I know of modes 1 and 2 but are there any more. I think I remember seeing a mode 3. Is that possible?

There's 4 modes, it all has to do with what controls are one what stick axis, the most common is mode 2, throttle/collective and rudder on the left and both cyclics on the right.

http://www.rc-airplane-world.com/rc-...ter-modes.html

Thanks. I knew about mode 1 and 2 and I wasn't sure if there was a mode 3 or more...