The Tunnel consists of bell mouth shaped entry to guide the air smoothly into settling chamber and stabilizes the air flow this follows working section for test section where various models can be tested. Test section with acrylic sheet, will be provided for visual observation. Working section is followed by diffuser section which reduces the dynamic pressure at the exit. A fan coupled with motor is used to produce desired wind velocity. The present set-up has a facility to interface the system with computer which enables to log the experimental data using computer.