Will we be able to glide and rotate in the atmosphere with no power to the engines?

You can do that. Christopher can actually show it. The issue is more that a lot of the ships are like jet fighters. If you cut the engine in a Eurofighter in real life, it'll glide, but it's going to fall quite quickly and you don't really have that much time to do anything about it. So if you get up to speed and then you just cut the power, the ship will glide, but you'll end up crashing. There you go. Ship glides. It will do this for quite a while, and then... Yeah, it works. You just don't have that much control, and you will eventually crash.