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13869350
Wall Art and Photo Gifts from Mary Evans Picture Library
13869350
Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries
Media ID 32315762
© Aviation Ancestry
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VISUAL DESCRIPTION
The image shows a vintage document titled "Mamba memoranda No 4, " which appears to be an informational or promotional sheet related to aircraft engines. The top half of the page features two sections under the heading "ABSENCE OF VIBRATION. " On the left, there is text about "RECIPROCATING ENGINE" with a subtext that reads, "Vibrations are reduced by balance and 'firing order' reducing stresses for minimum vibration. " On the right, it discusses "TURBINE ENGINE" with a note stating, "Correct rotor assembly ensures perfect balance - no action required and no vibration. " Below these descriptions is an illustration of what seems to be part of an aircraft engine—possibly a turbine—with various components labeled. At the bottom of the page is printed: ARMSTRONG SIDDELEY MOTORS LIMITED Parkside, Coventry. A branch of the Hawker Siddeley Group. This document likely serves as technical literature from Armstrong Siddeley Motors Limited aimed at highlighting their engineering expertise in minimizing vibrations in different types of aircraft engines.
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