Benz Bz III
The Benz Bz III is an aircraft engine, the Benz & Cie.. , Rheinische automotive and engine Fabrik AG. The liquid-cooled six-cylinder in-line engine with a displacement of 14.3 liters and a continuous output of 110 kW ( 150 hp) came in various machines of the Air Force of the German Army for installation. Until the end of 1915 about 3000 were manufactured before 1916 by the Benz Bz IV with 162 kW (220 hp) was replaced performance during the year. Also on the basis of Bz III came in August 1917, the Benz Bz IIIa with 15.2 liters displacement and 135 kW ( 185 hp ) for delivery. More V- engines with eight and twelve cylinders ( Benz Bz IIIb, Benz Bz VI) followed.
Construction
The Benz Bz III ( Manufacturer description: Type FF) emerged from the victorious at the first Emperor's Prize competition for aircraft engines in 1913 four-cylinder engine Benz FX. The basic design features of the FX Benz have also been adopted in the following models, the Benz Bz III originated only from the expansion of FX by two cylinders:
The bottom side camshaft actuated via pushrods and rocker arms hanging valves. The cylinders are arranged individually on the crankcase and have a separate water jacket. Each cylinder has two spark plugs ( dual ignition ). The intake air is through the crankcase to the two carburetors ( Benz FX: a carburetor ) supplied. The cooling water is circulated by a pump. The ignition system consists of two Bosch magnetos.
In parallel with the Benz Bz III and the two smaller six-cylinder aircraft engines Benz Bz were I with 75 kW ( 100 hp ) and Benz Bz II with 80 kW developed ( 110 hp ) to the same design principle.
Developments
In February 1916, the six-cylinder in-line engine Benz Bz IV came to the acceptance. The 30 percent more displacement and four-valve technology significantly stronger Bz IV was produced over 6000 times. Of the two V engines Benz IIIb ( 8 cylinder, as IIIc without propeller gearbox) and VI ( 12 cylinders ) were only small numbers built ( together 180 pieces of type IIIb / IIIc).