ORIGINAL: huggins
While this is true for Ail, Elev & Rud channels, the throttle expo on the 9c (can't speak for other radios) is spread from low to high. I use throttle expo on all of my planes to get the rpms where I want them on the stick. I have used the 5 point mix as well, but I have found the expo method to work fine for my needs and is less hassle.
And I thought I came up with the best answer so far. I didn't know that the 9C DOES have the "special" expo function on the throttle channel. I'm sorry.
T