I use to have a problem with those lockeed, some minutes after take off, engines use to swicht off and no way to restart them, I had a look on the manual, but not way, my flies use to end in a crash unless I do not deactive a gauge on the panel just after take off!!!
Sorry I didn't want to menospreciate your work, but I tried ABSimulations one and is much better than thisone. You should take my comment as a challenge on your next work. Regards