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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Studies in the History of Science and Technology</journal-id><journal-title-group><journal-title xml:lang="en">Studies in the History of Science and Technology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы истории естествознания и техники</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0205-9606</issn><issn publication-format="electronic">2713-041X</issn><publisher><publisher-name xml:lang="en">Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">699419</article-id><article-id pub-id-type="doi">10.7868/S2713041X25060105</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Sources for the History of Science and Technology</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Источники по истории науки и техники</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">AERONAUTICAL ENGINEER I. I. SIKORSKY'S CORRESPONDENCE WITH E. A. VECHORIN IN THE COLLECTIONS OF THE BAKHMETEFF ARCHIVE AT COLUMBIA UNIVERSITY (NEW YORK, USA)</article-title><trans-title-group xml:lang="ru"><trans-title>ПЕРЕПИСКА АВИАКОНСТРУКТОРА И. И. СИКОРСКОГО С ИНЖЕНЕРОМ Е. А. ВЕЧОРИНЫМ В ФОНДАХ БАХМЕТЕВСКОГО АРХИВА КОЛУМБИЙСКОГО УНИВЕРСИТЕТА</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Uliankina</surname><given-names>T. I</given-names></name><name xml:lang="ru"><surname>Ульянкина</surname><given-names>Т. И</given-names></name></name-alternatives><email>tatparis70@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">S. I. Vavilov Institute for the History of Science and Technology, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт истории естествознания и техники им. С. И. Вавилова РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2025</year></pub-date><volume>46</volume><issue>4</issue><issue-title xml:lang="en">VOL 46, NO4 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 46, №4 (2025)</issue-title><fpage>790</fpage><lpage>805</lpage><history><date date-type="received" iso-8601-date="2025-12-25"><day>25</day><month>12</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-12-24"/></permissions><self-uri xlink:href="https://journals.eco-vector.com/0205-9606/article/view/699419">https://journals.eco-vector.com/0205-9606/article/view/699419</self-uri><abstract xml:lang="en"><p>A collection of documents of Yevgeny Aleksandrovich Vechorin (1884–1969), engineer at the Russo-Baltic Wagon Works (RBVZ), ensign-mechanic of the squadron of Ilya Muromets heavy bombers, and a Russian first-wave émigré, is deposited in the Bakhmeteff Archive of Russian and East European History and Culture (Rare Books and Manuscripts Department of the Butler Library, Columbia University, NY). In France, he was known as a chairman of the Paris Association of Former Professors and Students of the Emperor Peter the Great St. Petersburg Polytechnic Institute. In the Bakhmeteff Archive, the author of this article discovered the previously unpublished correspondence between Vechorin and Igor Ivanovich Sikorsky (1889–1972), the legendary aircraft engineer, inventor and founder of the world’s helicopter industry, scientist, entrepreneur, philosopher and public figure, one of the “spiritual leaders of Russian emigration, the pride of Russia in exile”. The content of some letters deserves particular attention, as it supplements Sikorsky’s biography with personal recollections, little-known details of his life, in particular, those concerned with his friendship with General Major Mikhail Vladimirovich Shidlovsky (1856–1921), Chairman of the RBVZ Board, who was arrested in 1919 and shot in 1921.</p></abstract><trans-abstract xml:lang="ru"><p>В Архиве русской и восточно-европейской истории и культуры отдела редких книг и рукописей Баглеровской библиотеки Колумбийского университета в Нью-Йорке (США), известном среди историков как «Бахметевский архив», хранится фонд инженера Евгения Александровича Вечорина (1884–1969), работавшего на Русско-Балтийском вагоностроительном заводе и покинувшего Россию в составе так называемой «первой (постреволюционной) волны» эмиграции. В русском зарубежье он был известен как председатель Парижского объединения бывших выпускников Санкт-Петербургского политехнического института. В документах фонда автором статьи обнаружена ранее не публиковавшаяся переписка Вечорина с легендарным авиаконструктором, изобретателем и основателем мирового вертолетостроения, ученым, предпринимателем, философом и общественным деятелем Игорем Ивановичем Сикорским (1889–1972), одним «из духовных лидеров русской эмиграции, гордостью России в изгнании». Содержание некоторых писем заслуживает особого внимания, поскольку дополняет биографию Игоря Ивановича личными воспоминаниями, малоизвестными деталями его жизни, в частности касающимися его дружбы с председателем совета Акционерного общества «Русско-Балтийский вагонный завод», генерал-майором Михаилом Владимировичем Шидловским (1856–1921), арестованным в 1919 г. и расстрелянным большевиками в 1921 г.</p></trans-abstract><kwd-group xml:lang="en"><kwd>I. I. Sikorsky</kwd><kwd>M. V. Shidlovsky</kwd><kwd>E. A. Vechorin</kwd><kwd>history of Russian aircraft engineering</kwd><kwd>Russo-Baltic Wagon Works</kwd><kwd>first-wave Russian scientific and engineering emigration</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>И. И. Сикорский</kwd><kwd>М. В. Шидловский</kwd><kwd>Е. А. Вечорин</kwd><kwd>история отечественного авиастроения</kwd><kwd>Бахметевский архив в Нью-Йорке</kwd><kwd>Русско-Балтийский вагонный завод</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Guchkov Aleksandr Ivanovich [Guchkov, Aleksandr Ivanovich] (1993), in: Volobuev, P. V. (ed.) Politicheskie deiateli Rossii, 1917: biograficheskii slovarʼ [Political Figures of Russia, 1917: A Biographical Dictionary]. Moskva: Nauchnoe izdatelʼstvo “Bolʼshaia rossiiskaia entsiklopediia”, pp. 92–94.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Katyshev, G. I., and Mikheev, V. R. 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