I hope to add the basic equations and correct a minor error: "calculated flow is dependent on the accuracy of the head, flow, and power measurements."-->"calculated flow is dependent on the accuracy of the head, efficiency, and power measurements." However as I'm new at this, I'll first ask if whoever first added this wiki is available to discussion? thx peter Parmstr (talk) 14:26, 12 November 2015 (UTC)