 | This article needs additional citations for verification .(August 2008) |
| Bz.IV | |
|---|---|
 | |
| A Benz Bz.IV at the National Air and Space Museum's Udvar-Hazy Center (2017) | |
| Type | Inline piston engine |
| National origin | Germany |
| Manufacturer | Benz |
| First run | c. 1916 |
| Number built | 6,400 |
| Developed from | Benz Bz.III |
| Developed into | Benz Bz.IVa |
The Benz Bz.IV was a German six-cylinder, water-cooled, inline engine developed for aircraft use. Deliveries began in 1916, and some 6,400 were produced.
The Bz.IV was a dual-camshaft design, with two intake and two exhaust valves per cylinder. The cylinders were cast iron surrounded by a sheet metal cooling jacket. The crankcase was aluminium and pistons were initially steel but later versions had aluminium pistons. A high compression version of the engine (Bz IVü) was produced from 1917 onwards and can be recognised by the red bands painted on each cylinder. In February 1918, pistons from a Bz.IV were the first captured aluminium pistons to be examined by the British Ministry of Munitions. [1]
Data from [2]
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