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PZL Foka
P.Z.L. WS Foka ( pl, Seal) was a family of Poland, Polish air-cooled V-engines of the late 1930s. The Foka A was an 8-cylinder engine initially designed by Stanisław Nowkuński for the modern P.Z.L. P.38 Wilk fighter-bomber and P.Z.L. P.39 fighter, it was to start a family of high-performance engines for other types of Polish warplanes as well.Glass, pp. 10-11 The initial series was to achieve roughly of power and eventually reach . However, following the designer's death in 1936, the development met a number of serious setbacks. Taken over by a new team of designers, the basic problems with vibrations, overheating and high fuel consumption.Paweł, ¶ "Jaką masę przyjąć do obliczeń?" By the time one of the early prototypes was installed in the second prototype of P.Z.L. P.38 Wilk, the engine provided only around . As P.Z.L. P.38 also had other serious issues, both projects were eventually cancelled after only 8 prototypes had been completed. The successor to Foka A was Foka ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft
A WikiProject, or Wikiproject, is a Wikimedia movement affinity group for contributors with shared goals. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within sister projects such as Wiktionary, Wikiquote, Wikidata, and Wikisource. They also exist in different languages, and translation of articles is a form of their collaboration. During the COVID-19 pandemic, CBS News noted the role of Wikipedia's WikiProject Medicine in maintaining the accuracy of articles related to the disease. Another WikiProject that has drawn attention is WikiProject Women Scientists, which was profiled by '' Smithsonian'' for its efforts to improve coverage of women scientists which the profile noted had "helped increase the number of female scientists on Wikipedia from around 1,600 to over 5,000". On Wikipedia Some Wikipedia WikiProjects are substantial enough to engage in cooperative activities with outside organizations relevant to the field at issue. For e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinniped
Pinnipeds (pronounced ), commonly known as seals, are a widely distributed and diverse clade of carnivorous, fin-footed, semiaquatic, mostly marine mammals. They comprise the extant families Odobenidae (whose only living member is the walrus), Otariidae (the eared seals: sea lions and fur seals), and Phocidae (the earless seals, or true seals). There are 34 extant species of pinnipeds, and more than 50 extinct species have been described from fossils. While seals were historically thought to have descended from two ancestral lines, molecular evidence supports them as a monophyletic lineage (descended from one ancestral line). Pinnipeds belong to the order Carnivora; their closest living relatives are musteloids (weasels, raccoons, skunks, and red pandas), having diverged about 50 million years ago. Seals range in size from the and Baikal seal to the and southern elephant seal male, which is also the largest member of the order Carnivora. Several species exh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
