The Benz Aluminum Pistons*
A 230-hp. Benz engine, No. 31,560, taken from the Aviatik biplane, G. 130, captured on Feb. 12, 1918, was found to be fitted with aluminum pistons. As these are the first aluminum pistons to be found in a captured enemy aero engine in service, a detailed report of their design, together with a chemical analysis of the alloy, should be of interest.