Let us see what are the sections propellers, blade sections? Can you see this, is it visible? The
most commonly used propeller blade sections are the ones that are shown under b) hereaerofoil
sections. Aerofoil sections have been very well studied over the years for their
characteristics, for angled flow on to the aerofoil sections and how they behave, and large
amount of data is available. These sections are considered to be just suitable for generation of
lift; we will see how a lift is generated later on.