AlfaRC Fi-135 3-Inch Carbon Fiber Frame Kit for DJI O4 Air Unit

The AlfaRC Fi-135 is a 3-inch frame with a 135 mm wheelbase, designed around the DJI O4 Air Unit and cut from 3K carbon fibre at just 33 g. It suits pilots building a light digital 3-inch for freestyle or racing, with space to add a small GPS module for rescue mode.

Key features

• Dedicated DJI O4 Air Unit mounting with a 14 mm bay for nano-size cameras
• Three flight-controller patterns, 20 x 20, 25.5 x 25.5 and 26.5 x 26.5 mm, so both AIO boards and 20 x 20 stacks fit
• 9 x 9 and 12 x 12 mm motor hole patterns for a wide choice of micro motors
• GPS bay sized 17 x 12.5 x 5 mm for BE122/BZ122-size modules
• 3 mm bottom plate, 2 mm top plate and 1.5 mm side plates, with 24 mm columns for stack clearance

Specifications

• Wheelbase: 135 mm
• Propeller size: 3 inch (75 mm)
• Material: 3K carbon fibre
• Plate thickness: 3 mm bottom, 2 mm top, 1.5 mm sides
• Column height: 24 mm
• FC mounting: 20 x 20, 25.5 x 25.5, 26.5 x 26.5 mm
• Motor mounting: 9 x 9 / 12 x 12 mm
• Camera: DJI O4 or 14 mm nano
• GPS bay: 17 x 12.5 x 5 mm
• Frame weight: 33 g

Motors, flight controller, air unit and 3-inch props are sold separately.