Configuration: Radial, Water cooled
Aircraft Example: Salmson 2A.2
The Salmson Z-9 engine, rated at 280
hp., was quite unique--although it was a radial engine--it was cooled by
water. The Z-9 was installed in the Salmson 2A.2 airplane which arrived on
the Front early in 1918. The U.S. Air Service purchased 705 Salmson 2A.2s
from France and used them to equip many of its observation squadrons.