Do you play with FAR or NEAR installed? Because it takes some serious engineering to create a low altitude supersonic plane in stock - supersonic boat would be a completely different level of challenge.
I was going to rant a bit about how ridiculing others for not knowing something/making a mistake/asking "dumb" questions is wrong (especially when the topic is out of their area of expertise), but now I don't have to - thank you. I completely agree with everything you wrote there.