Overview
The E-flite UMX Pitts S-1S BNF Basic with AS3X and SAFE Select (model A-EFLU15250) represents the ultimate evolution in ultra-micro aerobatic RC aircraft design. This officially licensed scale replica of the iconic Aviat Pitts S-1S has been completely updated and upgraded to deliver an unmatched flying experience for pilots of all skill levels. Whether you're searching for a brushless RC plane UK enthusiasts recommend or looking for ready-to-fly aerobatic aircraft, the UMX Pitts S-1S stands out as the most affordable, convenient, and easiest-to-fly Pitts model ever created. With its compact ultra-micro dimensions, this electric RC plane can be flown indoors in gymnasiums and other large spaces, as well as outdoors in parks, sports fields, and suitable open spaces across the UK.
As a Bind-N-Fly Basic model, the UMX Pitts S-1S arrives 100% factory-assembled and ready to fly right out of the box, making it ideal for both new and experienced RC pilots. The aircraft combines the proven aerobatic pedigree of the full-size Pitts design—a aircraft that has dominated competition flying for decades—with modern RC technology that makes it genuinely easy to fly. According to Aviat Aircraft Company, the real Pitts S-1S is an aircraft you don't just fly—you wear it. The responsive controls and proven design that make the full-size aircraft such a potent competition machine are captured perfectly in this ultra-micro electric RC plane, now enhanced with cutting-edge stabilisation and protection technologies.
The updated power system is now compatible with both 2S and 3S LiPo batteries, giving you complete flexibility in choosing your flying experience. Install 2S 280mAh batteries for performance similar to the original model, or upgrade to 3S 300mAh batteries for exhilarating speed and unlimited vertical performance. Combined with the factory-installed brushless motor and ESC, the UMX Pitts S-1S delivers lively, responsive performance that makes every flight session unforgettable. This is a genuine ready-to-fly RC plane that bridges the gap between beginner-friendly technology and expert-level aerobatic capability.
Key Features
- Officially Licensed Aviat Aircraft Company Scale Replica — This aircraft is an officially licensed replica of the iconic Aviat Pitts S-1S aerobatic design, ensuring authentic proportions and the genuine character of one of aviation's most celebrated aerobatic biplanes. The factory-finished trim scheme in red and white captures the classic aesthetics of competition Pitts aircraft.
- Exclusive AS3X Stabilisation Technology — The integrated AS3X (Artificial Stabilization–3-aXis) system works behind the scenes to smooth out the effects of wind and turbulence, delivering a locked-in feel that makes the ultra-micro aircraft seem like a much larger, expertly tuned machine. This exclusive Spektrum technology transforms how the aircraft responds to your control inputs.
- Optional-Use SAFE Select Flight Envelope Protection — SAFE Select is built into the Spektrum receiver and can be easily toggled on or off using any transmitter switch assigned to channel 5 (the Gear channel by default on most Spektrum computer transmitters). When enabled, SAFE Select provides pitch and bank angle limits to prevent excessive climb or dive angles and full roll, plus automatic self-levelling that instantly returns the aircraft to level flight when the sticks are released. This makes the UMX Pitts S-1S exceptionally easy to fly, even for pilots learning aerobatic techniques.
- 2S and 3S Compatible Brushless Power System — The factory-installed brushless outrunner motor and ESC are compatible with both 2S 7.4V and 3S 11.1V LiPo batteries in the 280–300mAh capacity range. The 2S configuration delivers performance similar to the original model, whilst 3S batteries unlock more speed and unlimited vertical aerobatic capability for experienced pilots.
- Real-Time Flight Battery Voltage Telemetry — The integrated control unit includes an ESC and Spektrum receiver that provides real-time battery voltage telemetry to compatible Spektrum AirWare-equipped transmitters such as the DX6e, NX6, iX20, DX6 G2/G3, DX8 G2, DX9, NX8, NX10, iX12, and iX20. This allows you to monitor your battery status in real-time during flight.
- Spektrum 2.4GHz DSMX Technology — The factory-installed Spektrum receiver features industry-leading 2.4GHz DSMX digital spread spectrum technology, providing full-range control and compatibility with Spektrum DSMX and DSM2 transmitters. The system requires a minimum of a 5+ channel transmitter for complete functionality.
- Completely Factory-Assembled Ready-to-Fly Design — This Bind-N-Fly Basic model arrives 100% factory-assembled with the brushless motor, ESC, Spektrum receiver, and four linear servos already installed. Simply bind the receiver to your compatible Spektrum transmitter and you can be flying within minutes—no building, soldering, or configuration required.
- Durable Advanced EPS Foam Airframe — The aircraft is constructed from advanced EPS (expanded polystyrene) foam material that delivers a lightweight yet durable airframe capable of withstanding the rigours of regular aerobatic flying. Should you damage any airframe parts, a comprehensive line of replacement and spare parts is readily available from authorised retailers.
- Ultra-Micro Size Perfect for Any Location — With a wingspan of just 434mm (17.09 inches) and length of 393mm (15.47 inches), the UMX Pitts S-1S is genuinely ultra-micro in size. This makes it perfect for flying indoors in gymnasiums and similar large enclosed spaces, or outdoors in yards, parks, sports fields, and other suitable open areas. The compact size does not compromise aerobatic capability.
Technical Performance
The E-flite UMX Pitts S-1S delivers impressive performance from its carefully engineered brushless power system. The aircraft weighs just 94 grams without battery, or 133 grams with a 3S 300mAh battery installed, making it genuinely ultra-micro whilst maintaining the structural integrity needed for sustained aerobatic flight. The brushless outrunner motor is paired with a brushless ESC and is compatible with both 2S 7.4V and 3S 11.1V LiPo batteries in the 280–300mAh capacity range, giving you complete flexibility in choosing the power level that matches your flying style. The aircraft spans 434 millimetres from wingtip to wingtip and measures 393 millimetres in length, making it compact enough to transport easily yet large enough to provide genuine aerobatic capability. The factory-finished EPS foam airframe combines lightness with durability, and the aircraft includes four linear servos for precise control of elevator, rudder, and aileron functions. The integrated Spektrum control unit includes both the ESC and receiver in a single compact package, reducing weight and complexity whilst maintaining the reliability that Spektrum systems are renowned for. Whether you're flying 2S for smooth, manageable performance or 3S for speed and unlimited vertical aerobatic capability, the UMX Pitts S-1S responds with the locked-in precision that AS3X stabilisation provides, delivering a flying experience that punches well above its weight class.
What's in the Box
- E-flite UMX Pitts S-1S aircraft (fully factory-assembled)
- Brushless outrunner motor (factory-installed)
- Brushless ESC (factory-installed)
- Spektrum 2.4GHz DSMX receiver with AS3X and SAFE Select (factory-installed)
- Four linear servos (factory-installed)
- Product manual
What You Need to Complete
- Full-range 5+ channel Spektrum DSMX or DSM2 compatible transmitter (such as the Spektrum DXS)
- 2S 7.4V or 3S 11.1V 280–300mAh LiPo battery with JST-RCY connector (note: a suitable JST-RCY to JST-PH adapter may be required for some 2S battery packs)
- Compatible LiPo battery charger
Frequently Asked Questions
- Is the E-flite UMX Pitts S-1S suitable for beginners learning to fly RC aircraft? — Yes, the UMX Pitts S-1S is designed to be the easiest-to-fly Pitts model ever created. The optional-use SAFE Select technology is specifically designed for new pilots and provides pitch and bank angle limits plus automatic self-levelling. When SAFE Select is enabled, the aircraft will automatically level itself when you release the control sticks, making it much easier to learn control inputs. The exclusive AS3X stabilisation technology also helps smooth out wind and turbulence effects, giving the small aircraft a locked-in feel that inspires confidence. However, the manufacturer lists the skill level as Level 2, which suggests some basic RC flying experience is beneficial, though the technology does make it very accessible.
- What battery does the E-flite UMX Pitts S-1S require? — The aircraft is compatible with 2S 7.4V or 3S 11.1V LiPo batteries in the 280–300mAh capacity range with a JST-RCY connector. The 2S configuration delivers performance similar to the original UMX Pitts model, whilst 3S batteries provide more speed and unlimited vertical aerobatic capability. Note that some 2S battery packs may require a JST-RCY to JST-PH adapter (such as the Spektrum SPMXCA327) to fit properly.
- What transmitter do I need for the UMX Pitts S-1S? — You need a full-range 5+ channel Spektrum DSMX or DSM2 compatible transmitter. The aircraft is suggested to be compatible with the Spektrum DXS transmitter that comes with many RTF models. Other compatible transmitters include the DX6e, NX6, iX20, DX6 G2/G3, DX8 G2, DX9, NX8, NX10, iX12, and iX20. Any 5+ channel transmitter using DSMX or DSM2 protocols should work with this aircraft.
- Can I fly the UMX Pitts S-1S indoors? — Yes, the ultra-micro size makes it ideal for indoor flying in gymnasiums and other large enclosed spaces. It can also be flown outdoors in parks, sports fields, yards, and suitable open areas. The small size and light weight make it versatile for various flying locations.
- How long does assembly take for the UMX Pitts S-1S? — No assembly is required. This is a Bind-N-Fly Basic model that arrives 100% factory-assembled. The motor, ESC, receiver, and servos are all pre-installed. You simply need to bind the receiver to your transmitter and you can be flying within minutes.
- Does the UMX Pitts S-1S include everything I need to fly? — The aircraft itself is complete and ready to bind, but you will need to provide a compatible transmitter, a suitable LiPo battery, and a battery charger to complete the setup. These items are sold separately and are not included in the box.
- What makes the UMX Pitts S-1S different from other ultra-micro RC planes? — The UMX Pitts S-1S is an officially licensed replica of the iconic Aviat Pitts S-1S aerobatic aircraft, combining authentic design with exclusive Spektrum AS3X stabilisation and optional SAFE Select protection. The 2S and 3S compatible power system provides flexibility that many competing ultra-micro models do not offer. The real-time battery voltage telemetry to compatible Spektrum transmitters is another advanced feature. Most importantly, the combination of professional-grade stabilisation technology with beginner-friendly SAFE Select flight envelope protection makes this aircraft accessible to new pilots whilst still capable enough for experienced aerobatic flyers.
- Is the UMX Pitts S-1S waterproof? — The source material does not specify waterproof ratings for the electronics or airframe. Whilst the EPS foam airframe can handle light moisture, it is recommended to avoid flying in rain or landing on water, as the electronics are not specified as waterproof. Standard RC care and dry storage practices should be followed.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the EFL UMX Pitts S-1S BNF Basic with AS3X and SAFE Select A-EFLU15250 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
