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The Luftstreitkräfte planes had much smaller increases in engine power than the Allied though both sides were getting their increases from higher compression and higher octane fuel formulations.
Also of note is the Oberursel Ur.II which is a licensed copy of the Le Rhône 9J used in many Allied planes, including the Sopwith Camel. Some German pilots obtained improved engines from downed allied planes and mounted them in their Fokker tri-planes even!
It astonishes me over and over how gigantic these engines are given their output, and how low the rpm is for peak-output. Never mind that most engines started the war with around 4:1 compression and the "overpressure" engines were barely approaching 7:1 by the end. This is all natural aspiration too!
Below the fold for the bandwidth disabled.
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| Albatros D.III with 160 hp Mercedes d.III inline-6 engine. |
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| Albatros D.III with 170 hp Mercedes d.IIIa inline-6 engine. |
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| Albatros D.III made by Ostdeutsche Albatros Werke (OAW) with 170 hp Mercedes d.IIIa inline-6 engine, note the D.V style tail! |
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| Albatros D.V with 160 hp Mercedes d.III inline-6 engine. |
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| Albatros D.V with 170 hp Mercedes d.IIIa inline-6 engine. |
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| Albatros D.V with 180 hp Mercedes d.IIIaü inline-6 engine. |
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| Albatros D.Va with 170 hp Mercedes d.IIIa inline-6 engine. |
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| Albatros D.Va with 180 hp Mercedes d.IIIaü inline-6 engine. |
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| Fokker Dr.1 with 110 hp Oberursel Ur.II 9-cylinder rotary engine. |
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| Fokker D.VII with 170 hp Mercedes d.IIIa inline-6 engine. |
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| Fokker D.VII(F) with 180 hp Mercedes d.IIIaü inline-6 engine. |
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| Royal Aircraft Factory S.E.5a with 200 hp Hispano-Suiza 8Ba V-8 engine. |
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| Sopwith Camel F.1 with 110 hp Le Rhône 9J 9-cylinder rotary engine. |
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| Sopwith Camel F.1 with 130 hp Clerget 9B 9-cylinder rotary engine. |
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| Sopwith Camel F.1 with 150 hp Gnome Monosoupape 9N 9-cylinder rotary engine. |
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| SPAD S.XIII with 200hp Hispano-Suiza 8Ba V-8 engine. |
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| SPAD S.XIII with 220 hp Hispano-Suiza 8Be V-8 engine. |
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| SPAD S.XIII with 235 hp Hispano-Suiza 8Bb V-8 engine. |
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