Beta85X DJI Digital Caddx Nebula Nano & Crossfire

By wrong17 on Jun 04, 2020

7  275  0

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.

Propellers

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: https://www.multirotorguide.com/guide/how-to-flash-blheli_s-firmware-with-bidirectional-dshot-rpm-filtering/

Then I used this guide to setup the RPM Filtering: https://oscarliang.com/rpm-filter/

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

Photos

Discussion

Sign in to comment

Guides & Reviews

29 1,491  11
23 days ago

Until recently GoPros were delegated to larger quads. A typical GoPro weighs around 125g and we've only recently begun to mount them on 3" cinewhoops. Even that is a stress on the motors. Now we've got the "GoPro Lite". Remove the battery, displays and casing and you're left with a small, lightweight board and sensor. Wrap it in protective TPU casing and you've got a 30g micro GoPro. The Hero6 is..

Read more
44 4,981  47
May 05, 2020

This guide will walk you through the process of building your first FPV quad. The goal with this design was to build a low-cost, lightweight quad, yet powerful enough to safely carry a GoPro in close proximity areas. I chose these parts to minimize the amount of soldering at no cost to the quality. A typical build requires around 30 solders while this only needs 25. It's not a huge difference, but..

Read more