Flywoo GOKU GN405 Nano HD 20A Stack V3 W/ TXCO ELRS 2.4g
About Flywoo GOKU GN405 Nano HD 20A Stack:
The Flywoo F405 NANO has been completely upgraded! We have further minimized and integrated the FC layout based on the original design. The new Flywoo GOKU GN405 Nano FC V3 w ELRS 2.4g is compact and features a USB-C universal port that is compatible with current mainstream data cables. It also supports the DJI O3 interface, allowing compatibility with high-quality digital transmission modules. Additionally, it has a complete set of six UART ports. Importantly, this flight controller is equipped with a TCXO ELRS high-precision receiver, making it an ideal solution for space-saving in micro drones. This flight controller is compatible with both QUAD and HEX drones, and users can switch between different ESC models. The latest three ESC models include: the 20A (QUAD) plug-and-play ESC, the 20A (HEX) plug-and-play ESC, and the high-performance 35A (QUAD) ESC. These options meet your compatibility needs for different drones, ensuring you have fun during your flights!
Highlights：
● 16x16 mounting holes with a compact design
● Built-in TCXO ELRS receiver
● Direct plug-in for DJI O3\O4 Air Unit
● FC/ESC pin header interface, compatible with QUAD/HEX
Bundle and save up to $4.97 on gear — upgrade your setup for less.
MEPS SZ1507.5 Brushless Motor for 3-4 inch FPV Drone 2680KV/3800KV
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MEPS SZ3046 Cinewhoop Propeller for 3 inch FPV Lightweight
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Top highlights
Compact and Space-Saving Design: The Flywoo GOKU GN405 Nano FC V3 features a compact layout with 16x16 mounting holes, perfect for micro drone builds.
Plug and Play: Compatible with O3 air unit, GPS, Camera, Analog VTX, and Receiver without the need for soldering.
Built-in TCXO ELRS Receiver: Equipped with a high-precision TCXO ELRS receiver for improved range and performance in your drone flights.
USB-C Port Compatibility: Features a universal USB-C port for easy connection with mainstream data cables, simplifying setup and use.
Supports DJI O3/O4 Air Unit: Directly compatible with DJI O3/O4 Air Units for high-quality digital video transmission, enhancing your FPV experience.
Versatile ESC Compatibility: Works with both QUAD and HEX drones and supports multiple ESC models, including 20A and 35A options, for flexible power setups.
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Upgrade Your Flight: Versatile ESC Options to Meet Every Need
The GOKU GN405 HD Stack V3 series offers three ESC options to match different drone sizes and performance needs, giving pilots maximum flexibility in build design.
The 20A QUAD version provides a balanced solution for lightweight 2–4S quad builds, combining efficiency and stability in a compact footprint — ideal for sub-250g and cinematic FPV drones.
The 20A HEX version features a built-in 6-in-1 BLHeli_S ESC, optimized for compact 2–4S hex builds. It supports multiple protocols, including PWM, Oneshot, Multishot, and DShot up to DShot600, delivering smooth and efficient power control in micro FPV setups.
The 35A QUAD version is designed for high-performance 2–6S freestyle drones, offering stronger current handling for aggressive flying while maintaining stable and responsive throttle output.
Integrated TCXO 2.4GHz ELRS for Stable and Reliable Control
The flight controller features a built-in TCXO (Temperature Compensated Crystal Oscillator) 2.4GHz ExpressLRS receiver, significantly improving signal accuracy and long-range stability. Compared to standard receivers, TCXO technology ensures more precise frequency control, reducing drift caused by temperature changes and improving overall link reliability. This integration also eliminates the need for external receiver wiring, resulting in a cleaner and more efficient build with fewer soldering points.
Clean Power Design for a Smoother Flying Experience
A well-optimized power supply system ensures stable voltage delivery across the stack, reducing electrical noise and improving overall flight performance. This clean power architecture helps minimize interference between components, resulting in smoother control response and more consistent flight behavior — especially important for HD digital FPV systems.
Advanced Features for Performance, Connectivity & HD FPV Integration
This flight controller combines powerful features to enhance tuning, usability, and flight experience. A 16MB Blackbox provides detailed flight data for precise PID tuning and performance analysis.
The USB-C interface ensures faster, more stable connections and easier setup compared to traditional ports.
It supports both quad and hex configurations, offering flexibility for different FPV builds. With native DJI O3 Air Unit compatibility, it enables plug-and-play HD video transmission with low latency and stable performance.
Specifications
Layout
Wiring Diagram
Reviews
A*********r
Verified
Super clean stack for micro builds. The built-in ELRS saves a lot of space and wiring. Installed it on a 3.5" freestyle and everything worked out of the box.
KV：GOKU GN405 Nano HD FC V3 w/ TCXO ELRS
N***********t
Verified
Perfect for my sub-250g long range build. The built-in ELRS saves so much space and weight. Had some questions and support replied pretty fast. Solid Flywoo quality.
KV：GOKU GN405 Nano HD 20A Stack V3
C**********V
Verified
good quality ESC, solder pads are small but manageable. power delivery is consistent and no desync issues.
KV：GOKU BS 20A ESC V3
Additional reviews after 9
days
had a minor crash and everything still works fine. build feels reliable.
M***************r
Verified
Perfect for my sub-250g long range build. The built-in ELRS saves so much space and weight. I had some questions about the TXCO version and support replied pretty fast. Solid quality as usual from Flywoo.
KV：GOKU GN405 Nano HD FC V3 w/ TCXO ELRS
Additional reviews after 35
days
Had a small issue after a nasty crash and reached out to support. They helped me troubleshoot and get back in the air. This nano stack is surprisingly tough and the built-in ELRS works flawlessly.
M***************r
Verified
Perfect for my sub-250g long range build. The built-in ELRS saves so much space and weight. I had some questions about the TXCO version and support replied pretty fast. Solid quality as usual from Flywoo.
KV：GOKU GN405 Nano HD 20A Stack V3
F*********K
Verified
arrived fast and packed really well. installed without too much trouble. works great out of the box, good power for a 20A setup.
KV：GOKU GN405 Nano HD 20A Stack V3
Additional reviews after 8
days
been flying for a week now, still stable and responsive. good experience with mepsking.
W*******h
Verified
lightweight and compact FC, fits perfectly in my nano frame. ELRS signal is strong and stable even indoors.
KV：GOKU GN405 Nano HD FC V3 w/ TCXO ELRS
Additional reviews after 10
days
still no issues after multiple flights, very reliable so far.
N*********r
Verified
Just finished my nano build and this stack looks super clean. Everything feels solid and well designed. Packaging was neat and no damage at all.
KV：GOKU GN405 Nano HD 20A Stack V3
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FAQFeel free to ask us any questions
Q: What is the Flywoo GOKU GN405 Nano HD 20A Stack V3 used for in FPV drones?
A: This nano FPV stack combines a lightweight F4 flight controller, 20A ESC, and built-in ELRS receiver, designed for compact HD FPV drones like toothpick and 3–4 inch builds.
Q: Is the GN405 Nano HD 20A stack suitable for 3 inch and 4 inch FPV drones?
A: Yes, it is optimized for 3–4 inch FPV builds, offering a balance of lightweight design and sufficient power for HD freestyle flying.
Q: What ESC performance does the 20A ESC provide in this nano FPV stack?
A: The 20A ESC supports 2–4S LiPo batteries and is suitable for smaller motors like 1404–2004, delivering efficient and stable performance.
Q: Does the Flywoo GN405 Nano stack support HD digital FPV systems like DJI O3?
A: Yes, it is designed for HD builds and supports digital VTX systems via dedicated UART and plug connections.
Q: Does this stack include a built-in ELRS receiver and how reliable is it?
A: Yes, it includes a built-in ELRS 2.4GHz receiver with TXCO for improved signal stability and reduced interference.
MEPS SZ1507.5 Brushless Motor for 3-4 inch FPV Drone 2680KV/3800KV2680KV*4pcs / Black$61.01 Save $4.59
MEPS SZ3046 Cinewhoop Propeller for 3 inch FPV LightweightClear Grey / 8PCS$3.42 Save $0.38
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