E-flite EFLU1280 Airplane (Discontinued)

This item is discontinued but parts are still available in the Parts List below.


The E-flite® UMX™ ASK-21 model is a scale RC sailplane of the renowned two-seater designed by Rudolf Kaiser and built by the famous Alexander Schleicher GmbH & Co. A first of its kind, the UMX ASK-21 plane is an elegant, fully-functional 4-channel aircraft that, at altitude, is capable of loops and rolls, as well as thermal or slope soaring that's popular around the world. Lightweight and sleek, its onboard AS3X® System is custom tuned to offer the silky-smooth experience of flying a Giant-Scale sailplane, even in breezy conditions. Like a Giant-Scale sailplane, the UMX ASK-21 plane is equipped with remote tow hook release control, making it aerotow capable when paired with a powerful RC airplane like the E-flite UMX Carbon Cub SS (EFLU1180). You’ll find that its onboard AS3X System is excellent at stabilizing the various flight conditions an unpowered model can encounter, especially at high speeds during launch on the Hi-Start or tow line. The UMX ASK-21 plane can be ready for its first flight in just a few minutes. Just charge the included Li-Po battery and bind to your own full-range DSM2® or DSMX® 4-channel transmitter, such as the Spektrum™ DX4e transmitter.


  • AS3X® System for silky-smooth handling and precision
  • Four-channel control including remote tow hook release
  • Elegant scale appearance with outstanding thermal performance
  • Smooth-molded construction with carbon fiber reinforcement
  • Removable one-piece wing with high efficiency airfoil
  • Performance ultra micro, linear long-throw servos (installed)
  • High-power series 1S Li-Po receiver battery and fast charger (included)
  • Hi-Start launch system included (~120 foot unstretched length)

You Will Need

- 4+ channel DSM2®- or DSMX®-compatible full-range transmitter


Wingspan: 33.9 in (860mm)
Overall Length: 17.0 in (432mm)
Flying Weight: 2.56 oz (72.5 g)
Wing Area: 80.4 sq in (520 sq cm)
Recommended Environment: Outdoor
Recommended Battery: 3.7V 1S 150mAh 25C Li-Po
Experience Level: Intermediate
Is Assembly Required: No
Minimum Age Recommendation: 14 years
Flaps: No

Parts List (9 items)

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