convertaplane


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con·vert·a·plane

 (kən-vûr′tə-plān′)
n.
Variant of convertiplane.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Later in 1754 Mikhail Lomonosov has designed an axial impeller (figure 2.4) and in 1783 Bienvenue Launoy and a counter-model propeller (figure 2.5), based on the Chinese idea [4, 22], George Cayley designed a carriage convertaplane [1] which remained at the stage of idea due to the propulsion systems gauge which at that time were only available for steam locomotives (Figure 2.6).