A 7-cyl. air-cooled radial engine introduced in 1928. With a bore and stroke of 4.25 inches and a compression ratio of 5.2:1, the Scarab developed 125 hp (93 kW) at 2,050 rpm from 422 cu in (7 L) with a dry weight of 285 lb (129 kg).
Scarab Junior
A 5-cyl. version introduced in 1930 developing 90 hp (67 kW) at 2,125 rpm from 301 cu in (5 L) with a dry weight of 230 lb (104 kg).
The R-500-7 Super Scarab model 165 displayed at Museo dell'Aria e dello Spazio in San Pelagio, Due Carrare, Province of Padua.
Super Scarab SS-50/50A
Increased cylinder bore to 4.625 inches to develop 145 hp (108 kW) at 2,050 rpm from 499 cu in (8 L) with a dry weight of 303 lb (137 kg).
Super Scarab SS-165
Increased compression ratio from 5.2:1 to 6.4:1 to develop 165 hp (123 kW) at 2,100 rpm with a dry weight of 341 lb (155 kg).
Super Scarab SS-185
Increased cylinder bore to 4.875 inches, developing 185 hp (138 kW) at 2175 rpm from 555 cu in (9 L), with a dry weight of 344 lb (156 kg).
R-420
Military designation of the Scarab.
R-500
Military designation of the Super Scarab 165.
R-550
Military designation of the Super Scarab 185.
145
Alternative designation for the Warner Super Scarab SS-50/50A .
165
Alternative designation for the Warner Super Scarab 165 .
185
Alternative designation for the Warner Super Scarab 185 (Primarily a helicopter application).
Applications
Among the many uses for the Scarab, the engine was fitted to the Cessna Airmaster and the Fairchild 24 (UC-61 or Argus). Notably, in 1942, it was put into use powering the Sikorsky R-4, the first helicopter to be put into production.
Many of these reliable engines soldier on today, still powering the aircraft to which they were originally mounted. The Warner 145 and 165 hp engines are the most commonly seen of the small radials for US-built pre-World War II sad - aircraft, in large part because of good parts availability due to the engines having been used on World War II Fairchild UC-61s and Meyers OTWs.
Warner engines are also in demand as realistically sized, though far more powerful, replacement powerplants for many replica or restored World War I era airplanes which were originally fitted with rotary engines.
^TYPE CERTIFICATE DATA SHEET NO. E-2(PDF). DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION.
^Grey, C.G.; Bridgman, Leonard, eds. (1938). Jane's all the World's Aircraft 1938. London: Sampson Low, Marston & company, ltd. p. 103d.
External links
Wikimedia Commons has media related to Warner Scarab.
Oldengine.org - US Aero Engine data page 2016-03-03 at the Wayback Machine
Transcribed manual
January 07, 2023
warner, scarab, american, seven, cylinder, radial, aircraft, engine, that, manufactured, warner, aircraft, corporation, detroit, michigan, 1928, through, early, 1940s, military, service, engine, designated, scarabpreserved, type, radial, enginemanufacturer, wa. The Warner Scarab is an American seven cylinder radial aircraft engine that was manufactured by the Warner Aircraft Corporation of Detroit Michigan in 1928 through to the early 1940s In military service the engine was designated R 420 ScarabPreserved Warner ScarabType Radial engineManufacturer Warner Aircraft CorporationFirst run November 1927 Contents 1 Variants 2 Applications 2 1 Application list 3 Specifications Scarab 50 3 1 General characteristics 3 2 Components 3 3 Performance 4 See also 5 References 6 External linksVariants EditScarab S 50 A 7 cyl air cooled radial engine introduced in 1928 With a bore and stroke of 4 25 inches and a compression ratio of 5 2 1 the Scarab developed 125 hp 93 kW at 2 050 rpm from 422 cu in 7 L with a dry weight of 285 lb 129 kg Scarab Junior A 5 cyl version introduced in 1930 developing 90 hp 67 kW at 2 125 rpm from 301 cu in 5 L with a dry weight of 230 lb 104 kg The R 500 7 Super Scarab model 165 displayed at Museo dell Aria e dello Spazio in San Pelagio Due Carrare Province of Padua Super Scarab SS 50 50A Increased cylinder bore to 4 625 inches to develop 145 hp 108 kW at 2 050 rpm from 499 cu in 8 L with a dry weight of 303 lb 137 kg Super Scarab SS 165 Increased compression ratio from 5 2 1 to 6 4 1 to develop 165 hp 123 kW at 2 100 rpm with a dry weight of 341 lb 155 kg Super Scarab SS 185 Increased cylinder bore to 4 875 inches developing 185 hp 138 kW at 2175 rpm from 555 cu in 9 L with a dry weight of 344 lb 156 kg R 420 Military designation of the Scarab R 500 Military designation of the Super Scarab 165 R 550 Military designation of the Super Scarab 185 145 Alternative designation for the Warner Super Scarab SS 50 50A 165 Alternative designation for the Warner Super Scarab 165 185 Alternative designation for the Warner Super Scarab 185 Primarily a helicopter application Applications EditAmong the many uses for the Scarab the engine was fitted to the Cessna Airmaster and the Fairchild 24 UC 61 or Argus Notably in 1942 it was put into use powering the Sikorsky R 4 the first helicopter to be put into production Many of these reliable engines soldier on today still powering the aircraft to which they were originally mounted The Warner 145 and 165 hp engines are the most commonly seen of the small radials for US built pre World War II sad aircraft in large part because of good parts availability due to the engines having been used on World War II Fairchild UC 61s and Meyers OTWs Warner engines are also in demand as realistically sized though far more powerful replacement powerplants for many replica or restored World War I era airplanes which were originally fitted with rotary engines Application list Edit CAC Wackett Cessna Airmaster Cessna Model AW Curtiss XC 10 Davis D 1 Fairchild 22 C7E C7F Fairchild 24 C8B Fleet Model 1 General Aristocrat Gee Bee Sportster Model E Harlow PJC 2 L class blimp Meyers OTW Monocoupe 110 Pasped Skylark Redfern Nieuport 17 24 Ryan S C Ryan ST W Sands Fokker Dr 1 Triplane Sikorsky R 4 Stinson SM 2 Waco RSO Waco RBA Waco BNF and RNFSpecifications Scarab 50 Edit Warner Scarab engine advertisement for 1928 in Aero Digest Data from FAA Type Certificate Data Sheet TCDS 1 Jane s all the World s Aircraft 1938 2 General characteristics Type Seven cylinder air cooled radial piston engine Bore 4 25 in 108 mm Stroke 4 25 in 108 mm Displacement 422 cu in 6 92 L Length 29 in 740 mm Diameter 36 5625 in 928 69 mm Height 36 5 in 930 mm Dry weight 292 lb 132 kg Components Valvetrain 1 inlet and 1 exhaust valve per cylinder Fuel system Stromberg NA 5SA carburetor or Holley equivalent Fuel type 67 octane Avgas Oil system Dry sump Cooling system Air cooledPerformance Power output 125 hp 93 kW at 2 050 rpm Compression ratio 5 15 1 Specific fuel consumption 0 55 lb hp hr 0 334 kg kW hr Oil consumption 0 025 lb hp hr 0 015 kg kW hr Power to weight ratio 0 43 hp lbSee also Edit Logo of Scarab engines Related development Warner Scarab JuniorComparable engines Armstrong Siddeley Genet Major Kinner B 5 Pobjoy NiagaraRelated lists List of aircraft enginesReferences Edit TYPE CERTIFICATE DATA SHEET NO E 2 PDF DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION Grey C G Bridgman Leonard eds 1938 Jane s all the World s Aircraft 1938 London Sampson Low Marston amp company ltd p 103d External links Edit Wikimedia Commons has media related to Warner Scarab Oldengine org US Aero Engine data page Archived 2016 03 03 at the Wayback Machine Transcribed manual Retrieved from https en wikipedia org w index php title Warner Scarab amp oldid 1126754277, wikipedia, wiki, book, books, library,
