Imagine that you have designed a low speed airplane with a maximum velocity at sea level of 90 m/s. For your airspeed instrument, you plan to use a venture tube with a 1.3:1 area ratio. Inside the cockpit is an airspeed indicator- a dial that is connected to a pressure gauge sensing the venturi tube pressure difference P1 – P2 and properly calibrated in terms of velocity. What is the maximum pressure difference you would expect the gauge to experience?
