BRL Academy Series 306 Tarrant Hydraulic Slide Rule

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Country of manufacture: England,            Date of manufacture: ____
Overall length: 28.8 cm,          Width: 4.7 cm,           Weight: 70.7 gms
Materials: plastic (PVC) stators and slide, plastic end braces glued onto back
Cursor: 3.5 X 5.0 X 0.4 cms; all plastic; lines = single line,front only
Scales: 18, specialized
Front: A, Flow (Cu. Meters/Hr), Flow (Cu. Feet/Sec) [ A1/Pipe Diam (inches), Pipe Diam (Meters), Head Lost (Meters), Diameter (Meters), Head Lost (Feet), C1, Diameter (Inches) ] Length of Pipe (Ft), Velocity (Ft/Sec), Length of Pipe (Meters), Velocity (M/Sec), Proportional Flow, Proportional Velocity, Proportional Depth, Proportional Depth
Back: blank, except for copyright attribution
Gauge Marks: [       ]
Condition: C2-C3 (Mint to Very Minimal signs of use)
Came with: Original gray cardboard box (labeled: "Tarrant Hydraulic Slide Rule, supplied by Patterson Egineering Company, Limited, Kingsway, London
Notes: Calculates flow in pipes and circular sewers using the Hazen-Williams formula.

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