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Guillows Series 200 - Rumpler C5 by edtherenderman. Viewed 439 times. Build Thread Next  Click image to return. Image Comments edtherenderman 04-Apr-21 18:13 Starting work on the Guillows 200 series Rumpler C.5. 3D modeling the Daimler-Mercedes DIVa engine. The plan is to 3D print at the correct scale for this model. jgood 05-Apr-21 13:43 What an interesting, and advanced, engine for the time. Overhead cam, 4 valves per cylinder! That intake is interesting too - with the carb at the back, how did they get equal fuel/air into each cylinder? edtherenderman 05-Apr-21 14:31 I agree that this was a pretty advanced engine. The overhead cam was shaft driven from the crank. The same shaft drove the magnetos. I think they managed the fuel/air mixture with the decreasing diameter intake. Some model references I looked at (www.wingnutwings.com) show the manifold wrapped in cloth strips. Not sure to keep it cold or hot. Remembering that optimizing internal combustion engine performance in 1917 was a pretty new art, it's amazing they got ~120hp out of this engine. jgood 05-Apr-21 15:24 Yeah, I'm sure that was a ton of power back then. Cars of the day had, what, 20HP?! bsadonkill 06-Apr-21 11:27 They were large displacement engines, around 900 cubic inch. They made around 200 HP at about 1600 RPM. That means they would have to produce more than 600 lb-ft of work! I think the DIVa was one of the first to use aluminum pistons in a Mercedes engine. This allowed them to up the compression ratio . Please sign in to comment on this image.