Flow instruments are sets of apparatuses made to give quantification of fluid movement. We are to design Pitot-static system and inclined multi-tube manometer, both of which are pressure-based flow instruments designed to meet the following objectives:
1. To attain ready-to-read airspeed measurement for pitot-static system
2. To be able to measure pressure distribution for multi-tube manometer
3. To prepare these instrument for demonstration and study at aeronautical lab
4. Must be beneficial to future generation of students in their research
Both instrument heavily relies on Bernoulli’s principle to operate. Pitot-Static system collects static pressure and stagnation pressure to derive dynamic pressure which can be related to airspeed. The design aspect includes pitot-static tube and ready to read scale. The ready-to-read scale utilises fluid theory to give airspeed measurement. Multi-tube manometer uses column liquid to measure and indicate pressure. The type of pressure measured is called gauge pressure which is the difference of absolute and atmospheric pressure. One end would measure pressure of interest, while the other measure reference pressure. Results are recorded in height which can be used derive absolute pressure. Fluid static theory is heavily used for the operation of multi-tube manometer.These instruments will be good learning devices for upcoming generations of students to come, and can also assist them in their research in the field of aeronautical engineering.