Let me start by saying I have a new Futaba T6XA (new to me that is) so it may be just a setting that I cannot figure out but here is what is going on:

I can get full and closed throttle but the radio stick only travels 1/2 way.

All the way up on the stick gives me full throttle but the engine quits with the throttle stick centered. The trim is centered too.

I swapped the throttle servo with another one and the same occurs. I took the throttle servo and plugged it into the elevator plug of the receiver and it deflects fully. So, it's not the servo. I plugged the elevator servo into the throttle plug of the receiver and it acts like the throttle servo did. The throttle opens quickly but at about 1/2 down the servo moves slow. There are no linkages connected for these tests so no binding to figure into the equation.

Could the throttle circuit of the receiver be bad?

I checked the radio exponentials and they are all set to 0.

This was a gift and she flies great, with that exception. It's not a big deal, but just would like to figure out if it is me or not.

Thanks in advance for the help.

Did you check the end point adjustment (ATV) setting?

I just did discover that... And sure enough that was it. Thanks for the quick response...

Richard (going back to read the manual a few more times...) Wright

Glad to help. Just to be safe you might want to review all the settings and make note of the throw distances for the control surfaces. Once you've got all this, reset the factory settings back to the default. The manual says how to do this. This will help you avoid any more surprises. Then go through and redo the servo direction settings, etc. If any channels needed significant endpoint adjustments, change the throw travel on the servo or control horn instead. ATV should be for minor corrections only, major ones should be corrected manually.

Agreed. When I discovered the ATV I went through them all. Most were minor but the throttle was significant. I reset it to the best I could but it still needed a lot. I checked the deflections before I flew and all were per the manual. The throttle was the only one that was not as it should be but it is now. Thanks again.