Launch her like you are holding a tray on the underside and high. The with FULL throttle just push her upwards hard/forcefully. Then let her climb. Mine was only giving me about 70 mph on a level pass. No way it is going to hit 85 mph! I find the stock prop is best. Tried the APC props and they were not impressive. You want good fun? I used my Tazz set up with a Multiplex Microjet, that is fast!

I love the Zagi when you catch a thermal, she will just float all day up there. Very nice flying wing.