Oversky MUL-A maiden test flight

After all the modifications I did to FC, OSD, PDB it was time to do a test flight.
sadly I do not have a complete drone frame available at the moment. So I grabbed some parts from other frames and drones lying around and build something that should be able fly.
Current setup for this maiden testflight: 1806 2300kv motor with 4 inch props on 3cell. This should produce just enough lift to hover.


And yes the Oversky MUL-A is flying. It needs to be tuned, but I'm not going to spend time on tuning this setup as this is just a test setup. Now I have to make or buy a suitable frame for this flightcontroller.

Oversky Mul-A FC assembly

I 3D printed a mounting bracket for the Oversky MUL-A flight controller and the camera. The Camera mount is connected to the FC mount and all this will be isolated from the frame with rubbers.

The camera that I've connected to the FC is the RUNCAM OWL (v1). This camera is small and fits easily on the FC board. It can also be connected directly to the FC camera connector without the need of an external power cable or source. I also added a heatsink on the VTX. During testing on my workbench I noticed the VTX can become really hot.

The weight of the total assembly as shown on the last picture is 62 grams.

The FC is mounted to the 3D printed bracket with 2mm screws. The screw holes in the FC board are 1.4mm but you can safely drill (enlarge) them to 2mm.

hobbyking Oversky MUL A Flight Controller

Hobbyking is currently selling the Oversky MUL A Flight Controller at ridiculous low price. This FC has everyting onboard and is currently for sale at hobbyking for less then 5$. But is it worth buying this FC ano 2023? What can you expect from it and what can you do with it.

The specs of the board are very promising.

• CPU FC board : STM32103CBT6
• IMU FC board : MPU6050
• USB,OSD,DCDC power
• 5.8G analog VTX/500mw/32CH/cam supports FatShark goggles
• LED tail lights and Buzzer
• 7 channel DSMX compatible receiver
• Supports outside compass and sonar
• Supports Cleanflight and Baseflight firmware


This board has no MAG and no BARO sensor. This can be a problem if you want to use this board for autopilot missions. But for basic FPV flights these sensors are not needed.

So I bought the board and here is the verdict:
This FC board is worthless unless you are realy into DRONE DIY projects and have some soldering skills. So don't buy it if you need a PNP (plug and play) flight controller for your drone project.

And here is why:
- The FC board, which is NAZE32 compatible, is shipped with Cleanflight version 1.12. This version is outdated and you can't find a working PC software to configure it (ano 2023). You need to upgrade to a more recent version.
- The OSD chip which is minimosd compatible is shipped with MWOSD version 1.5. This version is outdated and you can't find a working PC software to configure it (ano 2023). You need to upgrade to a more recent version.
- The PDB has very small soldering pads to connect the ESC (motor controller). The manual states that brushless motor as from size 2203 are not suported. This is due to the current limition of the PDB caused by the small soldering pads. My guess is that even motors with size 1806 or even 1407 can demand to much current and can damage the soldering pads.

In the next BLOGS I'll provide more information on how to overcome these issues and update this FC so it can be used ano 2023. So after some tuning you will have a working AIO Flight controlle for less than 5$! Be quick before they are soled out.

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The Oversky Scisky MUL A Flight Controller is also soled at the website of OverskyRC. The FC manual for this product can also be downloaded from the OverskyRC website.