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Please let me remind all of you--this material is copyrighted. Though partially funded by NASA, it is still a private site. Therefore, before using our materials in any form, electronic or otherwise, you need to ask permission.
There are two ways to browse the site: (1) use the search button above to find specific materials using keywords; or,
(2) go to specific headings like history, principles or careers at specific levels above and click on the button. 
Teachers may go directly to the Teachers' Guide from the For Teachers button above or site browse as in (1) and  (2).

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PROPELLER TYPES

These photographs were taken by Cesar Levy at the National Air and Space Museum in August, 2003, as examples of propeller types used during the early aviation years.  Copyright of the photographs is to Cesar Levy 2003


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Updated: 12 March, 2004