HGLRC Draknight O4 Review: Promising Micro FPV Drone Falls Short

Design and Build Quality

The HGLRC Draknight O4 makes a strong first impression with its clean, compact layout and a 93mm wheelbase that keeps total weight under 100 grams with a 2S 750mAh LiHV battery installed. Accessing the internal electronics is refreshingly straightforward — just four screws separate you from the flight stack beneath the top cage. The frame integrates a dedicated TPU mount for an optional GPS module, which hints at future-proofing. However, there is a notable catch: the flight controller only provides two UARTs, both already occupied by the ELRS receiver and the DJI O4 Air Unit, leaving no room for a proper GPS connection. So while this could loosely be compared to a GPS Drone in ambition, it does not fully deliver that capability out of the box. A rear TPU spoiler adds a sporty aesthetic, though its aerodynamic benefit is questionable. The onboard LED and buzzer board at the rear is a thoughtful touch — the LEDs are impressively bright and configurable via Betaflight, making nighttime orientation easy. The buzzer, unfortunately, is rather weak and would struggle to help you locate a downed quad in the field. Overall, the design language is appealing, but a few practical oversights temper the excitement.

Camera Setup and the Jello Problem

The Draknight O4 is built around the DJI O4 Air Unit, positioning it alongside other 4K camera drone platforms in the micro FPV segment. The camera soft-mounting system is genuinely creative — a TPU component isolates the camera cage from the main frame, theoretically absorbing vibrations before they reach the lens. In concept, this is exactly the kind of engineering you want to see on a 4K Drone targeting smooth cinematic footage. In practice, however, the execution falls short. The soft mount introduces rather than eliminates jello — that wavy, distorted artifact familiar to drone videographers. The flexible connection between the camera cage and the frame appears too loose, allowing unwanted movement that the mount cannot adequately dampen at typical flight speeds and motor frequencies. Installation of the O4 Air Unit also requires some effort. The unit does not ship pre-installed, no cable is included, and the flight controller lacks a plug-in connector, meaning users must solder directly to small pads on the FC board. Betaflight ports and OSD are pre-configured for the O4, which is helpful, but the overall setup experience feels less polished than the price point suggests. HGLRC should consider revising the soft-mount geometry and simplifying the O4 wiring process in a future hardware revision.

Flight Performance and Final Verdict

Powered by HGLRC SPECTER 1003 10000KV motors spinning GF2023 propellers, the Draknight O4 delivers lively, responsive performance typical of well-tuned 2-inch micro quads. The friction-fit propellers simplify maintenance, and the Bluejay ESC firmware contributes to smooth throttle response. The 16V 100uF capacitor on the power input provides some noise filtering, though a larger capacitor — ideally 220uF or above — would better serve the electrical system and potentially help reduce video noise artifacts. The bright rear LEDs add genuine utility for line-of-sight orientation, and the Betaflight configurability means pilots can customize behavior to suit their flying style. Where the Draknight O4 struggles most is in delivering on its core promise as a quality video platform. The jello issue is not a minor inconvenience — it directly undermines the appeal of pairing a micro frame with DJI O4 quality transmission. Compared to rival 4K camera drone options in the O4 micro category, competitors with better-executed vibration isolation present a more compelling package for pilots who prioritize clean footage. The Draknight O4 is not without merit — it is lightweight, well-designed structurally, and competitively priced — but buyers focused on video quality should research alternatives before committing. A camera mount redesign could make this drone genuinely competitive.

Source: Review: HGLRC Draknight O4 — This Sub-100g Micro FPV Drone Has a Major Jello Problem – Oscar Liang