If you happen to’re in search of a micro FPV drone that may shoot gorgeous 4K video whereas remaining small, light-weight, and agile, the Flywoo Firefly18 1S is perhaps simply what you want. I’ve been flying this quad for a couple of days now, and right here’s my full overview based mostly on real-world flight expertise. Let’s break down what makes this sub-250g FPV drone so compelling—and the place it’d fall quick.
Be taught extra concerning the DJI O4 Air Unit and the perfect settings in our tutorial: https://oscarliang.com/how-to-setup-dji-o4-lite/
The place to Purchase
Get the Flywoo Firefly18 from these distributors:
Within the field it comes with the next equipment:
- HQ bi-blade 45mm propellers (2 units, whole of 8)
- A right-angle USB-C adapter (for simpler entry to the DJI O4 USB port)
- Screwdriver, varied spare screws, zip ties, and stickers
- TPU battery mounts for various battery sizes (1S 450mah, 750mah and 1000mah)
- An ND4 filter
Batteries aren’t included, get them right here (I like to recommend 1S 750mAh): https://oscarliang.com/product-8w9c
Get some spare propellers right here (HQ 45mm x2 w/1.5mm gap): https://oscarliang.com/product-8esr
Overview
The Firefly18 V3 is the most recent era of Flywoo’s 1S “Nano Child” sequence, and it comes outfitted with the DJI O4 Lite Air Unit for crisp, stabilized 4K video.
Flywoo gives two variants:
- Firefly16: 40mm (1.6-inch) props, 23,500KV motors
- Firefly18: 45mm (1.8-inch) props, 19,800KV motors
Each variations share virtually the identical parts, however the Firefly18 has barely bigger props with decrease KV motors, which provides you higher effectivity and longer flight instances—particularly necessary while you’re carrying the additional weight of the DJI O4 air unit. The dimensions distinction is minor however the efficiency acquire is noticeable, which is why I like to recommend the Firefly18.
Huge-Angle Lens: A Worthwhile Improve
On this overview, I’m utilizing Flywoo’s wide-angle lens for the DJI O4 Lite digicam, which is bought individually. This lens solves one of the widespread complaints with the O4 Lite—the slender subject of view. By growing the FOV to virtually match the O4 Professional (~155°), the flying expertise turns into considerably extra immersive and pure.
Try my overview of the wide-angle lens right here: https://oscarliang.com/flywoos-wide-angle-lens-dji-o4/
If you happen to resolve to not get the extensive angle lens, that’s completely superb too—Flywoo features a round ND4 filter within the field, which not solely helps with publicity in vibrant circumstances but additionally acts as a protecting cowl for the digicam lens.
Nearer Look
The Firefly18 is sort of as small as a tiny whoop, however because of its open-prop design, bigger motors, and 45mm propellers, it delivers considerably extra energy and pace. This makes it a way more succesful platform for carrying the DJI O4 system in out of doors environments.
One of many recognized challenges with working the DJI O4 on 1S builds is voltage—video feed can develop into unstable when battery voltage drops under 3.7V. Flywoo addresses this by together with a 5V voltage regulator (exterior BEC), which delivers constant energy to the air unit. In my testing, it held up nicely even when battery voltage dipped under 3V, sustaining a secure video feed all through.
That stated, the extra parts—the wide-angle lens and exterior BEC—all add weight. By 1S requirements, this quad isn’t light-weight, tipping the scales at round 56g with a 1S 750mAh battery.
The motors are related to the flight controller through connectors slightly than direct soldering. This does add a little bit of weight, and I do marvel if direct soldering would supply a small efficiency acquire (much less resistance and weight). However from a upkeep perspective, connectors make motor replacements a lot simpler.
The construct may be very clear and of first rate high quality. USB ports for each the flight controller and DJI O4 are straightforward to entry—no awkward angles or disassembly required.
The digicam tender mounting appears to be optimum—no seen jello within the footage. Stabilization through Rocksteady or Gyroflow works nice too, making the video easy and cinematic.
Battery holders are 3D-printed in versatile TPU and they’re swappable utilizing a twist-lock mechanism. Flywoo contains holders for 1S 450mAh, 750mAh, and 1000mAh batteries, so you’ll be able to simply swap between completely different battery sizes.
Detachable propeller guards are additionally included, which is a pleasant contact for learners or when flying in tighter environments.
Video Efficiency with DJI O4 & Huge-Angle Lens
This construct actually shines for one key purpose: 4K stabilized video with the DJI O4 Air Unit. With Flywoo’s wide-angle lens put in, the sector of view jumps from the inventory 117° to round 155°, virtually matching the DJI O4 Professional. That wider view makes an enormous distinction, particularly for cinematic flying or proximity cruising.
There’s a draw back—the perimeters of the wide-angle lens are seen within the goggles and HD recording, particularly when utilizing 4:3 Huge mode. Nonetheless, in case you allow Rocksteady stabilization, or course of the uncooked footage by way of Gyroflow, the picture will get cropped simply sufficient to remove these black corners (you may need to scale back FOV to one thing like 0.9). Try my tutorial on the right way to use Gyroflow: https://oscarliang.com/gyroflow/
Picture high quality takes a small hit. There’s a little bit of softness added to the picture and barely extra lens flare when flying towards the solar. That’s anticipated, because the picture has to undergo two further lenses. Nonetheless, the general video high quality stays wonderful—particularly contemplating the sub-250g class.
The wide-angle lens provides about 3.5g, which is manageable on the Firefly18 and doesn’t considerably impression flight efficiency.
The DJI O4 digicam is mounted utilizing Flywoo’s 18mm “cam shell” adapter, which is compact and useful. However it makes use of a friction-fit design, that means the lens adapter can get free throughout crashes. Whereas it’s not a dealbreaker, it’s one thing to concentrate on—particularly in case you’re flying aggressively or crashing usually.
Flight Efficiency
With its 45mm bi-blade props and upgraded 1002 19,800KV motors, the Flywoo Firefly18 gives strong energy for a 1S micro drone. In comparison with the older Firefly16, the Firefly18 delivers noticeably higher flight time and a bit extra punch within the air.
It’s impressively quiet—about as silent as a tiny whoop—which makes it ultimate for flying in small parks or neighborhoods with out drawing an excessive amount of consideration.
For a 1S micro drone, it’s surprisingly quick. Whereas it’d wrestle to get well shortly from dives or inverted maneuvers, it could actually nonetheless pull off many freestyle methods. It’s not a freestyle beast, but it surely’s extra succesful than you’d suppose for its dimension.
The tune out of the field is superb. It feels very locked in and responsive. I even examined it in 18mph winds, and it held up impressively nicely. There was a little bit of shakiness right here and there as a result of wind, however total, it exceeded my expectations.
I’ve had a number of crashes throughout testing, and the Firefly18 survived all of them. The sunshine weight of the quad undoubtedly helps in sturdiness. Nonetheless, discovering it after a crash in tall grass is a ache. It doesn’t include a beeper, and the motors are extraordinarily quiet.
I examined three battery sizes, and right here’s how they carried out:
- 450mAh 1S: Lightest and most agile. Nice for brief freestyle/racing periods. Anticipate 2.5 to three minutes of flight time. Hovers round 34% throttle.
- 750mAh 1S: My favourite. Balanced efficiency with 5 minutes of flight time and sufficient energy for a lot of freestyle methods. Hovers round 36%.
- 1000mAh 1S: Longest flight time (~7 minutes), but it surely feels sluggish and heavy. Greatest for easy cruising and exploring. Hovers round 38%.
Specs
- Body: Firefly18 1S Nano Child V3 (O4 model)
- Flight Controller: GOKU F405 HD 1S AIO (5A),
- With ICM42688 Gyro and 8MB reminiscence for Blackbox
- Receiver: Constructed-in ExpressLRS 2.4GHz
- VTX/FPV Digicam: DJI O4 Air Unit
- Propellers: HQ 45mmx2 bi-blade
- Motors: ROBO 1002 19800KV
- Battery Connector: A30 (additionally appropriate with BT2.0 batteries)
- Weight (with out battery): ~39g (with wide-angle lens)
How one can Setup
The FC goal is FLYWOOF405S_AIO, and it got here loaded with Betaflight 4.5.1. The unique CLI diff will be discovered right here.
ESC firmware is Bluejay, 0.19, 48kHz (O-H-5).
Onboard ExpressLRS receiver: Flywoo EL24E 2.4GHz RX (Firmware Rev. merge CE_LBT). It binds with ELRS V3 firmware on the TX.
Propellers mounting: motors are reversed route.
To setup for first flight, I did the next:
- Bind ELRS Receiver: Plug within the USB cable to the flight controller, the onboard ELRS receiver will go into WiFi mode after ready a minute. Be part of the WiFi community “ExpressLRS_RX”, go to 10.0.0.10 in your browser, and enter bind phrase. And binding was carried out. For extra element: https://oscarliang.com/bind-expresslrs-receivers/#Technique-3-Getting into-Bind-Phrase-in-Net-UI
- Pair O4 to Goggles 3:
- Modes tab in Betaflight Configurator: Configure the switches for arming, angle mode, and turtle mode.
- OSD tab: choose HD Video Format, and cargo my CLI settings: https://oscarliang.com/betaflight-osd/#HD-without-GPS. Disable core temperature, altitude,
- Energy tab in Betaflight Configurator: Set the minimal cell voltage to three.2V and the warning to three.4V (land round 3.3V). Set max voltage to 4.4V.
- PID Tuning tab: set your personal charges, right here’s my charges: https://oscarliang.com/charges/#My-Charges
Conclusion
The Flywoo Firefly18 Nano Child V3 with DJI O4 with wide-angle lens is a thoughtfully designed micro drone for cinematic FPV. It’s not the lightest or most aggressive performer in its class, but when your precedence is stabilized 4K video from a 1S quad that may nonetheless fly nicely, it’s exhausting to beat this setup.
The wide-angle lens really transforms the DJI O4 expertise, making this drone a fair higher worth for content material creators and cinematic flyers. Simply be sure you choose your battery dimension based mostly on the way you wish to fly.
Purchase the Flywoo Firefly18 from these distributors:
Purchase 1S 750mAh: https://oscarliang.com/product-8w9c
Purchase Spare Propellers: https://oscarliang.com/product-8esr
Purchase the Huge-Angle Lens: https://oscarliang.com/product-rfff
Who can purchase this quad?
- If you happen to’re a cinematic pilot in search of high-quality stabilized video in a tiny kind issue—this can be a nice selection (important draw back is you’ll be able to see the props within the footage). If you would like the very best picture high quality from a tiny quad, try the Eagle 2: https://oscarliang.com/ymzfpv-eagle2-o4-pro/
- If you happen to’re a newbie who needs to begin flying digital with out constructing your personal quad, this can be a strong plug-and-play choice.
- If you would like a small and quiet quad to fly in your native park and keep away from consideration, this can be a nice selection.
