{"product_id":"blohm-voss-bv-138-seedrache-manuals-collection","title":"Blohm \u0026 Voss BV 138 Seedrache Manuals Collection","description":"\u003cp\u003eThe Blohm \u0026amp; Voss Bv 138 \u003cem\u003eSeedrache\u003c\/em\u003e (Sea Dragon) — nicknamed the \u003cem\u003eFliegender Holzschuh\u003c\/em\u003e (Flying Clog) — was Germany's principal long-range maritime reconnaissance flying boat of World War II. Distinguished by its twin-boom configuration, gull-wing layout, and three Junkers Jumo 205D diesel engines, the Bv 138 conducted extended patrols across the North Atlantic, Arctic, and Baltic theatres, often refueling from U-boats to sustain 18-hour endurance missions. This structured collection assembles 14 original technical documents covering the Bv 138 B-1 and C-1 production variants, their armament systems, and associated recognition and photographic reference materials.\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 Bv 138 documentation, aerodynamic studies, 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\u003ch2\u003eHistorical Note\u003c\/h2\u003e\n\u003cp\u003eDesign work began at Hamburger Flugzeugbau (later Blohm \u0026amp; Voss) in the mid-1930s under the designation Ha 138. Early prototypes suffered severe instability and inadequate lift, forcing a comprehensive redesign of the wing, hull, and tail surfaces. The definitive Bv 138C-1 introduced an extended hull with a characteristic hydrodynamic \"beak\" at the stern, increased wing dihedral, and structural reinforcement to withstand open-ocean operations in heavy seas. The high-mounted central engine with a four-bladed propeller and the gull-wing configuration were retained from the redesign as key stability solutions. A specialized minesweeping variant — the Bv 138 MS \"Mausi\" — was developed with an electromagnetic degaussing ring encircling the hull and wings to detonate magnetic mines. Some aircraft were also equipped with FuG 200 \u003cem\u003eHohentwiel\u003c\/em\u003e maritime search radar and Walter RATO rocket boosters for heavy-load departures. Approximately 279 aircraft were built across all variants, serving primarily with Küstenfliegergruppen until 1944–45.\u003c\/p\u003e\n\n\u003cp\u003eFor a detailed historical overview, visit our dedicated article: \u003ca href=\"https:\/\/onlineaviationlibrary.com\/blogs\/news\/bv-138-seedrache\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eBlohm \u0026amp; Voss Bv 138 Seedrache — Online Aviation Library Blog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eManuals Included in This Collection\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eVariant B \u0026amp; C — 7 Documents\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBv 138 B-C Aircraft Handbook\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBv 138 B-1, C-1 — Aircraft Handbook 1941, \u003cem\u003eFlugzeug-Handbuch\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003cli\u003eBv 138 B-1, C-1 — Aircraft Handbook 1944, \u003cem\u003eFlugzeug-Handbuch\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eBv 138 B-C Armament\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBv 138 B-1, C-1 — Firearms Installation Operating Instructions, \u003cem\u003eBedienungsvorschrift Wa Schußwaffenanlage\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eBv 138 B-C Flight Manual\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBv 138 B-1, C-1 — Flight Operating Instructions Manual, \u003cem\u003eBedienungsvorschrift Fl\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eBv 138 B-C Operating Instructions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBv 138 B-1 — Short Operating Manual, \u003cem\u003eKurzbetriebsanleitung\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003cli\u003eBv 138 B-1, C-1 — Short Operating Manual, \u003cem\u003eKurzbetriebsanleitung\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eBv 138 B-C Slides, Photos and Brochures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBv 138 B-1, C-1 — Aircraft Instructional Image Series, \u003cem\u003eLehrbildreihe\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNon-Variant Manuals — 7 Documents\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBv 138 Armament\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMG 131 Heavy Machine Gun Weapon Manual, \u003cem\u003eMG 131 Waffen-Handbuch\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003cli\u003eMG 151 Aircraft Cannon Weapon Manual, \u003cem\u003eMG 151 Waffen-Handbuch\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003cli\u003eETC 50\/VIII b and d Bomb Release Device Description Manual, \u003cem\u003eETC 50\/VIII b LDv 167\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eBv 138 Slides, Photos and Brochures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBv 138 — Series of Photographs, \u003cem\u003eBilddokumentation\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003cli\u003eBv 138 — Aircraft Recognition Charts, \u003cem\u003eFlugzeug-Erkennungsdienst\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003cli\u003eBv 138 — Technical Drawing Sheet, \u003cem\u003eZeichnungen\u003c\/em\u003e (German Language)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe collection spans aircraft handbooks, flight and operating instructions, armament manuals for the MG 131, MG 151, and ETC 50 bomb release system, plus photographic, recognition, and technical drawing references — covering the full operational and maintenance documentation scope of the Bv 138 B and C series.\u003c\/p\u003e\n\n\u003ch2\u003eEngineering Norms and Standards\u003c\/h2\u003e\n\u003cp\u003eDocumentation reflects Luftwaffe technical standards and Blohm \u0026amp; Voss engineering practices of the 1938–1945 period. Materials reference RLM (Reichsluftfahrtministerium) structural and airworthiness specifications, Junkers Motorenwerke engineering norms for the Jumo 205D opposed-piston diesel series (880 hp per engine, glycol \"hot cooling\"), and Kriegsmarine operational requirements for extended maritime patrol endurance. Performance parameters documented include maximum speed 285 km\/h at sea level, cruising speed 250 km\/h at 1,000 m, maximum range 4,300 km \/ 18 hours, service ceiling 5,000 m, and maximum takeoff weight 17,650 kg. Structural reports address twin-boom flying boat design under open-ocean operational loads, hull hydrodynamics, water takeoff and landing stresses, and RATO system integration.\u003c\/p\u003e\n\n\u003ch2\u003eFormat and Delivery\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInstant digital download — PDF format, print-friendly\u003c\/li\u003e\n\u003cli\u003eOrganized folder hierarchy by document type and variant\u003c\/li\u003e\n\u003cli\u003eCompatible with all standard PDF readers on desktop, tablet, and mobile\u003c\/li\u003e\n\u003cli\u003eCurated and indexed for research and restoration reference\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eThis collection is provided for historical research and archival reference only. These are wartime-era technical documents; consult qualified aviation professionals for any airworthiness or restoration decisions. Trade names and designations are the property of their respective owners. This digital compilation, structure, indexing and presentation are © Sicuro Publishing.\u003c\/em\u003e\u003c\/p\u003e","brand":"Online Aviation Library","offers":[{"title":"Default Title","offer_id":52664137777499,"sku":null,"price":65.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4788\/3867\/files\/bv-138-lb4-banner-j2f-style.png?v=1775140535","url":"https:\/\/onlineaviationlibrary.com\/products\/blohm-voss-bv-138-seedrache-manuals-collection","provider":"Online Aviation Library","version":"1.0","type":"link"}