Please look into control theory for autothrottle operation at cruise

[Hawkeye91]

One of my biggest pet peeves many developers don’t get right in simulating their aircraft. I really enjoy the 737-300, but the auto throttle wandering at cruise is so obnoxious with the throttles constantly wandering from 70% to max cruise N1, not to mention it makes using fuel calculations difficult as you don’t have a very steady fuel flow. Real autothrottles don’t do this. One of the things real engineers do to prevent autothrottle wandering is to code the throttle adjustments at cruise in relation to accelerations/decelerations sensed by the INS, NOT from an airspeed indication as airspeed indications can be too erratic. For example, if you’re using a PD controller with tied to airspeed error and airspeed rate, the erratic fluctuations of airspeed rate will mess with the algorithm where as a more stable rate input such as ground speed would be better to prevent over/undershoots of the autothrottle. I am by no means an expert in programming or  aircraft engineering, but I’ve definitely seen the autothrottle wandering not be an issue with many of the 3rd party aircraft for X-Plane for a similar price point as the IXEG. Please consider fixing this issue, and help bring the plane from very good to great.

[tkyler]

Thx for reporting and your patience.  We've added it to the list.  We won't cease working on the IXEG and will certainly endeavor to increase accuracy in all areas, including this one.   Now that we have the 737 out....we have to stabilize a few super obvoius oversights...but after, we'll enter a quite long phase of tweaking all those perf issues while we tackle our other roadmap items as well.

-TomK