Greetings, I recently joined this forum to get some feedback on this project I'm working and which I have searched for an answer without any luck. My goal is to get the most airflow velocity in an outlet of a ducted fan. I'm using a 20,000RMP fan that is pushing air from a ~1.25" inlet to a .20" outlet as seen from the attached picture of which I have built a quick physical model. However, to my dismay, I get little air coming out of the outlet and some coming from the front due most likely to turbulence. I'm using an electric motor set up similar to a turbojet engine such that the fan is in front of the motor. Reversing the polarity of the motor pushes the air towards the 1.25 opening so direction of rotation is not an issue. My concern is whether these dimensions are too crude to get any results. Note that this is not for flight but rather obtain the highest velocity in a .2" outlet. I presume that this could be made for flight with a variable outlet. Any insight would help.