Built to go toe to toe with 5" Freestyle quads whilst weighing under 250g. The AOS 3.5 EVO has been updated to be compatible with the new DJI O3 Air Unit as well as existing 20x20mm and 25.5x25.5mm electronics. The camera cage and arms have been reinforced to improve durability. As with all AOS frames exceptional vibration and resonance performance is guaranteed, eliminating IMU resonance issues with O3 image stabilisation.
The AOS 3.5" was born from an analysis of quadcopter weight against prop size. The result was the identification of disc loading as a key parameter that could be compared between quads of different sizes and was a strong predictor of flight performance for freestyle flying.
By looking at the flight performance of a large number of quads it was possible to identify the ideal disc loading for a freestyle drone and thereby calculate the ideal prop size for an FPV freestyle drone of a given weight.
When that analysis is performed for 250g the ideal prop size turns out to be very close to 3.5" and several good 3.5" props are available.
Highlights
Designed for up to 3.5 inch props
160mm wheelbase
4 mm Arms
One 25.5x25.5 or 20x20 mm stack in the front and one 25.5x25.5 or 20x20 mm stack in the rear OR
One 25.5x25.5 or 20x20 mm stack in the centre
Fits the DJI O3 Air Unit, Caddx Vista or HDZero Whoop VTX perfectly
Fits both 20mm (DJI and O3 camera) and 19mm (Micro sized) cameras
Changelog
July 20, 2023: Updated with silicone dampers and secured battery plug.
Specifications
Product Name: AOS 3.5 EVO V1.2
Flight Electronics: BLITZ F7 AIO
Video Transmission: DJI O3 Air Unit
Frame: 162±2mm wheelbase
Motor: XING 1504 3100KV motors
Prop: HQ 3.5*2.5*3 propellers
Takeoff Weight: Approx. 185.5g (Without Battery)
Takeoff Weight incl. 850mAh：Approx. 281±10 g
Takeoff Weight incl. 1050mAh: Approx. 320±10g
Dimensions (L×W×H)：131×94.5×29 mm
Max Speed：110 Km/h (Manual Mode)
Maximum Takeoff Altitude：3000 m
Max Hover Time: Approx. 12 mins with 850mAh no load
Max Flight Distance：2-3 km
Max Wind Speed Resistance: Level 4
Operating Temperature Range：-10° to 40° C (14° to 104° F)
Antennas: 1 Antenna
GNSS: N/A
Video Transmission
Product Name：DJI O3 Air Unit
Communication Frequency：2.400-2.4835 GHz (RX only) / 5.725-5.850 GHz (RX and TX)
Communication Bandwidth： Max 40 MHz
Live View Quality and Latency
With DJI FPV Goggles V2:
810p/120fps Video Transmission Quality: The video transmission latency is lower than 28 ms.
810p/60fps Video Transmission Quality: The video transmission latency is lower than 40 ms.
With DJI Goggles 2:
1080p/100fps Video Transmission Quality: The video transmission latency is as low as 30 ms.
1080p/60fps Video Transmission Quality: The video transmission latency is as low as 40 ms.
Max Video Transmission Bitrate：50 Mbps
Max Video Transmission Range：10 km (FCC), 2 km (CE), 6 km (SRRC)
Audio Transmission：N/A
Packing List
1 x AOS 3.5 EVO V1.2 4S HD BNF
2 x Battery pads
2 x Prop(Pairs)
Important
Don't worry about tuning, we did that for you already! A basic PID- and Filter tuning was applied for a great flight experience!
To restore lost tunes or updates, please check our linked article on "Firmware/Factory Dumps"
Angle-Mode (self balancing level mode) is enabled by default to make sure your first flight doesn't end in a mess!
Please check our linked article on "How to disable Angle-Mode, activate Acro-Mode"
Note
1. iFlight products may be used for civilian purposes only and any direct or indirect use of iFlight products for or in connection with the following is prohibited:
(1)Any military combat purpose or military combat related use;
(2)Terrorist activities: The purchaser also shall require its customers or end users to comply with the foregoing requirements.
2. If party A has violated applicable export control or economic sanctions laws and regulations, Party B has the right to immediately suspend delivery of products to Party A or terminate relevant cooperation without any liability.
Flies nice enough but I guess I’m used to thrashing my tinyhawk3 at a playground. One pretty average bang while flying around under my piano broke the frame in 3 places. I was baffled at how it took so much damage. The warranty is still pretty expensive when you consider shipping. We’ll see how the replacement goes.
