Each half had its own crankpin, 180° apart,[5] with the connecting rods, of chrome nickel steel, broad and flat to bring the two halves close together.

The automatic inlet valves of earlier Anzani engines, opened by atmospheric pressure and closed by valve springs[4] were retained, but fuel was fed from a mixing chamber in the crankcase via inlet tubes placed at the rear of the engine to avoid cooling of the mixture by the oncoming airflow.

[2] This arrangement placed the exhaust valves at the front of the engine, where they were operated from a cam in the rear of the crankcase via push rods and rockers.

for the British variant[3]) were mounted in the sides of the cylinder heads, sloping upwards to avoid plug fouling by lubricating oil.

Because they powered the 66 Caudron G.4s purchased by the American Expeditionary Force after September 1917,[8] used largely as trainers, many Anzani 10s went to the USA.