OSI Silver Fox, a radical racing prototype designed by Sergio Sartorelli in 1967, powered by a 1000cc Renault Alpine engine in the left hull of its twin-hull layout. Three prominent wings, including an adjustable front wing, connected the hulls and enhanced its aerodynamics. Despite the small engine, it could reach 155 mph. However, as Officine Stampaggi Industriali went out of business in 1968, it never raced and remained a one-off.










