E-flite Ultra-Micro UMX Pitts S-1S BNF Basic Electric Airplane (434mm)

E-flite Ultra-Micro UMX Pitts S-1S BNF Basic Electric Airplane (434mm)
Price: $129.99
Discontinued Online
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This is the E-flite Ultra-Micro UMX Pitts S-1S BNF Basic Electric Airplane. The E-flite UMX Pitts S-1S airplane makes it possible to enjoy the aerobatic icon of the century in your own back yard. Even more remarkable is how predictable this beautiful bipe handles. That’s because its AS3X system has been custom-tuned to deliver stability when you need it and agility when you want it. The result is a scale aerobatic flight experience similar to that of an expertly tuned giant-scale model. And the best news of all is that you can enjoy it right away because there’s no assembly required.

Scale Character
The UMX Pitts S-1S is designed so that the distinctive scale character comes through without sacrificing the performance benefits of a light wing loading. Not only is detail like rib and stringer detents obvious, even the landing gear and tail wheel represent the celebrated features of an aerobatic platform many full-scale pilots still use to this day for aerobatic competition.

High-Ouput Brushless Power System
The high-output brushless power system installed consists of an 180BL, 3000kV outrunner motor and an E-flite 5 x 2.75 propeller. Together they provide ample thrust for realistic scale aerobatic performance.

State of the Art Electronics
From the solid control of AS3X system technology, to the crisp response of performance linear long-throw servos, everything about the UMX Pitts S-1S is about delivering a solid scale aerobatic experience. Even though it’s sized to fly just about anywhere, you get the precision and performance to fly like you’re in an air show.

The Scale Aerobatic Bipe You've Always Wanted
The Artificial Stability – 3 aXis (AS3X) system developed by Horizon Hobby is an electronic innovation that makes the RC flight experience better than ever. By developing a unique combination of multi-axis sensors and exclusive software, the AS3X system in the UMX Pitts S-1S ultra micro biplane works behind the scenes while flying to provide instantaneous attitude corrections when turbulence, torque and tip stalls haphazardly interrupt the way you want to fly. The obvious benefit is an airplane that flies incredibly smooth but also delivers control that feels natural and utterly accurate. The result is an experience similar to that of flying a much larger, well-tuned scale model that’s remarkably convenient to fly. 


  • Completely built and flight ready
  • AS3X system provides great handling with amazing stability
  • Carbon fiber reinforced, lightweight foam construction
  • Steerable tail wheel for easy maneuvering on the ground
  • Four-channel, scale aerobatic maneuverability and control
  • Easy-access, forward battery hatch with magnetic attachment

17.1 in (434mm)
Overall Length: 15.5 in (393mm)
Wing Area: 100 sq. in. (645 sq. cm.)
Flying Weight: 3.2 oz (90 g)
Motor Size: 180-size, 3000Kv brushless outrunner (installed)
Radio: 4+ channel DSM2/DSMX transmitter, required
Prop Size: 5.75 x 2.25
Recommended Battery: 7.4V 2S 200mAh 25C LiPo, required
Flaps: No
Retracts: No
Approx. Flying Duration: 6-8 minutes
Minimum Age Recommendation: 14 years
Experience Level: Intermediate
Recommended Environment: Indoor/Outdoor
Is Assembly Required: No


  • BNF UMX Pitts S-1S Airplane
  • 180BL 3000kV Brushless Outrunner Motor
  • Spektrum 6-Channel AS3X Receiver w/BL ESC
  • (4) 2.3-Gram Performance Linear Long Throw Servos

Needed To Complete:

  • 2.4GHz 4+ Channel DSM2 or DSMX Transmitter
  • 7.4V 2S LiPo Battery Pack (150-200mAh)
  • Compatible Battery Charger

This product was added to our catalog on May 22, 2014

Wednesday, Aug 1 2018 (about 3 years ago)
E-flite Ultra-Micro UMX Pitts S-1S BNF Basic Electric Airplane (434mm)
I have had the UMX Pitts for several years now and it is still going strong. Ive had several hard crashes with it and I can attest that it is strong and withstands regular abuse. Ive had to fix a few things here and there with foam safe CA and Ive added some BBQ skewres to the inside of the struts when they got crumpled and you can hardly tell. Flew great new and stills flys great now. The AS3X makes flying this tiny Pitts not only possible but easy! Who would of thought touch and goes would be fun in a Pitts?! Knifes edges, four point rolls, hamerheads and anything else you can think of are flown as if on rails. Cant say enough good things about it. I bought the Spyder 350mah batteries that give it much better flight times, 8-10 minutes depending on power use, however these may not be availabe anymore. Buy without hesitation! I’m tempted to buy another for a spare in case they get discontinued!
Verified Owner
Wednesday, Jun 7 2017 (about 4 years ago)
E-flite Ultra-Micro UMX Pitts S-1S BNF Basic Electric Airplane (434mm)
I got a little too cocky with my first one so I just ordered a second one. This is a great little flyer with plenty of pep. The flight time is a little short with the 200mAh battery but its enough to still have a blast with this little flyer.
Verified Owner
Thursday, Sep 5 2019 (about 2 years ago)
E-flite Ultra-Micro UMX Pitts S-1S BNF Basic Electric Airplane (434mm)
Been flying helicopters for years so I decided to try airplanes. I started with a umx timber with safe mode and quickly decided airplanes are really fun to fly and with safe, great trainer! The timber is a great little airplane so I ordered up a umx pitts and quickly discovered airplanes are a whole lot of fun and excitement. Must say the pitts not only will challenge any beginner but will certainly sharpen your flying skills quickly. Great little bi-plane. Love it!!
Thursday, Jun 27 2019 (about 2 years ago)
E-flite Ultra-Micro UMX Pitts S-1S BNF Basic Electric Airplane (434mm)
Wondering if this is the best UMX plane from Horizon ever. This plane can (almost) everything. It flies very fine scale and you can do just about any 3D moments. It has an incredible roll rate. It has enough power to fly straight up. It is quite heavy compared to many other UMX's so it tackles wind quite well. May not be recommended as your first RC plane, but definitely as your second. And with this in the hangar, you don't need any more planes. Almost.