iFlight AOS 3.5 V5.1 FPV Frame Kit

The iFlight AOS 3.5 V5.1 FPV Frame Kit supports freestyle builds using up to 3.5-inch propellers. It combines AOS X-Cell Anti-Vibration Technology, reinforced arm geometry and a 7075 aluminium camera cage, with space for up to two electronics stacks. Supplied accessories include TPU parts, a screw bag, two battery straps and two battery pads.

iFlightDrone frame

Weight: 81±5g

Product overview

The iFlight AOS 3.5 V5.1 FPV Frame Kit supports freestyle builds with propellers up to 3.5 inches. AOS X-Cell Anti-Vibration Technology is paired with revised interlocking arm geometry and a central spine that reinforces the arms and stiffens the flight controller mounting. Its reinforced 7075 aluminium camera cage accepts 19-20mm cameras using hard or soft mounts. A 155° field of view keeps propellers out of view, while a 27x21mm M2 mounting pattern supports GoPro installation.

The frame measures L133*W93*H30 mm, with a 162mm wheelbase and a weight of 81±5g. It accommodates up to two 25.5x25.5 or 20x20 mm stacks; flight stack and VTX height are each limited to 20mm. Compatible video systems include DJI O3 air unit, Vista HD system, BLITZ Whoop 1.6W VTX, DJI O4 Air Unit and DJI O4 Air Unit Pro. Battery mounting can run lengthwise or use a toilet tank arrangement. The arms are 4mm thick, the bottom plate is 2mm, and the top and upper plates are each 1.5mm.

Supplied equipment comprises one AOS 3.5 V5.1 frame kit, TPU parts, one screw bag, two battery straps and two battery pads. Standard manufacturing tolerances may be ±0.2mm for thickness and ±0.1mm for hole size. If the ESC-mounted capacitor obstructs installation, replace it with an externally connected capacitor; the recommended rating is 50V 470uf/35v470uf.

Propellers & airframes

Specifications

iFlight AOS 3.5 V5.1 FPV Frame Kit specifications
Specification	Value & conditions
Product name	AOS 3.5 V5.1 Frame Kit
Frame wheelbase	162mm
Frame dimensions	L133W93H30 mm
Arm thickness	4mmStandard manufacturing thickness tolerance may be ±0.2mm.
Top plate thickness	1.5mmStandard manufacturing thickness tolerance may be ±0.2mm.
Bottom plate thickness	2mmStandard manufacturing thickness tolerance may be ±0.2mm.
Upper plate thickness	1.5mmStandard manufacturing thickness tolerance may be ±0.2mm.
Maximum flight stack height	20mm
Maximum VTX height	20mm
Motor mounting	9x9-φ2mm/12x12-φ2mmStandard manufacturing hole-size tolerance may be ±0.1mm.
Flight stack mounting	2020 Φ2mm / 25.525.5 Φ2mmStandard manufacturing hole-size tolerance may be ±0.1mm.
VTX mounting	2020/Φ2mm / 25.525.5/Φ2mmStandard manufacturing hole-size tolerance may be ±0.1mm.
Weight	81±5g
Compatible video systems	DJI O3 air unit/ Vista HD system/ BLITZ Whoop 1.6W VTX/DJI O4 Air Unit/DJI O4 Air Unit Pro
Propeller support	Up to 3.5-inch propellers
Anti-vibration technology	AOS X-Cell Anti-Vibration Technology
Stack capacity	Up to two 25.5x25.5, or 20x20 mm stacks
Field of view	155°No propellers in view.
DJI O3 support	Fully compatible with DJI O3, with soft mount and ND filtersDJI O3 configuration.
Camera support	19-20mm camerasHard or soft mounted.
Camera cage construction	Reinforced 7075 aluminium camera cage
Battery mounting	Lengthwise or toilet tank battery mounting
GoPro mounting pattern	27x21mm M2
Arm and flight controller reinforcement	Improved interlocking arm geometry and a central spine reinforce the arms and further stiffen the flight controller mounting.V5.1 frame.
Packing list	1 x AOS 3.5 V5.1 Frame Kit; 1 x TPU Parts; 1 x Screw Bag; 2 x Battery Strap; 2 x Battery padsIncluded equipment.
Thickness tolerance	±0.2mmStandard manufacturing tolerance may apply to product thickness.
Hole size tolerance	±0.1mmStandard manufacturing tolerance may apply to hole size.
ESC capacitor installation	Replace the ESC-mounted capacitor with an externally connected capacitor for installation; recommended capacitor: 50V 470uf/35v470uf.When an ESC does not fit properly because of its capacitor.