The YB-29 was an improved XB-29 and 14 were built for service testing. Testing began in the summer of 1943, and dozens of modifications were made to the planes. The engines were upgraded from Wright R-3350 -13s to R-3350-21s. Where the XB-29 had three-bladed props, the YB-29 had four-bladed propellers.

Jun 18, 2023 · The YB-29 was a service test aircraft, meaning that it was used to test the performance and capabilities of the aircraft in a service environment, rather than being an experimental prototype. This was the usual process at the time, with experimental prototypes being designated with an “X” and service test aircraft being designated with a “Y.”

ERCO Nose-Mounted Ball Turret: The YB-29 Escorter featured an experimental nose-mounted turret armed with two .50-cal machine guns. Side-Mounted Emerson Model 126 Barbettes: Four remotely-controlled barbettes (two forward of the wings and two replacing the aft gunner blisters) were installed, each armed with two .50-cal machine guns.

Oct 19, 2020 · One of the most technologically advanced airplanes of World War II, the B-29 had many new features, including guns that could be fired by remote control. Two crew areas, fore and aft, were pressurized and connected by a long tube over the bomb bays, allowing crew members to crawl between them.

Aug 14, 2024 · In this article, we will explore five notable variants of the B-29: XB-29, YB-29, B-29A, B-29D, and KB-29 Aerial Tanker. The XB-29 was the experimental prototype that laid the foundation for the iconic Superfortress bombers. Developed and tested by the Army Air Corps, only three units of the XB-29 were built.

Nov 10, 2023 · 内容提示： 日 期旧 底 图 总 号签 字底 图 总 号借( ( 通) ) 用 件 登 记描 校描 图更 改 文 件 号校 校 核工 工 艺审 审 核标 记设 设 计处 数重 重 量3030080欧 式 箱 变 地 基 图YB29-500kVA标 准 化审 审 定日 日 期日 日 期 签 字共 张图 图 样 样 标 标 记百 叶 窗( ( 镀 锌 板) )150第 …

Boeing B-29B was a modification of the basic B-29 design for use in the Pacific during World War II for low-level bombing raids against Japan.

YB29-40.5/12高压/低压预装式变电站系上级电压40.5kV,下级电压12kV(7.2)三相交流50Hz户外 成套设备，普遍适用于城市、乡镇、工厂及油田等场所，也适用于一些大型建设工地，作为接受、

YB29-40.5/12高压/低压预装式变电站系上级电压40.5kV,下级电压12kV (7.2)三相交流50Hz户外成套设备。 变电站总体采用H形布置方式，由35kV开关设备室、10kV开关设备室、自动控制室、变压器等组成。 控制室依具体情况和 35kV 或 10kV 开关室组成一个箱体，另外一个开关室组成一个箱体，变压器置于室外，并通过一定的防护和间隔形成变压器安装区。 变压器至两开关之间通过架室母线或电缆线连接。 箱体一般采用优质钢板经表面防腐和喷涂处理后组成，中间加以隔热 …

YB29-35.0.315光伏华变分为高压室，低压室以及变压器三个部分，按照“目”字型排列。 除变压器散热片和器身敞露在箱体外部，其余所有带电间隔均密封在独立的隔室内。 各室内用隔板隔离成独立的间隔，并在箱体内设有下人孔，方便安装及维修。 箱体内外表面平整，无锈蚀、涂层脱落和磕碰损伤现象，涂料层牢固均匀，无明显反差反光。 箱休其座和所有外露金属件均进行防腐，防锈处理，并喷涂耐久的防护层。 箱体顶盖装设防雨的索封盖板和防雨槽，双层结构的箱体顶盖能 …