Expo Question

[shaun.e]

I am using the latest version of Phoenix with a Futaba T7C tx. I was looking at the advanced tx setup page and noticed the option to have an exponential curve on the aileron, elevator and pitch channels. I set it to -25% and the curve looked like it would be MORE sensitive around centre stick. I then looked at +25%, which showed a curve that made more sense to me, being LESS sensitive around centre, so I selected this and guess what - so much easier to fly on the sim.

The dilemma that I now have is that on the same tx for flying my Trex 450/500/600, I am using -25%, as per the manual, and the stick inputs that I generally use are soooo small. So is Phoenix wrong or have I made a monumental error on the tx for model flying?

[David Drew]

Futaba use negative numbers for Expo, so -25% is really 25% expo. Less twitchy. Phoenix uses positive number for expo. So +25% is 25% expo

[shaun.e]

Futaba use negative numbers for Expo, so -25% is really 25% expo. Less twitchy. Phoenix uses positive number for expo. So +25% is 25% expo

Thanks David, I think? Please bear with my slow uptake on this - am I correct on the tx for flying the heli with -25% (?) why on Phoenix am I now finding it much easier? Should I change the tx settings for the heli?

[DIJ]

Futaba use a negative percentage to make expo less sensitive as David said, so you will need to set expo to a minus figure on your TX. Try playing with the expo in phoenix (using positive values) and see what effect different amounts have. There is no hard and fast rule for how much expo to use, and you are right about it making the heli easier to fly.