K 059 a

From Figures 1 to 8 the following results are obtained.

2. Downsurge at midlength — (0.64)(220) — 141 ft

5. Maximum reverse speed — (1.45)(1760) — 2550 rpm

6. Time of flow reversal at pump — 3.5 L/a — 4.6 s

8. Time of maximum reverse speed — 10.0 L/a — 13.1 s

As noted in the discussion on pumps equipped with check valves, the upsurge, or head rise, at the pump above the normal head would have been about 202 ft if there were check valves at the pumps that closed at the time of flow reversal.

Survival Treasure

Survival Treasure

This is a collection of 3 guides all about survival. Within this collection you find the following titles: Outdoor Survival Skills, Survival Basics and The Wilderness Survival Guide.

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