Yes I know i have been really active for 6 months, or even uploaded anything for 1.5+ years, but i’ve been making a new plane design that is NOT my FD aircrafts. And the aircraft I am building reached Mach 4, which isn’t much compared to other builds (or warp engine someone made), though it started to get unstable reaching mach 5, if it weren't for instability on my part, could reach Mach 10 or more. And no it's not the Darkstar lol. This aircraft I'm making probably come out later this week or next week.