I have a bixler 2 just starting to fly ,I like to take it up and glide down. When I'm gliding I hear the prop turning wondering if that is causing a significant amount of drag should I look for a folding prop and if so what one to get
A turning prop will produce drag, I doubt on the Bixler it is that significant. The Bixler is a low drag plane but compared to a sail plane, it still has a lot of drag. Sail planes are super refined to reduce drag, a spinning prop would kill their performance.