Speed for a friction-dominated head target calculator

Required speed at the target head is calculated as N1 × sqrt(H2/H1). Use the stated system boundary and matching input units.

Units

N_{2} = N_{1} \times \sqrt{\frac{H_{2}}{H_{1}}}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Given

N_{2} = 100 \times \sqrt{\frac{33.33333333}{50}} \approx 81.65

Symbol	Meaning	Unit
$N_{2}$	required speed at the target head	rpm
$N_{1}$	reference speed	rpm
$H_{1}$	reference head	ft
$H_{2}$	target head	ft

Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.