC Control Unit w/JST-PH Connector
  • Product Manual

Needed To Complete:

  • (1) Full-Range 5+ Channel Spektrum DSMX/DSM2® Compatible Transmitter
  • (1) 2S 280-350mAh LiPo Battery (7.4V) w/JST-PH Connector
  • (1) Compatible Battery Charger

Specifications:

Length 19.17in (487mm)
Wingspan 17.72in (450mm)
Weight 2.3oz (65.2g)
Material EPS
Power Source Electric
Input Voltage 2S LiPo (7.4V)
Motor Brushless
Technology AS3X and SAFE
Connector JST-PH
Skill Level 2 - Some Experience Required
Assembly Level BNF*

*Tech Note: Bind-&-Fly aircraft come equipped with all on-board electronics and still require a compatible transmitter for operation. Please check the Needed to Complete to make sure you have everything you need to get up in the air!

Manuals:

User Manual

CA Residents Prop 65 Warning WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...

Reviews5.0 · 1 review

Ryan SchneiderVerified owneron E-flite UMX™ Eratix 3D Flat Foamy BNF Basic Electric Airplane (450mm)

Fantastic Plane if you understand what it is, and what it is not. This is a great plane to fly indoors. If flies faster than a Twisted Hobbies plane, but it is a lot smaller than an Ulta Light Crack Yak. That allows you to fly in some pretty tight spots. I wish it had more throw in the elevator and rudder, but the throw is sufficient. I converted mine to xt30 to make it easier to charge and adapt batteries. It was too much of a pain to use the JST thing that comes on it. I do not find a weight penalty with the xt 30. The plane flies like a real plane rc plane. This is NOT a twisted hobbies, indestructible forgiving plane. If you crash it can be bad. If you crash a Twisted Hobby plane, it is usually unharmed. You need to land when the timer goes off. The prop is fine, but I wish they had offered with a traditional rubber band prop saver. The quick disconnect works to eject the prop on impact, but I have broken the prop anyway. The plane will hover, and do any trick you can attempt on a 60" balsa plane, but it is NOT a Crack Yak, that can be put back together with some foam tac in 5 minutes. It has plenty of power. It does have safe, but I have never used it. You do not have the option of turning off the gyro. I have flown in my front yard and with mild wind still a blast to fly. I do use the box as a carrying case. It seems twice as big as it needs to be. But it does work.

Builds using this part

No builds use this part yet — add it to yours from the build editor.