Starting with Betaflight (BF) 3.3.x there is a new filter introduced by BF developers that promises significant difference in flying characteristics of a quad. Unfortunately, to use it is not as simple as clicking a button. There are few steps that needs to be done to enable this new filter:
Before we go through all the steps required, below are the checklists if you have proper Flight Controller (FC) or not:
- at least FC with STM32F3 chip (F4 is recommended).
- please note type of gyro chip used on the FC.
Although the hype currently is regarding the use of Kalman Filter in flight controllers for smooth flight, the disadvantage using Fast Kalman Filter (FKF) is that it requires a minimum of STM32F4 chip on the FC.
BF developers came up with alternative optimized filtering method which uses less computing load on the flight controllers and not much juicy difference compared with FKF implementation. This means that Betaflight enables up more Flight Controllers that can utilized this new filter.