{"product_id":"dewoitine-d-520-notice-descriptive-et-dutilisation-armee-de-lair-fighter-documentation","title":"Dewoitine D.520 — Notice Descriptive et d'Utilisation | Armée de l'Air Fighter Documentation","description":"\u003ch2\u003eDewoitine D.520 — Notice Descriptive et d'Utilisation\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eMinistère de l'Air · Armée de l'Air — Primary-Source Archival Edition\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eFrance's most capable fighter at the outbreak of the Second World War, the Dewoitine D.520 represented the pinnacle of SNCAM engineering under Émile Dewoitine — a masterful balance of aerodynamic refinement, liquid-cooled V12 power, and exceptional handling stability. This archival edition presents the original \u003cstrong\u003eNotice Descriptive et d'Utilisation de l'Avion de Chasse D.520 S\u003c\/strong\u003e, issued by the Ministère de l'Air \/ Armée de l'Air, together with the official \u003cstrong\u003eTableau des Caractéristiques\u003c\/strong\u003e data sheet.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eDocument Manifest\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNotice Descriptive et d'Utilisation — Avion de Chasse D.520 S, Moteur 12-Y45\u003c\/strong\u003e — Ministère de l'Air \/ Armée de l'Air, original issue. Covers airframe description, systems utilisation, and operational procedures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTableau des Caractéristiques — Avion D.520 S\u003c\/strong\u003e — Official characteristics data sheet. Covers: Forme, Spécifications et Emploi; Encombrement et Assiette de Garage (full dimensional data); undercarriage geometry; propeller ground clearance at all oleo coefficients.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eAirframe Geometry — From the Tableau des Caractéristiques\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnvergure maximum: \u003cstrong\u003e10 m 200\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eLongueur totale: \u003cstrong\u003e8 m 760\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHauteur totale (ligne de vol, train sorti): \u003cstrong\u003e3 m 390\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHauteur de l'axe hélice au-dessus du sol — Au repos, coefficient 1 (mi-course, ½ aplatiss.): \u003cstrong\u003e2,265 m\u003c\/strong\u003e | tout à plat: \u003cstrong\u003e2,030 m\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eEn ligne de vol, coefficient 1: \u003cstrong\u003e1,845 m\u003c\/strong\u003e | tout à plat: \u003cstrong\u003e1,615 m\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eGarde de l'hélice — Au repos, coefficient 1: \u003cstrong\u003e0,74 m\u003c\/strong\u003e | tout à plat: \u003cstrong\u003e0,465 m\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eEn ligne de vol, coefficient 1: \u003cstrong\u003e0,32 m\u003c\/strong\u003e | tout à plat: \u003cstrong\u003e0,09 m\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eAngle au sol (tangente à la roue \/ extrémité hélice, en ligne de vol, coefficient 1): \u003cstrong\u003e10°\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eType: Avion de chasse monoplace, monomoteur, refroidissement par liquide, monoplan cantilever à aile basse\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eAerodynamic Design \u0026amp; Airframe Engineering\u003c\/h3\u003e\n\u003cp\u003eThe SNCAM design team prioritised strict drag reduction to extract maximum velocity from a lower-horsepower engine. The wing adopted an all-metal, single-spar duralumin-skinned structure with a NACA 23012 airfoil profile on the vertical stabiliser to enhance tracking stability at high speeds.\u003c\/p\u003e\n\u003cp\u003eThe original prototype (D.520-01) suffered from severe engine overheating via dual underwing radiators. Aerodynamic revisions relocated the cooling apparatus into a single, aerodynamically clean under-fuselage bath, resolving boundary layer separation issues. Under the SNCASE design office in 1942, advanced aerodynamic modelling on D.520 No. 465 eliminated stray airframe drag trails — sealing manufacturing gaps and redesigning engine cowlings shaved 0.65 off the 100 Cx drag coefficient.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eEngine Technical Notes — Hispano-Suiza 12Y-45\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowerplant:\u003c\/strong\u003e Hispano-Suiza 12Y-45, 12-cylinder liquid-cooled V12 — 930 hp (697 kW) at take-off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupercharger:\u003c\/strong\u003e Mechanically driven, single-stage, single-speed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePropeller:\u003c\/strong\u003e Three-blade variable-pitch pneumatic Ratier or Chauvière\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoteur-canon configuration:\u003c\/strong\u003e Engine blocks cast with a central hollow axis between cylinder banks, allowing a 20 mm Hispano-Suiza HS-404 autocannon to fire through the propeller hub — a defining engineering characteristic of the type\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eHandling \u0026amp; Stability\u003c\/h3\u003e\n\u003cp\u003eOfficial CEMA (Centre d'Essais du Matériel Aérien) flight testing reported the D.520 as an exceptionally pleasant, stable, and highly manoeuvrable gun platform. Wide-track undercarriage retracted inward into the wing profile — unlike the narrow-track Bf 109 — giving excellent ground handling stability and minimising ground loop risk on unpaved airfields. Aerodynamic reports validated superb stall warning behaviour and predictable spin recovery, making the type significantly safer for low-hour pilots transitioning from biplanes.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFlight controls: High-aspect-ratio fabric-covered ailerons; pneumatically actuated split trailing-edge flaps\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003ePerformance Data — CEMA Trials\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMetric\u003c\/th\u003e\n\u003cth\u003e12Y-45 (Standard)\u003c\/th\u003e\n\u003cth\u003e12Y-49 (Experimental)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Speed\u003c\/td\u003e\n\u003ctd\u003e534 km\/h at 5,500 m\u003c\/td\u003e\n\u003ctd\u003e538 km\/h at 7,020 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSea Level Speed\u003c\/td\u003e\n\u003ctd\u003e425 km\/h\u003c\/td\u003e\n\u003ctd\u003e414 km\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime to 4,000 m\u003c\/td\u003e\n\u003ctd\u003e5 min 49 sec\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime to 8,000 m\u003c\/td\u003e\n\u003ctd\u003e14 min 30 sec\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombat Range\u003c\/td\u003e\n\u003ctd\u003e890 km\u003c\/td\u003e\n\u003ctd\u003e1,539 km (aux. tanks)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eService Ceiling\u003c\/td\u003e\n\u003ctd\u003e11,000 m\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eEngineering Bulletins \u0026amp; Variants\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulletin D.520-S \/ No. 465\u003c\/strong\u003e — Higher-pressure supercharger compressor wheel fitted to production lines to boost high-altitude performance under occupational restrictions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulletin D.524\u003c\/strong\u003e — Experimental installation of the 1,200 hp Hispano-Suiza 12Y-89; nose assembly lengthened to accommodate modified cooling plumbing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulletin SE.520Z\u003c\/strong\u003e — Post-war structural conversion framework for the 1,600 hp Hispano-Suiza 12Z engine; all secondary machine guns relocated entirely inside the wing profile for a pure wing-cannon layout\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cem\u003eThis is an archival, static-copy edition fixed at its original publication date. Intended for historical reference, flight simulation, museum restoration, and educational use only. Not approved for active airworthiness maintenance under FAA 14 CFR § 43.13, EASA Part-M, or equivalent international regulations. Operators of active aircraft must use current, revision-controlled publications from the Type Certificate holder or an authorised distributor.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eLiving Collections with Free Lifetime Updates — Please review our Disclaimer and Export Notice before purchasing.\u003c\/em\u003e\u003c\/p\u003e","brand":"Online Aviation Library","offers":[{"title":"Default Title","offer_id":53697511948635,"sku":null,"price":20.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4788\/3867\/files\/banner-1-d-520-wartime-flight-notice-descriptive.png?v=1785510372","url":"https:\/\/onlineaviationlibrary.com\/products\/dewoitine-d-520-notice-descriptive-et-dutilisation-armee-de-lair-fighter-documentation","provider":"Online Aviation Library","version":"1.0","type":"link"}