The Jacobs R-915 or Jacobs L-6 is a seven-cylinder, air-cooled, radial engine for aircraft manufactured in the United States, production started in 1936.[1]
The R-915 was effectively an enlargement of the R-755 with strengthened stressed parts.[2] With a bore and stroke of 5.5 in × 5.5 in (140 mm × 140 mm), for a displacement of 915 cu in (15 L). Take-off power was around 330 hp (250 kW). The engine features steel cylinders with aluminum-alloy cylinder heads.
Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN1-85260-163-9
Jane's Fighting Aircraft of World War II. London. Studio Editions Ltd, 1989. ISBN0-517-67964-7
External linksedit
Wikimedia Commons has media related to Jacobs L-6.
Jacobs L-6 MB, Bomber Command Museum of Canada - Nanton Lancaster Society
FAA Type Data Certificate Sheet - R-915
December 12, 2023
jacobs, jacobs, seven, cylinder, cooled, radial, engine, aircraft, manufactured, united, states, production, started, 1936, 915type, radial, enginemanufacturer, jacobs, aircraft, engine, companydeveloped, from, jacobs, contents, design, development, variants, . The Jacobs R 915 or Jacobs L 6 is a seven cylinder air cooled radial engine for aircraft manufactured in the United States production started in 1936 1 R 915Type Radial engineManufacturer Jacobs Aircraft Engine CompanyDeveloped from Jacobs R 755 Contents 1 Design and development 2 Variants 3 Applications 4 Engines on display 5 Specifications R 915A1 5 1 General characteristics 5 2 Components 5 3 Performance 6 See also 7 References 7 1 Notes 7 2 Bibliography 8 External linksDesign and development editThe R 915 was effectively an enlargement of the R 755 with strengthened stressed parts 2 With a bore and stroke of 5 5 in 5 5 in 140 mm 140 mm for a displacement of 915 cu in 15 L Take off power was around 330 hp 250 kW The engine features steel cylinders with aluminum alloy cylinder heads Variants editR 915A1 Baseline variant an enlarged R 755 R 915A3 Similar to the A1 but with Scintilla magnetoes R 915A4 With a power take off for autogyrosApplications editAvro Anson Mk II and Mk III Beechcraft Model 18D Beechcraft F 17D Staggerwing Fleet 50 Howard DGA 15J Kellett KD 1 Waco AQC AGC ARE AVNEngines on display editA preserved Jacobs R 915 is on display at the Nanton Lancaster Society 3 A Jacobs L 6 is on display at the Canadian Museum of Flight 4 Specifications R 915A1 editData from Jane s 5 General characteristics Type 7 cylinder air cooled radial piston engine Bore 5 5 in 140 mm Stroke 5 5 in 140 mm Displacement 915 cu in 15 L Length 40 in 1 030 mm Diameter 45 5 in 1 160 mm Dry weight 555 lb 252 kg Components Valvetrain 2 valves per cylinder pushrod actuated sodium cooled exhaust valves Fuel system Single Stromberg NA R7A carburetor Fuel type 80 octane Oil system One pressure pump two scavenge pumps Cooling system Air cooled Reduction gear Direct drive right hand tractorPerformance Power output 330 hp 246 kW at 2 200 RPM at sea level Specific power 0 36 hp cu in 16 4 kW L Compression ratio 6 1 Power to weight ratio 0 6 hp lb 1 kW kg See also editRelated development Jacobs R 755Comparable engines Armstrong Siddeley Cheetah Avia Rk 17 Bristol Neptune Piaggio Stella P VII Wright R 760Related lists List of aircraft enginesReferences editNotes edit Gunston 1989 p 85 Wilkinson Paul H 1950 Aircraft engines of the World 1950 8th ed London Sir Isaac Pitman amp Sons Ltd p 161 Nanton Lancaster Society Jacobs L 6 MB Retrieved 23 July 2015 The Canadian Museum of Flight L 6 Retrieved 31 January 2009 Janes 1989 p 305 Bibliography edit Gunston Bill World Encyclopedia of Aero Engines Cambridge England Patrick Stephens Limited 1989 ISBN 1 85260 163 9 Jane s Fighting Aircraft of World War II London Studio Editions Ltd 1989 ISBN 0 517 67964 7External links edit nbsp Wikimedia Commons has media related to Jacobs L 6 Jacobs L 6 MB Bomber Command Museum of Canada Nanton Lancaster Society FAA Type Data Certificate Sheet R 915 Retrieved from https en wikipedia org w index php title Jacobs R 915 amp oldid 1134726080, wikipedia, wiki, book, books, library,
