Wind tunnel is a device that artificially produces airflow relative to a stationary body and measures aerodynamic force and pressure distribution to simulate with actual conditions. Wind Tunnels offer a rapid, economical, and accurate means for aerodynamic research. An important aspect of wind tunnels is their ability to accurately simulate the full complexity of fluid flow. Small-to-medium sized wind tunnels are used in research laboratories for experimental and educational purposes. Though these are relatively smaller in size as compared to commercial wind tunnels, meeting their accurate and precise design and fabrication specifications is quite a tough task. This paper focuses on the design aspects of various wind tunnel components like the test section, contraction cone, diffuser, drive system and the settling chamber. It also discusses various manufacturing approaches considered in previous researches.