Hello
I think ( if i'm reading it right ) DX diag tells me I got 16 gb of memory and on page 2 says about 12 gb. I'm sporting a AMD R9 390 card so it's pretty aged, my rig is about 7+ years. So the memory running out would probably be true in my case. I use a bunch of mods nowdays.( starting up takes a good 10 min) there's all so fun :) But my son of 4.5 years really wanted to have planes too, to fight the bugs :). Time for an upgrade. I tend to forget while Factorio is not super grafic demanding, there's a lot of copmuting behind it, with all the entieties and whatnot.
I installed all KJ planes, which needed aircraft realism
I also have helicpter revival and lex's aircraft which work without.
So thank you for your answer, now I know what I need to do. I have run into other 'old rig limitations' on recent games so this is just one of those.
greetings
Michael
ps: I have now one big bomber and one small bomber as active mod and it works. so My son will be happy, and that will do until I upgrade