Rdsok, I have no clue what you just said. So this sbus stuff is only for quads and stuff?
If I wanna use it in an airplane or heli I still need a receiver?
No... not what I said... although it's used a lot in multirotors and heli's... it's also used in airplanes and such. For a moment, let's forget about the old analog stuff and for now.. also the flight controllers ... I'll touch on those later.
Lets start the discussion technically correct ( I'll start there and then try to use an analogy to simply and explain it )... SBus is a digital serial interface that allows up to 16 channels in a single line. The SBus servos are programmed ( set ) to their assigned channel so they know which input channel to pay attention to.
A modern computer analogy would be something like a USB hub that you plug into a single port on your computer but can plug many other USB devices into. Of course with a USB hub we'd be plugging in printers, hard drives, flash drives etc... On SBus it'd be servos, motor controllers and the like.
Here is a simple short SBus hub with 3 ports for servos or other SBus hubs etc...
Here is an example setup on a large scale airplane using just the SBus hubs ... Notice how the single line goes to the first hub and is then connected to other hubs that having either servos and/or hubs attached to them. Now for a moment, imagine the mess of wires that would need strung back to the receiver if this was setup using the old style receiver and servos.
Now... let's switch up and talk about using standard servos with a convertor that is similar to what the hub does but for PWM servos ( analog or digital )... here is such a hub that supports up to 16 channels for standard servos
Now to touch on flight controllers... Some of them can do the same as the last SBus hub to PWM servo adapter I posted last... Some work with just SBus servos and some a combination of them... What a particular flight controller supports will vary by which model you are talking/looking at... so you'd need to know which type you'd need first.
Some Sbus type receivers have options to support both SBus as well as PWM servos. Of course they'll be much larger than the one you've got since they'd need pinouts for the standard ( old school ) servos also.
So SBus can be used with any type of airframe. It can simplify the wiring in many cases and I suspect it's going to be the next standard that most all controllers will be using.