Speed / Length vs. Displacement Length
		Formula
			S/L = 8.26 / ( D/L exp 0.311)
			227	D/L
			1.53	S/L
			1.72	S/L ratio from max displacement and SHP
			1.35	True S/L ratio from LWL
			These three S/L figures should be of "comparable magnitude".
			1.53	average of all three S/L figures
			0.13	average deviation of all three S/L figures
				Figures within limits
	If figures are out of limits some input data, i.e. number of motors, BHP or LWL is wrong or mismatched.
	Look at the S/L that is mis-matched in magnitude, and what it is calculated from to determine the error.