A friend of mine flies the DJ1 and the new DJ2 and it performs the same way as seen on the videos. It lifts from a short cutted grass runway. The critical thing on the Ducted fan unit is the proper adjustment of the engine and the length of the tuned pipe. You need to find the engines peak RPM to get this glow impeller planes up. Otherwise, the plane wont lift off. 10% Nitromethan is sufficient, but more is not necessarily better.