{"product_id":"douglas-xb-42-mixmaster-aircraft-manuals-collection-digital-download","title":"Douglas XB-42 Mixmaster Aircraft Manuals Collection - Digital Download","description":"\u003cp\u003eThe Douglas XB-42 \"Mixmaster\" was an experimental, high-speed medium bomber designed during WWII to achieve heavy-bomber ranges without the size or cost, utilizing an innovative, highly streamlined pusher-propeller configuration.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDefinitive Collection with Free Lifetime Updates:\u003c\/strong\u003e This is a living collection that we continuously expand and refine. As we acquire additional XB-42 documentation, technical bulletins, or variant-specific materials, we update this collection and provide free lifetime updates to all purchasers. Your one-time purchase guarantees access to all future additions and improvements to this collection.\u003c\/p\u003e\n\n\u003ch3\u003eHistorical Note\u003c\/h3\u003e\n\u003cp\u003eThe Douglas XB-42 \"Mixmaster\" represented one of the most innovative bomber designs of World War II. Conceived to deliver heavy-bomber range and payload without the size, weight, or cost penalties of conventional multi-engine bombers, the XB-42 employed a radical pusher-propeller configuration that eliminated drag from external engine nacelles. Two Allison V-1710 V-12 engines were installed inside the fuselage behind the crew cabin, driving 3-bladed contra-rotating propellers at the tail through long drive shafts.\u003c\/p\u003e\n\n\u003cp\u003eThe aircraft featured a laminar-flow airfoil and cruciform tail with a prominent ventral fin that served as a bumper to protect the propellers during high-angle takeoffs and landings. Early testing revealed instability and excessive yaw, leading to tail and rudder extensions that improved stability. The first prototype's engines produced 1,325 hp at takeoff with a 1,800 hp war emergency rating, while the second prototype received upgraded engines producing 1,675 hp at takeoff and 1,900 hp for war emergency power.\u003c\/p\u003e\n\n\u003cp\u003ePerformance was impressive: the XB-42 achieved a maximum speed of 410 mph at 23,440 ft, with a cruising speed of 312 mph and a service ceiling of 29,400 ft. On December 8, 1945, the second prototype set a transcontinental speed record from Long Beach to Washington D.C., covering the distance in 5 hours, 17 minutes, averaging 433.6 mph. Normal range was 1,800 miles, extending to 5,400 miles with additional fuel tanks in the bomb bay.\u003c\/p\u003e\n\n\u003cp\u003eDespite its high speed and innovative design, the XB-42 suffered from significant vibration issues caused by the long propeller drive shafts, challenging engine cooling, and poor controllability at low speeds. The first prototype was later modified to the XB-42A, adding two Westinghouse 19XB-2A turbojets under the wings to test mixed propulsion, reaching 488 mph. However, as the military shifted focus to pure jet bombers like the B-45, the XB-42 program was cancelled. Only two prototypes were built, making this one of aviation's most fascinating experimental designs.\u003c\/p\u003e\n\n\u003ch3\u003eManuals Included in This Collection\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDouglas XB-42 Aircraft Pilots Handbook Flight Operation Instructions Manual, 1945\u003c\/li\u003e\n\u003cli\u003eDouglas XB-42 MX-392 Aircraft Erection and Maintenance Instructions Manual, 1944\u003c\/li\u003e\n\u003cli\u003eDouglas XB-42A Aircraft Pilots Handbook Flight Operation Instructions Manual, 1944\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis collection provides comprehensive coverage of both the original XB-42 and the jet-augmented XB-42A variant, spanning flight operations, maintenance procedures, and erection instructions from the mid-1940s test program.\u003c\/p\u003e\n\n\u003ch3\u003eEngineering Norms and Standards\u003c\/h3\u003e\n\u003cp\u003eThe XB-42 was developed under U.S. Army Air Forces experimental aircraft specifications during World War II. Key engineering features included:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAerodynamic Design:\u003c\/strong\u003e Laminar-flow airfoil designed to minimize drag and maximize speed efficiency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePusher Configuration:\u003c\/strong\u003e Contra-rotating propellers driven by buried engines to eliminate nacelle drag\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowerplant:\u003c\/strong\u003e Two Allison V-1710-125 liquid-cooled engines with air intakes in the wing leading edge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTail Configuration:\u003c\/strong\u003e Cruciform tail with extended rudder and ventral fin for stability and propeller protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Systems:\u003c\/strong\u003e Explosive charge to jettison propeller assembly for emergency crew bail-out\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArmament:\u003c\/strong\u003e Two forward-firing .50-inch machine guns plus two retractable rear-firing twin turrets on wing trailing edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Wingspan 70 ft 6 in; Length 53 ft 8 in; Height 18 ft 10 in (later increased)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeights:\u003c\/strong\u003e Empty weight 20,888 lb; Maximum loaded weight 35,702 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFormat and Delivery\u003c\/h3\u003e\n\u003cp\u003eAll manuals are delivered as high-resolution PDF files via instant digital download upon purchase. Files are optimized for both screen viewing and printing, compatible with all modern devices (Windows, Mac, iOS, Android). Documents are organized in a clear folder structure for easy reference.\u003c\/p\u003e\n\n\u003ch3\u003eDisclaimer\u003c\/h3\u003e\n\u003cp\u003eThese manuals are provided for historical reference, research, and educational purposes only. They represent the original factory documentation from the 1940s test program. This digital compilation, structure, indexing and presentation are © Sicuro Publishing.\u003c\/p\u003e","brand":"Online Aviation Library","offers":[{"title":"Default Title","offer_id":52599547003227,"sku":null,"price":35.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4788\/3867\/files\/douglas-xb-42-mixmaster-lb4-banner-1.png?v=1773669787","url":"https:\/\/onlineaviationlibrary.com\/products\/douglas-xb-42-mixmaster-aircraft-manuals-collection-digital-download","provider":"Online Aviation Library","version":"1.0","type":"link"}