Q: Why Nobody Can Decipher Flywoo's GOKU Lineup (And How We'd Actually Pick)

Quick Answer

Flywoo's GOKU range spans everything from a 4g 1S whoop AIO to a 480 MHz H743 30x30 stack pulling 55A on 6S. We stock over thirty GOKU boards and the naming is genuinely confusing, so here's the full lineup broken down by mounting size, MCU, and cell count — with specific picks for whoop, micro, and freestyle builds.

The GOKU Lineup at a Glance

GOKU is Flywoo's in-house electronics brand. It covers flight controllers, AIOs, 4-in-1 ESCs, and GPS modules across four mounting footprints: 16x16, 20x20, 25x25, and 30x30. The naming follows a loose pattern — the chip (F405, F722, H743) tells you processing power, and the suffix (HD, ERVT, PRO, Nano) tells you the target use case. Where it falls down is that Flywoo reuses the GOKU name for wildly different boards, so two "GOKU F405" products can be a 4g whoop AIO or a 30x30 stack. Mounting pattern is the first thing to filter on.

If you want the background on why the chip matters, our F4 vs F7 vs H7 guide covers the processing differences. The short version: F405 is fine for Betaflight on micros, F722 adds more UARTs and faster processing, and H743 is overkill today but future-proofs you for whatever Betaflight 5.x demands. For the AIO-vs-stack trade-off, see our AIO vs Stack guide — the short version is that AIOs win under 20x20, stacks win at 30x30, and 20x20 is genuinely a toss-up.

1S Tiny Whoop AIOs

This is where GOKU started and it's still the strongest part of the range. The GOKU F405 HD 1S 5A AIO V2 is the one we recommend most often. It's a true all-in-one: F405 FC, 5A ESC, ELRS 2.4G receiver, and pads for DJI O4, Walksnail, or HDZero — all on a 2.6g board. At £36.49 it's the cheapest way to put HD into a 65-75mm whoop.

If you're pushing larger 75mm props on 1S, step up to the GOKU F405 HD 1S 12A AIO Plug & Play. The 12A ESCs handle aggressive 1S brushless motors without sagging, and it ships with the O4 harness pre-attached — no soldering. It's our default pick for a Firefly 16 or Flylens 75 build.

The GOKU F405 ERVT 1S 5A is the older 5-in-1 design with a built-in 400mW analog VTX. It's still relevant for analog whoop racing where you want onboard video without an external VTX, but for HD builds the V2 AIOs make more sense. There's also a newer ELRS 2.4G + DJI O4 bundle variant of the 5A AIO that ships with the receiver pre-flown and the O4 pigtail in the box.

1-2S Micro AIOs (The Sweet Spot)

For 2S micros running an O3 or O4 Air Unit, the GOKU F405 HD 1-2S 12A ELRS AIO V2 (ICM42688) is the board to beat. It's a 5g AIO with 12A ESCs, a 9V 2A BEC that feeds the O3 properly, and an integrated ELRS 2.4G receiver. The ICM42688 version is what we'd pick — the newer gyro filters noise better than the MPU6000 variant, which matters on a 2S rig where motor noise is significant.

Both IMU versions sit in the £54-60 range. The MPU6000 variant is marginally cheaper and still flies well if you're on a budget, but in our experience the ICM42688 holds tune more consistently on 2S builds that see prop wash.

16x16 Nano Stacks (Toothpick Territory)

The GOKU GN405 Nano HD V3 is the 16x16 entry — designed for 2-4S toothpicks and micro long-range. The FC-only GN405 Nano HD FC V3 at £27.99 is one of the cheapest F405 boards with built-in ELRS we sell. Step up to the 35A stack version and you've got a 4S-capable toothpick stack with headroom for aggressive 1404 or 1504 motors.

The TCXO ELRS receiver matters here — it's a temperature-compensated crystal oscillator that holds frequency better than the standard ELRS receiver across temperature swings. On a long-range toothpick flying in UK winter, that's the difference between a clean link and a failsafe at 500m.

20x20 Stacks: F722 vs H743 Mini

20x20 is where GOKU gets interesting for 3-4 inch freestyle. The GOKU F722 PRO Mini V2 45A Stack at £57.49 is the value pick. STM32F722 at 216 MHz, 45A 32-bit ESC, and plug-and-play headers for most peripherals. For 3-4 inch freestyle on 4S, this is plenty of stack.

If you want H743 processing on 20x20, the GOKU H743 PRO Mini 45A Stack at £62.49 is the step-up. The 480 MHz H743 is genuinely faster than the F722 — relevant if you're running Betaflight 4.6 with bidirectional DShot and heavy filtering, or if you plan to run INAV. It also ships plug-and-play ready for the DJI O4 Air Unit, which removes the fiddly soldering on the O4 pads.

Both stacks work on 4-6S. The H743 version is what we'd put in a 4S 4-inch cinewhoop carrying an O4 — the extra processing headroom and P&P harness justify the £5 over the F722.

30x30 Flagship Stacks

For 5-inch and larger, the GOKU PRO V2 30x30 range is the flagship. The F722 PRO V2 55A AM32 Stack at £59.98 is the mainstream pick — AM32 ESC firmware (the modern replacement for BLHeli_32), 55A burst, and a proven F722 FC. For most 5-inch freestyle and race builds on 6S, this is the stack.

For pilots who want maximum headroom, the GOKU H743 PRO 55A Stack at £66.90 is the top of the range. H743 at 480 MHz, 55A ESC, plug-and-play O4 harness, and enough UARTs to run GPS, VTX telemetry, and a Compass without stacking receivers on the same port. It's the board we'd pick for a 5-inch build running an O4 Air Unit and a GM10 Pro GPS for return-to-home. Browse all our flight controller stacks for alternatives from other brands.

GM10 GPS Modules

The GOKU GPS range uses the M10050 GNSS chip and supports GPS, GLONASS, Galileo, BeiDou, and QZSS. The GM10 Pro V3 with compass at £17.90 is the one to get — the compass matters for INAV return-to-home and fixed-wing work. The non-compass GM10 Mini V3 is cheaper and lighter for pure position logging on a quad.

One firmware note: the M10050 chip requires Betaflight 4.3.0+ or INAV 5.0.0+. If you're flying an older configurator, the Ublox protocol won't initialise. This is the most common support question we get on these modules.

Our Picks

Budget HD whoop: GOKU F405 HD 1S 5A AIO V2 at £36.49. Cheapest path to HD whoop flying with ELRS built in.

Sweet spot (2S micro HD): GOKU F405 HD 1-2S 12A ELRS AIO V2 (ICM42688) at £54.95. The O3-ready 9V BEC and solid 12A ESCs make this the default 2S HD micro board.

No-compromise 5-inch: GOKU H743 PRO 55A Stack at £66.90. H743, 55A, plug-and-play O4. Everything you need for a flagship build.

Specialist (long-range micro): GOKU GN405 Nano HD 35A Stack V3 at £50.95. The TCXO ELRS receiver and 4S capability make it the pick for sub-250g long-range.

See all GOKU boards in our flight controllers collection or browse the FCs & autopilots range for alternatives from SpeedyBee, GEPRC, and iFlight. Our DJI O4 Air Unit guide covers the VTX side of the HD equation.

FAQ

Q: What's the difference between GOKU F405 HD V2 and the older ERVT?

The V2 is HD-focused with pads for DJI O4, Walksnail, and HDZero — no onboard VTX. The ERVT has a built-in 400mW 5.8GHz analog VTX. If you're flying HD, the V2. If you're flying analog whoop racing, the ERVT.

Q: Do GOKU AIOs work with DJI O3 Air Unit?

The 1-2S 12A AIO V2 has a 9V 2A BEC that powers the O3 properly. The 1S AIOs are designed for O4 (lower power draw). Don't try to run an O3 on a 1S AIO — the BEC can't supply the current.

Q: Which GOKU stack for a 6S 5-inch freestyle build?

The F722 PRO V2 55A AM32 Stack for value, the H743 PRO 55A if you want O4 plug-and-play and more processing headroom. Both handle 6S without issue.

Q: ICM42688 or MPU6000 gyro — which is better?

ICM42688. It's the newer part, filters motor noise better, and holds tune more consistently on builds that see prop wash. The MPU6000 variant exists for compatibility with older Betaflight targets; there's no reason to pick it on a new build.

Q: Can I use a GOKU board with INAV?

Yes. The H743 boards in particular are well-suited to INAV — the processing headroom and UART count matter for GPS missions. Pair with the GM10 Pro GPS for compass-assisted return-to-home. Make sure you flash the INAV target rather than the Betaflight target — they're not interchangeable.