Hispano-Suiza 18.Sb Aero Engine

The Hispano-Suiza 18.Sb is a rather quirky but powerful 18-cylinder aero-engine that kinda got lost in history! It was designed originally as the Hispano-Suiza 18R to compete in the 1929 Schneider Trophy for seaplanes. It was ordered by the French Air Ministry who needed a 1200 horsepower...