Hallo Freinds ! 
As i am new to Fpv i need little help regarding Flight controller.

which flight conroller is best for Inav? F7 F4? please suggest me in both size 30x30 and for 20x20.

Thank you

Welcome to the forum!

An f7 processor is always better than an f4, it just depends on if you need the improvements or not. I don't run inav personally, but id go take a look at their supported boards list first, as not all betaflight boards are supported, and then if you are looking for the most performance, pick an F7 version thats well known/easy for you to get.

As for specific brands or models to recommend, I use speedybee (on betaflight) and they make excellent f4 and f7 stacks and work on inav for 30x30 boards. There is one bug to mention; speedybee boards appear to not work with DSHOT, which to you mostly means you cant use turtle mode. otherwise everything else should be the same.

You don't say if you are are flying a wing or a quad but I suggest you look at one of the Matek FC's. Matek have worked quite closely with the INAV developers for a long time so Matek FC's usually just work under INAV without too many issues. Some of the other manufacturers FC's can be a bit of a gamble with INAV.

(07-Mar-2023, 04:53 PM)matt0725 Wrote: Welcome to the forum!

An f7 processor is always better than an f4, it just depends on if you need the improvements or not. I don't run inav personally, but id go take a look at their supported boards list first, as not all betaflight boards are supported, and then if you are looking for the most performance, pick an F7 version thats well known/easy for you to get.

As for specific brands or models to recommend, I use speedybee (on betaflight) and they make excellent f4 and f7 stacks and work on inav for 30x30 boards. There is one bug to mention; speedybee boards appear to not work with DSHOT, which to you mostly means you cant use turtle mode. otherwise everything else should be the same.

Thank you for your response. yes i will go for  F7 board because of better perfomance as you mention.

(07-Mar-2023, 05:00 PM)SnowLeopardFPV Wrote: You don't say if you are are flying a wing or a quad but I suggest you look at one of the Matek FC's. Matek have worked quite closely with the INAV developers for a long time so Matek FC's usually just work under INAV without too many issues. Some of the other manufacturers FC's can be a bit of a gamble with INAV.

Thank you for your reply . i am intrested to bulld 3 inch quad .which matek board do you suggest?

https://github.com/iNavFlight/inav/wiki/...ted-boards

(07-Mar-2023, 05:40 PM)FarazFpv Wrote: Thank you for your reply . i am intrested to bulld 3 inch quad .which matek board do you suggest?

For a 3" quad I would look at the 20x20 F405-miniTE...

http://www.mateksys.com/?portfolio=f405-minite

iNav , Arducopter, need MCU with more flash.

F411CEU6 512KB
F405RGT6 1024KB
F722RET6 512KB
F745VGH6 1024KB
H743VIH6 2MB - don't confuse for early H7 FC with different chip that had 256KB

If you are flying wing, you dont need much.
For quadcopter, 3 UART is ideal. Receiver, VTX, GPS.
*SOME* F411 you can "simulate" UART (ie Soft Serial), reusing motor pads or LED, etc.

Personally, I always get F405. Its not simple as F405 168Mhz vs F7 216Mhz. F7 is actually twice as fast. But F405 gets job done.
And F745 or H7 cost a lot more.