Table 3.

Roughness average—Ra values.

Side	Direction	Point	Ra
			µm
Pressure	Cordwise	1	9.38
		2	5.45
		3	5.21
	Spanwise	1	8.4
		2	7.42
		3	4.91
Suction	Cordwise	1	5.61
		2	6.37
		3	5.92
	Spanwise	1	7.51
		2	5.12
		3	4.01