Sean McLeod

Have you seen it working if you use the default 737 example? Also, is the State Vector you're showing definitely being updated as opposed to just showing the initial state?...

> if the initial altitude above ground level is 0, Hmm, I haven't looked at the trim code in detail yet, but whenever I see an AGL of 0 the...

Are you sure the aircraft should be trimmable at the initial conditions you're specifying for the trim? Or there could be an issue with the FDM file you've created. If...

Just had a very quick glance. Is the engine definitely on and running? I see the throttle being advanced, but it's not 100% clear that the engine is running. What...

The trim routine will adjust the throttle while trying to calculate a trim solution. So it doesn't matter what you set the throttle position to. But as I mentioned, I'm...

Take a look at this example of using the `` element. https://github.com/JSBSim-Team/jsbsim/blob/4b3ec67e2fffde5797b7fc168a686f2f08c4971d/aircraft/737/rudder_kick_init.xml#L11 The -1 means all engines that the aircraft has.

Well then there is something wrong with your engine, thruster model etc. With that sort of maximum thrust and a vehicle with a mass of only 3lbf, the trim routine...

No, no, no.... As I mentioned, the trim routine will try different throttle commands when trying to calculate a trim solution, so it doesn't matter what you set the throttle...

Compare the amount of thrust you're seeing to the thrust measured for this engine for different propellers etc. https://www.innov8tivedesigns.com/images/specs/Cobra_2217-8_Specs.htm

Step through the JSBSim code where it calculates the thrust and see if you spot what input is making it so large.