Eight-cylinder KHD Dz 700 two-stroke diesel

[nparmley]

Does anyone have, or know of information on the eight-cylinder KHD Dz 700 two-stroke diesel radial engine? This radial was designed just before WWII.

 

[WJPearce]

In 1937, the Dz 700 was built. It was an eight-cylinder, two-stroke, air-cooled, diesel engine. The engine had a 3.15 in (80 mm) bore and a 3.94 in (100 mm) stroke, giving a total displacement of 245 cu in (4.0 L). The Dz 700 produced 158 hp (118 kW) at 2,800 rpm. The Dz 700 had a diameter of around 38 in (1 m) and weighed only around 120 lb (55 kg). A blower (weak supercharger) forced air through manifolds in between and then into the cylinders. Utilizing Schnürle porting, the two intake ports were positioned slightly lower in the cylinder than the two exhaust ports, and all were covered and uncovered by the piston.

A merger occurred in 1939, and the company became Klöckner-Humboldt-Deutz (KHD). The diesel engine projects were relocated to Oberursel, Germany. Shortly after, development of the Dz 700, which was then under tests, was abandoned.

The Dz 700 was taken to the United States after World War II and ended up in a private collection in Florida. Around 1998, it was purchased by a private collector in Germany and returned to that country.

From:
Klöckner-Humboldt-Deutz (KHD) Dz 700, Dz 710, and Dz 720 | Old Machine Press

There are a few changes that need to be made in the article regarding the later engines.