Radius of opening:
	Best guess = 1.25
	High = 1.26
	Low = 1.24

Area of opening:
	Best guess = 4.91 sq. cm
	High = 4.99 sq. cm
	Low = 4.83 sq. cm

So, in theory: 
	4.91 sq. cm : 0.9599L/s : : 2.455 sq. cm : .4800L/s