E-Flite UMX Pitts S-1S BNF Basic with AS3X and SAFE Select RC Biplane - EFLU15250

The E-flite UMX Pitts S-1S (EFLU15250) is an ultra-micro aerobatic RC biplane supplied as Bind-N-Fly Basic, making it ideal for pilots who already own a compatible Spektrum transmitter. Based on the iconic Aviat Aircraft Company Pitts S-1S design, this officially licensed scale replica arrives 100% factory-assembled with a brushless outrunner motor, ESC, Spektrum receiver, and four linear servos all pre-installed. With a wingspan of 17.09 inches (434 mm) and a flying weight of around 5 oz with a 3S battery, it sits comfortably in the ultra-micro class — small enough to fly indoors in a gymnasium or outdoors in a park or sports field. AS3X stabilisation technology smooths out turbulence and gives the RC biplane a locked-in feel, while the optional SAFE Select flight envelope protection makes it accessible to pilots at Skill Level 2 who are still building aerobatic confidence. The power system accepts either a 2S 7.4V or 3S 11.1V 280–300mAh LiPo with a JST-RCY connector, so you can tune performance to suit your flying style.

Key Features

• AS3X (Artificial Stabilization 3-aXis) technology counteracts wind and turbulence in real time for a smoother, more precise flight feel
• Optional-use SAFE Select provides flight envelope protection that can be switched on or off to suit pilot experience
• 2S and 3S LiPo compatible brushless outrunner motor — use 2S 280mAh for moderate performance or 3S 300mAh for increased speed and unlimited vertical
• Real-time battery voltage telemetry transmitted to compatible Spektrum AirWare-equipped radios during flight
• EPS airframe construction keeps the aircraft lightweight and durable without requiring any assembly before flying

What's Included

• E-flite UMX Pitts S-1S airframe (fully factory-assembled)
• Brushless outrunner motor (installed)
• Brushless ESC (installed)
• Spektrum DSMX/DSM2 receiver (installed)
• 4x linear servos (installed)
• Product manual

What You Need

• 5+ channel Spektrum DSMX/DSM2 compatible transmitter (not included)
• 2S 7.4V or 3S 11.1V 280–300mAh LiPo battery with JST-RCY connector (not included)
• Compatible LiPo battery charger (not included)