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Several different types of pump impellers Flexible impeller of cooling system pump of an outboard engine (1 euro cent coin for comparison, diameter 16.25 mm). An impeller is a rotating component of a centrifugal pump that accelerates fluid outward from the center of rotation, thus transferring energy from the motor that drives the pump to the fluid being pumped.
A centrifugal pump containing two or more impellers is called a multistage centrifugal pump. The impellers may be mounted on the same shaft or on different shafts. At each stage, the fluid is directed to the center before making its way to the discharge on the outer diameter. For higher pressures at the outlet, impellers can be connected in series.
Patrol Boat, Riverine, or PBR, is the United States Navy designation for a small rigid-hulled patrol boat used in the Vietnam War from March 1966 until 1975. They were deployed in a force that grew to 250 boats, the most common craft in the River Patrol Force, Task Force 116, and were used to stop and search river traffic in areas such as the Mekong Delta, the Rung Sat Special Zone, the Saigon ...
By 1922, Sherwood Foresters Old Comrades Association were looking for a site for a memorial for their many comrades who had died during the First World War. As the regiment was raised across the two counties of Nottinghamshire and Derbyshire, they wanted to find a site close to the boundary between the counties, and Crich Stand, whose view ...
The Belton Standpipe, in Belton, South Carolina, historically known as the Belton Waterworks Tower, is a 155-foot high concrete water tower located near the downtown area. Construction on the tower began in 1908 and was completed in 1909. [2] [3] It is the tallest of three standpipe water towers in the state. [4]
Sherwood Island State Park is a public recreation area on the shore of Long Island Sound in the Greens Farms section of Westport, Connecticut. [3] The state park offers swimming, fishing, and other activities on 238 acres (96 ha) of beach , wetlands , and woodlands .
Elizabeth D. Sherwood-Randall (née Sherwood; born October 4, 1959) [1] [2] is an American national security and energy leader, public servant, educator, and author who served as the 11th United States Homeland Security Advisor in the Biden administration from 2021 to 2025.
Grace White Sherwood (1660–1740), called the Witch of Pungo, is the last person known to have been convicted of witchcraft in Virginia.. A farmer, healer, and midwife, she was accused by her neighbors of transforming herself into a cat, damaging crops, and causing the death of livestock.