Beta85X DJI Digital Caddx Nebula Nano & Crossfire

By wrong17 on Jun 04, 2020

12  800  4

I moved everything off of the Beta95X frame to a Beta85X. Since the iFlight Alpha A85 release I wanted to try and build something that is similar in size. I cannot even come close to the 6 minutes of flight time iFlight is getting. I get on an average flight of 3 minutes with a GNB 3S 520mah lipo. Keep in mind, I never charge the HV lipos past 4.2v per cell. One of the best thing about this smaller frame is NO DUCTS in the video!!! Even with the camera at zero angle, still not ducts in view.

Caddx Nebula Nano

So far, the only good thing about the Nebula is the lower cost. The 4g weight difference is next to nothing and the lower image quality is not worth the 4g that I am saving. After having the Nebula for a few months, I got use to the “Fog of War” look.


After testing a few different props, I settled with HQ Prop Durable T2x2x4 Quad-Blade. Like with all the 4 blade props, it had the best cornering. I also liked the DAL Cyclone props but I see a lot a jello when I fly outside with them. The Emax 2.3 tri blade that was custom cut to 2” had the best low end thrust but lacked the efficiency like the HQ 2x2x4 props.

Aug 09, 2020 - BiDirectional DSHOT Enabled & RPM Filtering

I finially took the time to watch some youtube video about setting up Bi-Directional DSHOT and RPM filters. The quad is using BLHeli_S I had to flash a custom firmware on to the BetaFPV AIO board. I followed this guide to installe the correct ESC firmware:

Then I used this guide to setup the RPM Filtering:

My first flight with the new firmware and rpm filtering, I gained almost one more minute of flight time. The is a huge improvement considering I was only getting 3 mintues of flite before these changes.

Here is a video of the first flight with bidirectional DSHOT and RPM Filtering



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Jaorru   Dec 28, 2021  

Hi man! nice build! Was it difficult to fit that canopy in the beta85x build?
thanks a

wrong17   Dec 29, 2021 

Thanks, No it was not difficult to fit that canopy on the Beta85X frame. All the holes are there and it lines up perfectly. The only problem is the camera. The original Caddx Vista camera is a tad too big fit in that canopy and I had to heat the plastic stretch it out to get it to fit. At the time I built this quad they did not release the other cameras like the nebula pro so I am not sure how that would fit in there.

DigitalLover   Nov 03, 2020  

What battery and fly time you got?

wrong17   Nov 03, 2020 

With a GNB 520mah HV lipo and NOT charged to High Voltage (4.2v per cell) I get up to 4 minutes. If I charge it to HV (4.35v per cell), I will get 1 more minute.

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