AlfaRC Fi-115 Toothpick Frame Kit for DJI O4 Air Unit - Ultra-Lightweight 2.5-Inch FPV Freestyle and Racing Micro Drone Frame with DJI O4 Integration
The AlfaRC Fi-115 is a toothpick-class FPV drone frame designed specifically for the DJI O4 Air Unit, providing a purpose-engineered mounting solution for DJI's O4 digital FPV transmission system in a 2.5-inch propeller micro drone form factor. The toothpick frame architecture prioritises minimum weight and maximum strength-to-weight ratio through a slender arm and thin-plate construction approach that reduces all-up weight to the lowest practical level for the 2.5-inch propeller class, directly extending hover time, improving agility, and reducing the kinetic energy of any impact during FPV freestyle and indoor proximity flying, where the micro drone format is most operationally relevant. The Fi-115 designation reflects the 115mm motor-to-motor diagonal wheelbase, positioning this frame in the compact micro class between sub-100mm whoop builds and full 3-inch toothpick configurations, with the 2.5-inch propeller diameter delivering the balance of thrust, efficiency, and physical compactness characteristic of this intermediate frame size.
The frame is specifically designed to accommodate the DJI O4 Air Unit mounting dimensions and antenna routing requirements, with dedicated mounting points and clearances for the O4 Air Unit camera, antenna, and main board positioned to maintain the structural integrity of the toothpick arm layout without the compromises required when adapting a non-O4-specific frame to DJI O4 hardware. This purpose-built O4 compatibility ensures clean antenna placement for optimal digital video link performance, correct camera angle adjustment range for the DJI O4 camera module, and secure O4 Air Unit retention in the crash-intensive operating environment of FPV freestyle and micro racing. The kit format includes the complete frame component set required for assembly, providing a weight-optimised, DJI O4-compatible 2.5-inch toothpick platform for pilots transitioning from analogue micro FPV builds to DJI O4 digital video on a compact, lightweight toothpick frame.
Key Features
- DJI O4 Air Unit Compatible: Purpose-engineered mounting points, clearances, and antenna routing for DJI O4 Air Unit camera, antenna, and main board integration without adaptation
- 2.5-Inch Propeller Class: Designed for 2.5-inch propellers for the balance of thrust, efficiency, and physical compactness characteristic of the intermediate micro toothpick class
- 115mm Wheelbase: Fi-115 motor-to-motor diagonal wheelbase positioning between sub-100mm whoop and full 3-inch toothpick frame classes
- Toothpick Architecture: Slender arm and thin-plate toothpick construction for minimum all-up weight and maximum strength-to-weight ratio in the 2.5-inch propeller class
- Ultra-Lightweight Design: Weight-optimised toothpick frame geometry directly extends hover time, improves agility, and reduces impact kinetic energy in freestyle and indoor proximity flying
- DJI O4 Camera Mount: Dedicated camera mounting for the DJI O4 camera module with correct angle adjustment range for FPV freestyle and racing flight attitudes
- Optimised Antenna Routing: Frame geometry accommodates DJI O4 antenna placement for clean antenna positioning and optimal digital video link performance
- Complete Frame Kit: Full frame component set included for complete assembly without additional structural components
- FPV Freestyle and Racing Optimised: Toothpick frame geometry and 2.5-inch propeller format suited to freestyle proximity flying, indoor micro racing, and outdoor micro FPV builds
- Crash-Resistant Construction: Toothpick frame material and geometry selected for resilience in the crash-intensive operating environment of FPV freestyle micro builds
Applications
- DJI O4 Air Unit micro FPV builds requiring a purpose-designed 2.5-inch toothpick frame with dedicated O4 mounting points and antenna routing
- FPV freestyle and proximity flying builds in the 2.5-inch propeller micro class, requiring a minimum-weight toothpick frame with a DJI O4 digital video
- Indoor micro FPV racing builds require a compact 115mm wheelbase toothpick frame with DJI O4 Air Unit integration
- Pilots transitioning from analogue micro FPV builds to DJI O4 digital video in the 2.5-inch toothpick frame class
- Ultra-lightweight micro FPV builds where the toothpick architecture minimises all-up weight for maximum agility and extended hover time on small-capacity LiPo cells
- Outdoor micro FPV freestyle builds requiring the compact physical footprint and DJI O4 digital link performance of the Fi-115 toothpick platform.
Package List:
- 1xSet Frame KIT, without any electronic equipment.
