@Mickk I'm on high physics. Typically when a plan flies apart it's at low altitude where the air is densest. I put this thing through it's paces at it holds up and performs nicely. Maybe it's a platform issue? I'm on a PC.

@atgxtg Yes, I also found that it doesn't blow up.
I usually fly on low/mid myself, unless I am taking screen shots, so it could be that.

*goes back to work on the Valkyrie Heavy Fighter.

Odd, it doesn't blow up when I fly it. I've tired high speed down low, 1000mph at 65K and even a power dive with a pull up near the water. It's rock solid.

Some questions:
-What altitude does it blow up at?
-Do the wings start flexing wildly before it blows up?
-What Physics settings do you use?,
-Are you using the time warp mod?

@Vidal99977 He is on iOS. I don't think you can XML mod on iOS.
The aircraft exploding thing is probably due to using normal wings, which definitely have a speed limit.
One you get above a certain speed the wings start to wiggle/shake and eventually they 'break' and the rest is just 'boooom'.

Edit:Downloaded and looked at the wings. It is as I thought.

Download this --> https://www.simpleplanes.com/a/g3uDIy/structural-wing-with-control-surface-modded
Save it as an assembly and use it for making wings.
With this item, wings getting the wiggles/shakes will be a thing of the past AND you will be able to make them as big as you want without them sagging. ;)
@Bob1

Here @Bob1

I can help you

You need XML modding