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13883725
Wall Art and Photo Gifts from Mary Evans Picture Library
13883725
Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries
Media ID 32335672
© Aviation Ancestry
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VISUAL DESCRIPTION
Featured here is an old-fashioned advertorial explaining the workings of the Kelvin Sensitive Altimeter, a critical navigation aid used by pilots to determine altitude through air pressure measurement. With a cutaway illustration displaying its inner components, this document provides insight into how evacuated capsules translate atmospheric pressure changes into precise altitude readings on the dial. It also mentions temperature compensation as part of its sophisticated design—a testament to early efforts in creating accurate and reliable instrumentation for aviators navigating diverse weather conditions. This advertisement not only promotes Kelvin Bottomley & Baird Limited's product but also serves as an educational tool about altimeter mechanics.
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