Type 44 Hispano-Suiza Type 40 (8E ?) Hispano-Suiza Type 41 (8A ?) 8F (HS-42) at 2,100 rpm (eq. 750 lb·ft torque). The direct drive 8F was basically a bored out version of the 8B, intended for use in bombers, with a displacement of . Despite the increased weight of , the 8F was also installed in fighters such as the Nieuport-Delage NiD 29 and Martinsyde Buzzard, and would have powered the never-produced Mk.II version of the Sopwith Dolphin. Engine speed being lower than that of the HS-8B, the reduction gear was deleted, thereby increasing engine reliability. 8Fa generally similar to the 8F. 8Fb , aka HS Type 42, compression ratio of 5.3:1, direct drive. 8Fd Special For the CAMS 38 Schneider Trophy racer developing 8Fe (HS-42VS) (1926) bore x stroke, for take-off. Wolseley W.4A Python I , compression ratio of 4.7:1. License production of the 8Aa at Wolseley Motors Ltd. Wolseley W.4A Python II , compression ratio of 5.3 :1. Wolseley W.4A Viper , compression ratio of 5.3 :1. Wolseley's engineers removed problems with the crankshaft and increased the compression ratio to give more power, with some early engines having a compression ratio of 5.6:1. Wolseley W.4A Viper II at 2,000 rpm. Wolseley W.4B Adder I , compression ratio of 4.7 :1, reduction spur gear to 0.593:1. Wolseley W.4B Adder II , compression ratio of 4.7 :1, reduction spur gear to 0.593:1. With stronger crankshaft webs. Wolseley W.4B Adder III , compression ratio of 4.7 :1, reduction spur gear to 0.593:1. With balanced crankshafts. Wright-Hisso AWright-Martin built Type 34/HS8Aa at 1,400 rpm and 4.72:1 compression. Wright-Hisso B 4-cyl in-line water-cooled Wright-Hisso C geared A Wright-Hisso D geared A with cannon Wright-Hisso E at 1,700 rpm and 5.33:1 compression(HC 'I') Wright-Hisso E-2 (HC 'E') Wright-Hisso F ('D' without cannon) Wright-Hisso H , based on the Type 42/HS8F Wright-Hisso H-2 improved 'H' Wright-Hisso I Wright-Hisso K H with 37mm Baldwin cannon Wright-Hisso K-2 Wright-Hisso M experimental 300 hp Wright-Hisso T Wright-Hisso 180 hp V-8 direct drive Wright-Hisso 220 hp V-8 geared drive Wright-Hisso 300 hp V-8 geared drive M-6 A Soviet Union produced copy of the 8Fb Wright-Hisso V-720 Applications Austin-Ball A.F.B.1 (single prototype) Avia BH-21 (from 1925) Avia BH-22 Bartel BM-5 Bernard SIMB AB 10 Blanchard Brd.1 Caudron R.11 (8Bba) Caudron C.59 Caudron C.61 (8Ac) Curtiss JN-4H Jenny (rare subvariant) De Bruyère C 1 Descamps 27 (8Fb) Dewoitine D.1 (8Fb) Farman