Somewhat inspired by the Umma85/95 cinewhoops, BetaFPV released their own “pusher” BNF (bind-and-fly) drones, the Beta85X V2 and Beta95X V2. Conversion kits are also available for turning your old 85X and 95X into a pusher.
Where to Buy
BNF Quads (pre-built):
- Beta85X V2: https://oscarliang.com/product-ht5k
- Beta95X V2 Analog: https://oscarliang.com/product-cbim
- Beta95X V2 DJI FPV: https://oscarliang.com/product-vwx0
Pusher Conversion Kits:
A “pusher” configuration is basically a flipped over quad, with the motors and flight controller mounted upside down.
This doesn’t really change flight performance, the main advantage of a pusher is the large space available on top of the quad after it’s turned upside down, free from the obstruction of the spinning propellers.
A pusher cinewhoop is nothing new, but it was made popular by Ummagawd’s Umma85 and Umma95, see my build logs here:
These are very cool looking builds, with very effective “clean and dirty” vibration dampening sections, all made possible by the pusher configuration. However, speaking from experience, they were very difficult to build, and it’s tedious to access the flight controller (you basically have to take it apart to connect the USB cable), mostly due to the DIY nature of these builds.
Enters the Beta85X V2 and Beta95X V2!
The new design from BetaFPV makes these pushers a lot easier to use. And if you already own the original version of the Beta85X and 95X, you can just get the pusher conversion kits without spending extra on a new quad.
Pusher Conversion Kits
Thanks to BetaFPV for sending me these conversion kits, unfortunately I don’t have a spare Beta85X or Beta95X to try them (as both have been built into the Umma85/95), but I’ll use them when I have a chance :)
The Beta85X Kit comes with the following parts:
And the Beta95X kit comes with the following parts:
The parts are more or less the same as the 85X, just different bottom plates (carbon fibre) for the larger frame size.
Again it comes with Insta360 GO and GoPro Lite V2 Mounts.
And the VTX holder
If you buy a pusher off the shelf, chances are it’s already configured for you. But if you are converting your normal quad into a pusher, there are a few things you have to change in Betaflight for it to work correctly, because the FC and motors are flipped upside down.
Table of Contents
FC Board Orientation
In Configuration tab, find Board and Sensor Alignment, and set Roll degrees to 180
Now go to the Setup tab, and confirm if the 3D model is now moving the same direction as your quad.
Enter ‘resource’ and take note of the pin numbers for motors 1-4. This is going to be different on different flight controllers. These are the pin numbers from mine.
Simply swap the pin numbers for motor 1 and 3, and for motor 2 and 4, enter it back in CLI, in my case, this becomes:
resource MOTOR 1 B06
resource MOTOR 2 B07
resource MOTOR 3 B03
resource MOTOR 4 B04
Now test your motors and see if they work properly.
Finally, check motor spin directions, reverse them if necessary. You should also decide whether you want to run “props out” or “props in” (I prefer props out on this build):
Propellers should be mounted “upside down” too just like the motors.