{"id":9748,"date":"2025-10-16T13:04:11","date_gmt":"2025-10-16T18:04:11","guid":{"rendered":"https:\/\/flymall.org\/blog\/?p=9748"},"modified":"2025-10-16T13:04:11","modified_gmt":"2025-10-16T18:04:11","slug":"rail-diesel-cars","status":"publish","type":"post","link":"https:\/\/flymall.org\/blog\/2025\/10\/rail-diesel-cars\/","title":{"rendered":"Rail Diesel Cars"},"content":{"rendered":"\n<p>Rail Diesel Cars, commonly known as RDCs or Budd Cars, hold a nostalgic place in American transportation history. In 1949, the Budd Company, owned by Edward G. Budd, introduced the first RDC prototype at Union Station in Chicago. RDCs offered a fast and affordable way to travel, commute, and transport U.S. Postal Service mail. Unique for their time, RDCs were self-propelled, each equipped with two diesel engines and exhaust pipes centrally located on the car.<\/p>\n\n\n\n<p>From 1949 to 1962, a total of 398 units were built and used on rail lines worldwide. With commuting by train declining after World War II and railroads struggling to retain passengers, RDCs presented a more economical alternative to traditional passenger cars. The Budd Company developed four primary models (RDC-1, RDC-2, RDC-3, and RDC-4), plus a less common RDC-9 variant. The RDC-1, -2, and -3 models measured 85 feet in length and offered various combinations of passenger, baggage, and mail capacity. The RDC-4, at 73 feet, was designed exclusively for mail and baggage, while the RDC-9, an 85-foot model with a single engine, was not independently operable.<\/p>\n\n\n\n<p>Each RDC had operator vestibules at both ends (except the RDC-9) with connecting doors, allowing for easy operation back and forth or linking multiple cars together. Stairs enabled boarding from both low-level rural platforms and high urban platforms. Lighter than traditional passenger cars, RDCs could be operated by a two-person crew.<\/p>\n\n\n\n<p>Some facts about RDC:<\/p>\n\n\n\n<ul><li><strong>RDC-1<\/strong>\u00a0\u2014 passengers only, 90 seats<\/li><li><strong>RDC-2<\/strong>\u00a0\u2014 passengers and baggage, 70 seats (<em>pictured right<\/em>)<\/li><li><strong>RDC-3<\/strong>\u00a0\u2014 passengers, baggage, and a dinette, 49 seats<\/li><li><strong>RDC-4<\/strong>\u00a0\u2014 used only for Rail Post Office and baggage<\/li><li><strong>Truck Design<\/strong>\u00a0\u2014 Each RDC sits on two twin-axle trucks<\/li><li><strong>Engine Placement<\/strong>\u00a0\u2014 Diesel engines are located underneath and drive the inner axle of each truck via a drive shaft<\/li><li><strong>Power Generation<\/strong>\u00a0\u2014 One engine drives a generator that provides light, heating, and air conditioning<\/li><li><strong>Cooling System<\/strong>\u00a0\u2014 Radiators for exhaust and cooling are housed in a roof enclosure<\/li><li><strong>Redundancy<\/strong>\u00a0\u2014 Engines operate independently so if one fails, the other can still propel the car<\/li><li><strong>Service Accessibility<\/strong>\u00a0\u2014 Engine placement allows for easy access for service and repair<\/li><\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rail Diesel Cars, commonly known as RDCs or Budd Cars, hold a nostalgic place in American transportation history. In 1949, the Budd Company, owned by Edward G. Budd, introduced the first RDC prototype at Union Station in Chicago. RDCs offered a fast and affordable way to travel, commute, and transport U.S. Postal Service mail. Unique [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[1],"tags":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p95FsX-2xe","jetpack-related-posts":[{"id":5143,"url":"https:\/\/flymall.org\/blog\/2021\/12\/kraemer-aviation-flymall-org-december-2021-wheels-wings-newsletter\/","url_meta":{"origin":9748,"position":0},"title":"Kraemer Aviation \/ Flymall.org December 2021 Wheels &#038; Wings Newsletter","date":"December 22, 2021","format":false,"excerpt":"Welcome to the Kraemer Aviation\/Flymall.org Wheels & Wings Newsletter. This month is all about pushing the limits. 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