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Сообщение: <blockquote data-quote="rousseau" data-source="post: 311391" data-attributes="member: 5391">Dear Sir:Your statement is right, which only based on the condition that section of rectangular nozzle is same as that section of circular nozzle. But have you ever seen there is no way to make equal section on rectangluar nozzle and circular nozzle to both up to now. The F119's rectangular nozzle is an excircle or say the engine is circumscirbed by the rectangualr nozzle. So the perimeter of the rectangualr nozzle is longer than original one.So your stand is untanable.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite38" alt=":oops:" title="Oops!    :oops:" loading="lazy" data-shortname=":oops:" /></blockquote>