In 1911, the Rumpler “Aeolus”, a 50 hp, 8-cylinder, water-cooled engine was installed on the Taube aircraft.

-Finally, the photograph of Rumpler-Aeolus mentioned in the main text has been obtained.

-It was designed by Edmund Rumpler, and was built by Aeolus Flugmotor in 1910.

-Edmund (1872-1940) was a famous airplane and automobile engineer.

-He designed this engine after having seen the French Antoinette. Few units were made.

“Rumpler V-8 in Munich”

-The cylinders and crankshaft were made of chrome-nickel steel.

-There was only one rocker rod for controlling the valves, so that exhaust and intake were carried out with a special rocker arm that moved both valves.

-The power was 50 HP at 1,200 rpm. It had a total displacement of just over 6.5 liters.

-In the following sectional diagram we have:
-A, exhaust valves.
-E, intake valves.
-V, carburetor.
-O, oil pump.
-K, brazed copper jacket.
-C, cylinder.
-W1 is the cooling water inlet at the bottom of the cylinders and W2 is the outlet above the cylinder heads.

“Rumpler V-8 cross-section”

-This engine was installed on the Rumpler “Tauben”.

-Rumpler Werke GmBH, Berlin, Johanisthal.

-After WWI and despite the limitations of the treaties, it made a 1,000 HP 28-cylinder engine with four rows of seven cylinders.

-In 1923, Dr. Rumpler presented a four-row radial engine with 7 cylinders each joined together, totaling 28 cylinders. It was a water-cooled engine

“Two drawings of the 28-cylinder Rumpler engine”

-Note that the four rows are facing each other, using common blocks and a camshaft for each line of four cylinders.

From Appendix 9: We now have the V-8 engine in a good photograph and a diagram with two views, rear and side, to have an idea of this small and compact engine.

“Rumpler V8”

“Rear and side view of the Rumpler V8”

-Some tie rods from head to head of opposing cylinders are misleading the valve control system, which is classic, from a camshaft placed in the middle of the cylinder blocks on the bench.

-It gave 55 HP at 1,200 rpm with 115 Kg of weight.

From Appendix 10: From the MAE information center we obtained an image of the 1,000 HP, 28-cylinder engine, a monster for the time.

“Side view drawing of the Rumpler 28-cylinder engine”

From Appendix 12: Another view of the “Aeolus” 8-cylinder Vee with its characteristic valve control.

“Rumpler Aeolus”