MAN (Machinenfabrik-Augsburg-Nürnberg), the well-known industrial and automotive engine factory, mainly for trucks, also made aviation engines. This was during WWI and WWII.

“Mana III”

-The Mana III 6-cylinder in-line displaced 21.6 liters and delivered 130 kW at 1,400 rpm. It was made between 1917 and 1918.

“Mana V”

-In 1918, the Mana V appeared, delivering 270 kW at 1,420 rpm. It had a displacement of 45.6 liters and 10 cylinders in V at 72°. It was considered as a "high altitude" engine because it maintained power between 0 and 4,000 meters.

“Inverted 12-cylinder V-engine”

-Already in 1940, in WWII, when Germany demonstrated a high technical level and being in full development, MAN presented a 12-cylinder inverted-V Diesel engine that delivered 1,100 kW at 2,500 rpm.

-An interesting and atypical 10-cylinder V-engine is the Man that is being restored by the "Friends of the Safran Museum" in Villaroche.

“Atypical 10-V MAN”

-Precisely for having only 10 cylinders, the V formed by the cylinders is not 60° or 90° but 72°.

-Therefore the crankshaft bearings have unusual placement angles. For all this it is a very interesting study.

From Appendix 6: By 1970, when it was not yet MTU, Man Technologies introduced a rocket engine combustion chamber consisting of multiple tubes forming the wall.

-Logically the combustible liquid would circulate to cool it. The system is known as regenerative.

“MAN combustion chamber from 1970”