The Walter Sagitta was a Czechoslovakian, air-cooled, inverted V-12 engine that first ran in 1937.
This was one of several smaller, low-mass medium power pre-war V-12 engines produced.
With a displacement of 18.4 liters (1,123 cu in), it produced up to 373 kW (550 hp) at 2,500 rpm.
[1] Data from Jane's.
[2] Comparable engines Related lists