E-flite 4-Site 3D FF RC Airplane – The Ultimate Flat Foamy Biplane, Now at Aerobertics!
Revolutionizing Flat Foamy Flight
Back in the early 2000s, "flat foamy" models became incredibly popular due to their lightweight design and DIY-friendly nature. However, today's foam aircraft are mostly molded sport and scale models—meaning few can match the agility, responsiveness, and raw 3D performance that flat foam designs offer!
The E-flite® 4-Site 3D FF (Flat Foamy) 800mm is here to bring that performance back, combining classic F3P and UMX influences with modern innovation. It offers a biplane alternative to the best-selling Eratix 3D FF, with a shorter wingspan yet increased wing area for superior lift and lower wing loading.
At Aerobertics, we understand what pilots want—whether you're a seasoned expert in flat foam flying, an intermediate pilot eager to skip the complexity of scratch-building, or a beginner looking for a smooth introduction to 3D aerobatics. The 4-Site 3D FF is the easiest, most convenient, and best-value flat foamy biplane yet!
Why Choose the E-flite 4-Site 3D FF?
The 4-Site 3D FF offers all the extreme aerobatic and slow-flying characteristics of similar models without the hassle of lengthy builds. Unlike traditional flat foamies that require hours of gluing and taping, this model snaps and bolts together in minutes—you can assemble it in less time than it takes to charge a battery!
With its lightweight yet durable EPP airframe, factory-installed electronics, and cutting-edge Spektrum technology, this model is built to perform indoors and outdoors—perfect for flying in gymnasiums, backyards, or parks.
Equipped with an AR630+ receiver, AS3X+ stabilization, and optional SAFE Select, the 4-Site 3D FF is as smooth and stable as it is aggressive. Whether you're honing your skills or pushing the limits, this biplane is ready for action!
Key Features
- Fully factory-assembled airframe – no complex building required
- Lightweight and durable EPP construction for superior crash resistance
- Powerful Spektrum brushless outrunner motor paired with a 30A Avian Smart Lite ESC
- Three sub-micro metal-geared servos for precise, reliable control
- BNF Basic with AR630+ receiver featuring AS3X+ and optional SAFE Select
- Shorter wingspan than the Eratix 3D FF, but with more wing area for lower wing loading
- Compatible with 3S 850–1000mAh LiPo batteries for the perfect balance of power and flight time
- Versatile indoor and outdoor flight capabilities
Skill Level 2 – Some Experience Required
Skill Level 2 aircraft, like this one, are suitable for RC pilots with the experience and skills to assemble, set up, and fly similar class models. Although the 4-Site 3D FF is easier to assemble and fly than other flat foamy models, it's not a suitable first-ever RC aircraft for new pilots or a first-ever aerobatic/3D model for low-time RC pilots. You should have the experience and skills necessary to successfully fly aerobatic models like the E-flite UMX Ultrix, UMX Timber X, T-28 Trojan 1.1m, Sportix 1.1m, Timber X 1.2m, or other similar class models before attempting to fly the 4-Site 3D FF BNF Basic version.
Exclusive Technologies
This BNF Basic version has exclusive Spektrum AS3X+ and SAFE Select technologies. Enhanced AS3X+ technology works behind the scenes to smooth out the effects of wind and turbulence and deliver an even more locked-in feel than standard AS3X, which makes it seem like you're flying a much larger airplane. Optional-use SAFE Select offers pitch and bank angle limits and automatic self-leveling that can be turned on and off at the flip of a switch! If you don't want to enable the SAFE Select features, simply bind the receiver normally, and only AS3X+ will be active. The receiver is also loaded with a Smart Transmitter Model File that allows you to import all the settings for NX and iX series transmitters during the binding process to be ready to fly in less time than ever!
Smart Technology
The 4-Site 3D FF is equipped with an exclusive Spektrum Avian Smart Lite ESC that can provide a variety of real-time power system-related telemetry data including motor RPM, current, overall battery voltage, and more – with Smart and non-Smart batteries – via compatible receivers (including the AR630+) and Spektrum AirWare equipped transmitters (including the DX6e and DX8e, DX6 G2/3 and DX8 G2, the DX9, NX6 to 20, iX12 to 20 and others) while you fly.
Uniquely Capable
Like other flat foamy models, the 4-Site 3D FF is capable of slow cruising, smooth sport flying, basic aerobatics, and even aggressive 3D flying—all in the same flight! It offers a truly “mild to wild” flight experience that intermediate to experienced pilots will appreciate, whether indoors in gymnasiums or outdoors in yards, parks, sports fields, and beyond.
High Performance
The factory-installed brushless power system features a specially tuned Spektrum outrunner motor. This power system delivers plenty of thrust for unlimited vertical and 3D performance with 3S 850–1000mAh batteries!
Easy Assembly
Unlike other flat foamy models that are only available as kits without power and control components, the 4-Site 3D FF arrives mostly factory-assembled with the power system, servos, and receiver (BNF Basic version only) installed. All you need to do is finish some quick and easy final bolt/snap-together assembly—without the use of glue, tape, or special tools—and you'll be ready to fly in less time than it takes to charge a battery!
Durable Design
Three factory-installed digital servos with metal gears on all the control surfaces, plus construction with carbon fiber and composite-reinforced, high-density EPP, deliver a lightweight yet stiff and durable airframe. In the unfortunate event you damage any airframe parts or components and can't repair them, a full line of replacement/spare parts is readily available.
Specifications
- Wingspan: 31.5" (800 mm)
- Length: 36.1" (917 mm)
- Weight (without battery): 15.8oz (447g)
- Weight (with 3S 850mAh battery): 18.3oz (519g)
- Motor: 2408-1300Kv brushless outrunner
- ESC: 30A Spektrum Avian Smart Lite (installed)
- Servos: 3x Sub-Micro Digital, Metal-Geared (installed)
- Receiver: Spektrum AR630+ with AS3X+ and SAFE Select (installed)
- Propeller: 9 x 4.6
- Battery: 3S 11.1V 850–1000mAh LiPo with IC2 connector (sold separately)
- Transmitter: Full-range 4–5+ channel Spektrum DSMX®/DSM2® compatible (sold separately)
What's in the Box?
- (1) E-flite 4-Site 3D FF 800mm
- (1) Spektrum Brushless Outrunner Motor (installed)
- (1) Spektrum Avian 30-Amp Smart Lite Brushless ESC (installed)
- (3) Spektrum Sub-Micro Digital, Metal-Geared Servos (installed)
- (1) Spektrum AR630+ Receiver with AS3X+ and SAFE Select (installed)
- (1) Product Manual
Needed to Complete
- (1) Spektrum DSMX®/DSM2® 4–5+ channel transmitter
- (1) 3S 11.1V 850–1000mAh LiPo battery with IC2 connector (or a suitable adapter, sold separately)
- (1) Compatible LiPo charger (plus IC2 charge lead or adapter, sold separately)
Fly with Confidence – Only at Aerobertics
The E-flite 4-Site 3D FF is designed for pilots who want an ultra-responsive, high-performance 3D biplane without the complications of traditional flat foamies. Easy to assemble, thrilling to fly, and packed with modern technology, this model is a must-have for any aerobatic enthusiast.
At Aerobertics, we are committed to providing high-quality RC aircraft and components to help you achieve the best flying experience. Whether you're perfecting precision aerobatics, exploring 3D flight, or looking for a unique and fun RC model, the 4-Site 3D FF is an excellent addition to your collection.
Get yours today – only at Aerobertics.
