Olm made a 9-cylinder radial engine that gave 250 hp at 1,800 rpm. It worked with the Diesel system.

-The preliminary studies and the development as well as the tests were carried out at the Moteurs Obram company in Antwerp.

-Particular attention was paid to the combustion process, reducing consumption to 190 gr/CV/Hr.

-It seems that it used a pre-combustion chamber. For the tests that were exhaustive, they made a bench for a single cylinder as we see in the photo below.

“OLM single-cylinder test bench at Obram”