After the StarCrash trailer, I looked for similar movies and look what I found!
It’s called Battle Beyond the Stars and even though it’s another blatant Star Wars ripoff, the trailer alone had a lot of cool elements (I think):
a) the sound effect of the TNG photon torpedo
b) the uterus-shaped ship that has already been discussed in another thread
c) a ship that looked like an old Cylon raider
d) Hannibal from the A-Team
All these cool B-movies were made in the 80s, I totally missed out on those, I think I’m gonna buy this one and StarCrash just for the fun of watching really bad scifi!