Hi

 

I have been noticing that on takeoff using TOGA, once reaching 80-100kts, my thrust will instantly reduce to about 60% N1, and I have to re-advance the throttles to takeoff thrust. It appears that it is the throttle on my joystick is making very small movements that are overriding the auto throttle. The auto throttle is not overridden before 80-100kts, and moving the hardware makes no difference, but when I reach that speed, the hardware throttle regains control to adjust the throttle in the sim. Once gaining about a thousand feet of altitude, my hardware looses the ability to override the auto throttle, and all is normal. Also, when I do have control over the throttles using hardware, when I shouldn't, I am not able to move the throttles above the thrust limit set for takeoff. The setting in the CDU for hardware overriding the auto throttle is OFF.

 

Any way to fix this, or am I doing something wrong?

 

Thanks

At 80-100kts, the autothrottle goes into HOLD mode, at which point you have control of the throttle (In case something moves in front of you and you need an instant increase or reduction in thrust).  In the real airplane, this doesn't affect anything as the throttles are always 'synced'.  The problem comes from the simulator perceiving this as the autothrottle turning off, and hence allows the physical throttle to override the current setting.

You want the AUTOTHROTTLE to ALWAYS OVERRIDE hardware. In other words once you have pressed the TOGA switches, you can dance a jig with your physical hardware and nothing will happen.

At 80-100kts, the autothrottle goes into HOLD mode, at which point you have control of the throttle (In case something moves in front of you and you need an instant increase or reduction in thrust).  In the real airplane, this doesn't affect anything as the throttles are always 'synced'.  The problem comes from the simulator perceiving this as the autothrottle turning off, and hence allows the physical throttle to override the current setting.

That sounds like whats going on. Thanks for the help.

 

You want the AUTOTHROTTLE to ALWAYS OVERRIDE hardware. In other words once you have pressed the TOGA switches, you can dance a jig with your physical hardware and nothing will happen.

That is my goal, but from the above post, that may not be possible.

That sounds like whats going on. Thanks for the help.

 

That is my goal, but from the above post, that may not be possible.

It is possible. Look at the 3 different options in the FMS, under PMDG > Aircraft menu. 

It is possible. Look at the 3 different options in the FMS, under PMDG > Aircraft menu. 

I didn't look that closely into the options, but I found it and problem solved! Thanks for the help!

Jgid, on 20 Jun 2014 - 4:44 PM, said:

I didn't look that closely into the options, but I found it and problem solved! Thanks for the help!

Glad that helped you. Always look closer, there are many settings lurking in the FMS!