{"product_id":"curtiss-hs-1l-flying-boat","title":"Curtiss HS-1L Flying Boat — U.S. Navy Coastal Patrol Flying Boat | Original 1918 Handbook \u0026 Liberty Engine Documentation","description":"\u003ch2\u003eCurtiss HS-1L Flying Boat\u003c\/h2\u003e\u003cp\u003eThe Curtiss HS-1L was the standard single-engine coastal patrol flying boat of the U.S. Navy during World War I — the foundational mass-produced model of the Curtiss \"H-Small\" series. Governed by the U.S. Navy Department Bureau of Construction and Repair 1918 Handbook, this collection preserves the primary-source engineering and operational documentation that defined the type.\u003c\/p\u003e\u003cp\u003eThis archival collection brings together the original technical handbooks, engine manuals, and engineering bulletins that supported the HS-1L in service — including the Liberty L-12 powerplant documentation issued by both U.S. and Allied authorities, and a comparative Rolls-Royce Eagle\/Falcon engine reference from the same operational period.\u003c\/p\u003e\u003chr\u003e\u003ch3\u003eDocument Manifest\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e#\u003c\/th\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003cth\u003eIssuing Authority\u003c\/th\u003e\n\u003cth\u003eDate \/ Edition\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eHandbook of the Curtiss HS-1L Flying Boat\u003c\/td\u003e\n\u003ctd\u003eU.S. Navy Department, Bureau of Construction and Repair\u003c\/td\u003e\n\u003ctd\u003e1918\u003c\/td\u003e\n\u003ctd\u003eAir Board Technical Dept. reference; primary operational handbook\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eInstructions for Installation, Inspection and Maintenance — Liberty 12 Engine\u003c\/td\u003e\n\u003ctd\u003eSignal Corps, U.S.A.\u003c\/td\u003e\n\u003ctd\u003ec. 1918\u003c\/td\u003e\n\u003ctd\u003eU.S. Army Signal Corps edition of the Liberty L-12 manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eComplete Drawings of the Liberty 12 Engine\u003c\/td\u003e\n\u003ctd\u003eOcean Publishing Company\u003c\/td\u003e\n\u003ctd\u003ec. 1918–1919\u003c\/td\u003e\n\u003ctd\u003eU.S.A. Standardized Aircraft Engine — full engineering drawing set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eThe 12 Cylinder Liberty Aero Engine\u003c\/td\u003e\n\u003ctd\u003eMinistry of Munitions \/ Royal Air Force\u003c\/td\u003e\n\u003ctd\u003eSeptember 1918\u003c\/td\u003e\n\u003ctd\u003eConfidential — British RAF edition of the Liberty L-12 manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eRolls-Royce Aero Engine Instruction Book — Eagle Series I–VIII \u0026amp; Falcon Series I, II \u0026amp; III\u003c\/td\u003e\n\u003ctd\u003eRolls-Royce \/ Air Board Technical Dept.\u003c\/td\u003e\n\u003ctd\u003ec. 1917–1918\u003c\/td\u003e\n\u003ctd\u003eAir Board Technical Dept. Book No. 244 — comparative Allied engine reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch3\u003e1. Aerodynamic Reports\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWing Configuration:\u003c\/strong\u003e Unequal-span biplane wing arrangement engineered with an RAF 6 airfoil profile.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll Control Enhancement:\u003c\/strong\u003e First Curtiss production horn-balanced ailerons on both upper and lower wings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLateral Geometry:\u003c\/strong\u003e 2° dihedral on outer wing panels for inherent lateral stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAero-Structure Sub-panels:\u003c\/strong\u003e Standard three-bay biplane wing bracing layout.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e2. Engine Technical Notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowerplant:\u003c\/strong\u003e Single Liberty L-12 V-12 water-cooled piston engine, 330–360 hp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePropulsion Layout:\u003c\/strong\u003e Single-engine pusher configuration on elevated nacelle assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePropeller Specification:\u003c\/strong\u003e Fixed-pitch heavy wooden assembly — 2-blade and 4-blade configurations depending on sub-contractor production run.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel System Architecture:\u003c\/strong\u003e Gravity-fed overhead fuel tank isolating structural vulnerabilities within the main hull.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e3. Handling \u0026amp; Stability Studies\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrodynamics:\u003c\/strong\u003e Single-step hull with wide planing bottom profile.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Stability:\u003c\/strong\u003e Built-in side sponsons for balance during water taxiing and takeoff.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAerodynamic Stability:\u003c\/strong\u003e Flat-bottomed tail booms anchoring the tail unit against engine prop-wash.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Deflection:\u003c\/strong\u003e Conventional cable-driven system operating balanced elevators and enlarged rudder surface.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e4. Performance Data Sheets\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eOperational Metric\u003c\/th\u003e\n\u003cth\u003eSpecification Data\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Airspeed\u003c\/td\u003e\n\u003ctd\u003e87–91 mph (140 km\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e6,432 lbs (2,918 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmpty Weight\u003c\/td\u003e\n\u003ctd\u003e4,300 lbs (1,950 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWingspan\u003c\/td\u003e\n\u003ctd\u003e62 ft 1 in (18.9 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClimb Performance\u003c\/td\u003e\n\u003ctd\u003e1,800 ft (550 m) in 10 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Ceiling\u003c\/td\u003e\n\u003ctd\u003e~1,725 ft under full payload\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlight Endurance\u003c\/td\u003e\n\u003ctd\u003e4 hours 30 minutes nominal patrol endurance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003e5. Engineering Bulletins\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe \"L\" Variant Shift:\u003c\/strong\u003e Conversion blueprint from the 200 hp Curtiss V-X-3 to the standardized Liberty V-12 engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArmament Upgrades:\u003c\/strong\u003e Underwing bomb rack installation for up to 360 lbs of ordnance (typically two 180-lb depth charges).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDefensive Stations:\u003c\/strong\u003e Nose-mounted Scarff ring mounting twin .303 Lewis machine guns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvolution to HS-2L:\u003c\/strong\u003e Engineering changes for heavier 230-lb depth charges — four six-foot wing panels added, creating a four-bay wing configuration with 74 ft span.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003cp\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 authorized distributor.\u003c\/p\u003e\u003cp\u003eLiving Collections with Free Lifetime Updates – Please review our Legal Notice and Export Notice before purchasing.\u003c\/p\u003e","brand":"Online Aviation Library","offers":[{"title":"Default Title","offer_id":53751248716123,"sku":null,"price":45.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4788\/3867\/files\/banner-1-hs-1l-hero.png?v=1786378203","url":"https:\/\/onlineaviationlibrary.com\/products\/curtiss-hs-1l-flying-boat","provider":"Online Aviation Library","version":"1.0","type":"link"}