Shuttle Challenge v6 - The STS thread [Stock and Mod Friendly] Now with RSS badges! in Challenges & Mission ideas Posted September 2 37 minutes ago, sturmhauke said: @pTrevTrevs, your carrier airplane looks just as good as your orbiter. The only question I have is whether you released the orbiter for the glide test at 5 km or above. Other than that, everything looks to be in order. To be honest I don’t remember, this was a few weeks ago. I’m pretty sure it was over 5000 meters though since I had a few minutes of free flight time from separation to touchdown.