E-flite UMX Ultrix BNF Basic with AS3X and SAFE Select, 342mm
by E-flite

E-flite UMX Ultrix BNF Basic – High-Performance 342mm Twin Brushless Ultra-Micro Delta Wing

Experience an entirely unique class of ultra-micro flight with the E-flite UMX Ultrix BNF Basic. This ultra-versatile 342mm delta wing airplane shatters traditional micro-plane limitations, seamlessly transitioning from smooth sport cruising and standard aerobatics to aggressive, hover-capable 3D maneuvers all in a single flight. Molded entirely from exceptionally durable yet featherweight expanded polypropylene (EPP) foam, the airframe houses dual 0805 brushless outrunner motors spinning counter-rotating propellers. This setup delivers an incredible power-to-weight ratio for unlimited vertical climbs and high-speed runs. By utilizing electronic differential thrust, the Ultrix provides intense yaw authority, allowing pilots to execute wild flat spins, harriers, pirouettes, and unexpected stunt loops that blur the wingtips.

The electronics bay comes fully loaded with a factory-assembled Spektrum 2-in-1 receiver and dual brushless ESC unit featuring industry-leading 2.4GHz DSMX technology. To ensure smooth handling, the system relies on built-in AS3X artificial stabilization, which works behind the scenes to eliminate the buffeting effects of wind and turbulence, providing the locked-in feel of a much larger fixed-wing aircraft. Transitioning pilots can activate optional SAFE Select flight envelope protection to enforce precise pitch and bank angle limits alongside automatic self-leveling at the flip of a switch. Driven by dual 2.3-gram long-throw linear servos for crisp control surface deflection, this fully assembled micro flyer is highly optimized for intermediate RC hobbyists, outdoor park flying, indoor gym sessions, and school aerospace engineering programs looking to study advanced delta-wing aerodynamics.

Technical Specifications

• Model SKU Part Number: EFLU6450

• Wingspan Width: 13.5 inches (342 mm)

• Overall Fuselage Length: 12.9 inches (320 mm)

• Total Flying Weight: 2.29 oz (65 grams) without battery

• Airframe Material Composition: Fully-Molded, Crash-Resistant EPP Foam

• Propulsion Type: Dual Brushless Outrunner Electric Motors (0805 Size)

• Propeller Dimensions: 2x Counter-Rotating 60 mm x 2.5 mm Propellers

• Onboard Servos: 2x 2.3-Gram Long-Throw Performance Linear Servos

• Receiver Architecture: Spektrum DSMX 2.4GHz Receiver & Dual ESC Combo Unit

• Flight Stabilization Matrices: Integrated AS3X and Optional-Use SAFE Select

• Input Battery Requirement: 1S 3.7V 500mAh LiPo Battery with JST Connector (sold separately)

• Minimum Required Radio Control: Full-Range 5+ Channel Spektrum DSMX/DSM2 Transmitter (sold separately)

• Completion Level Configuration: Bind-N-Fly (BNF) Basic

• Telemetry Capabilities: Built-in flight battery voltage tracking

• Optional Modification Support: Accepts E-flite EFLU6455 LED Night Flight Kit (sold separately)

What's Included

• 1 x E-flite UMX Ultrix 342mm Airframe Assembly

• 2 x 0805 Brushless Outrunner Motors (Factory-Installed)

• 2 x 2.3g Performance Linear Servos (Factory-Installed)

• 1 x Spektrum Receiver with Dual Brushless ESCs (Factory-Installed)

• 1 x Product Setup and Instruction Manual