Hi Tim,
I am about to look at x-plane for some potential simulation work, and I *think* you mentioned in some post/podcast (which I can't find) that x-plane reversed reporting of p,q,r values - or something to that effect. Am I remembering this right? I would expect that p is rotation around x-axis, q is rot. around y-axis, and r around z axis -- is this how x-plane is reporting it or is there a discrepancy? Also, do you know if x-plane's reported values for accelerations ( ax,ay,az) are already adjusted for centrifugal acceleration or not? Any other data "gotchas"? Thanks!

Hi, Tim. Do you know the control algorithm about quadrotor? Could you help me about the control algorithm design. I was design the autonomous quadrotor. But I found that the paper mapping algorithm couldn't use for the quadrotor. Do you know the person Daniel Mellinger? I have seen his work and it was very cool.

I was now tunning the PID controller but now was not stable when roll and pitch channels combined together. My email address is yaojingmas@yahoo.com.cn . Thanks.