Review: Flywoo Firefly 1S Nano Baby Quad

by Oscar
Flywoo Firefly 1s Nano Baby Quad Palm Size

Wanna get a tiny whoop but without the ducts? Check out the Flywoo Firefly 1S Nano Baby Quad, not only it’s faster and more powerful, it’s also super efficient giving you 8+ minutes of flight time on a single battery!

Where To Buy?

There are 3 options when it comes to receiver: SPI Frsky (D8/D16), Crossfire and 2.4GHz ExpressLRS.

Flywoo Firefly 1s Nano Baby Quad Unbox AccessoriesNote that the lipo battery is not included. Flywoo recommend 1S 450mAh and they send me one for testing. Check out what batteries I have tested and recommend here.

Specs of Flywoo Firefly 1S Nano Baby Quad

  • FC: GOKU Versatile F4 5-IN-1 1S AIO FC
  • 250mW VTX
  • Optional Receiver: Frsky / ExpressLRS 2.4G / TBS Crossfire
  • Motor: ROBO 0802.4 16500KV or 19500KV
  • Gemfan 40mm bi-blade propellers (1mm shaft)
  • Camera : Flywoo 1S Nano Camera
  • 1S LiPo Battery
  • Weight: 21.9g (without battery), 34.7g (with 1S 450mAh)

Here let me introduce you the flight controller and receiver used in the Nano Baby Quad.

Flywoo Versatile F4 1S 5in1 FC

Flywoo Versatile F4 1s 5in1 Fc Unbox Accessories

Get this FC separately here:


  • Input Voltage: 1S LiPo
  • BetaFlight FC Firmware: FLYWOOF411FR
  • MCU: STM32F411CEU6
  • Gyro: MPU6000
  • Built-in BetaFlight OSD
  • 2 UARTs (Uart2 is used for VTx control, so actually just one spare UART)
  • Current Sensor: yes
  • Buzzer pads: yes
  • 5Ax4 BLHeli_S ESC
  • Built-in VTX:
    • Switchable VTX Output Power: 25mW / 100 / 250mW
    • VTX Control: ImmersionRC Tramp
  • Stack Size: 25x25mm
  • Dimensions: 35x35xmm
  • Weight: 4.2g

Flywoo Versatile F4 1s 5in1 Fc Close Up Bottom Flywoo Versatile F4 1s 5in1 Fc Close Up TopCool features of this AIO board:

  • designed for tiny whoops and tiny 1S quads
  • motors can be soldered directly to the board, it doesn’t use connectors
  • it has built-in RX, however the RX is only SPI Frsky (D8/D16 compatible). You can still hook up an external RX to this FC as it has a spare UART, such as Crossfire or ExpressLRS.
  • it has a built-in VTX with 250mW output power
  • Antennas for both RX and VTX are removable – there are two IPEX connectors, the smaller one is for RX (Frsky SPI) and the bigger one for VTX antenna. If you are not using the Frsky RX, you can leave that antenna disconnected
  • the solder pads are small but nicely spaced out, so it should be easier to work with than most other whoop FC out there

Flywoo 2.4GHz ExpressLRS EL24E RX

Product Pages:

Flywoo 2.4ghz Expresslrs Elrs El24e Rx Antenna Flywoo 2.4ghz Expresslrs Elrs El24e Rx Bottom Pinout

Cool features of Flywoo’s own ExpressLRS RX

  • it’s almost the same size and weight as the Happymodel EP2, which is super tiny!
  • it has built-in WiFi for firmware flashing
  • Device Category is DIY 2.4GHz, Device is DIY 2400 RX ESP8285 SX1280.

You can learn about ExpressLRS here.

Procedure of flashing and binding are exactly the same as all other ExpressLRS receivers. You can learn how to do it in my tutorial.

Closer Look at the Nano Baby Quad

It’s basically a tiny whoop without those prop guards.

Flywoo Firefly 1s Nano Baby Quad Size Compare Tiny Whoop

Although the difference is not huge, it actually benefits flight performance tremendously. The Flywoo Nano Baby Quad is slightly more powerful than a tiny whoop, and more importantly, it’s super efficient. I am getting over 7 minutes of long flight time on 1S 450mah, and almost 10 minutes on 1S 650mah!


Flywoo Firefly 1s Nano Baby Quad Close Up Fpv Camera

It comes with ExpressLRS receiver (2.4GHz), so you can actually bind it to any 2.4GHz ExpressLRS TX module (even different brands), including the Happymodel and BetaFPV .

Flywoo Firefly 1s Nano Baby Quad Close Up FcHowever the biggest bottle neck is probably the PH2.0 battery connector that has a bit higher resistance. It flies great  as it is but both performance and longevity will definitely benefit from something more robust. I would probably replace it with something like the BT2.0 connector, since I also have quite a few LiPo with that type of connectors anyway.

Flywoo Firefly 1s Nano Baby Quad Bottom Battery Holder

The frame is a deadcat design, which means the front motors are further apart than the rear motors, so you don’t get the props in the camera’s view.

The battery holder is 3D printed in TPU and it’s a perfect fit for the battery they sent me (the 1S 450mah). However it’s quite thin, and can wear out over time. Anyway I think you can replace it with just a rubber band.

Flywoo Firefly 1s Nano Baby Quad Palm Size

The Flywoo Firefly Nano Baby Quad (what a mouthful) is absolutely tiny and quiet, perfect for flying in small parks. But beware it’s still just like a tiny whoop, it doesn’t handle the wind too well.

I think this quad is designed around flight time and efficiency, hence the use of two-blade props. Those props have 1mm holes , so make sure you get the right ones when buying spare. I do recommend getting some spare props as they can fly away in crashes, the fit on motor shaft isn’t super tight.

Get spare props here:

The bottom plate is quite thin, at 1.5mm. It does flex a bit when you try to bend the arms but it doesn’t seem to affect flight performance since it’s so light. It’s holding up well to a few crashes I had with trees and landed on grass.

How To Setup

FC Board Name: FLYWOOF411FR, pre-flashed with Betaflight 4.2.0. You can find the original CLI dump here.

Cool thing about this quad is that the ESC’s are already flashed with BLHeli_S 16.80. I am not sure exactly which custom firmware they are using, but RPM filter is enabled out of the box, and possibly 48KHz too.

To setup it up, first of all, bind the quad to your transmitter. Because I got the ELRS receiver, so I had to flash the RX to the latest version first with my binding phrase. You can learn how to do this in my tutorial.

Device Category is DIY 2.4GHz, Device is DIY 2400 RX ESP8285 SX1280. For some reason when I flashed it via WiFi, it didn’t want to bind to my TX although it came back with “flashing successful”. In the end I had to flash it via Betaflight Passthrough for it to work.

Once it’s bound and working (confirm in Receiver tab in Betaflight Configurator that the channels are responding to your sticks), you should make a few config adjustments.

In the Configuration tab:

  • change PID Loop Frequency to 4KHz (it was on 2Khz originally)
  • change ESC Protocol to DShot300 (from DShot600)
  • disable Motor_Stop
  • change motor poles from 14 to 12 (tiny motors have 12 poles, and 14 probably won’t work well for RPM filter)
  • change arming angle from 25 to 180 (so you can arm the quad even when it’s on unlevel surface)
  • Enable RX_SET under DShot Beacon, as it doesn’t have a buzzer, this will help you find it after you crash

In Modes tab, assign switches to Arm, Beeper and Flip Over After Crash.

In OSD, choose whatever elements you prefer on the screen.

That’s it! We are ready for first flight :)

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mike 17th October 2021 - 2:51 am

how do you flash it via Betaflight Passthrough ?

Erik 13th October 2021 - 3:32 am

Hi Oscar, thanks for the great review and information about this little flyer. I got mine recently with the built in SPI receiver and on the first flight damaged my antenna. What connector is that little IPEX? Is it 3?

Sascha 22nd September 2021 - 6:54 pm

Funny, I bought one on the day of the first post.
They have problems producing them fast enouh as they get bought, as it seems, my order is postponed.

George 17th September 2021 - 11:18 pm

Which motors did you recieve with your quad. I see they also have a 19000kv offering. I ordered from BG but they did not ask what KV I wanted. I do hope it is the lower KV. On another note your articles on the ExpressLRS 2.4 are fantastic and enabled this older guy to set it up. I am loving the new system.

Oscar 19th September 2021 - 1:39 pm

I have the 19500KV version, yes it’s strange they don’t offer KV option in product page.