Wankel Rotary Piston Engine: Memory or Reality?

Abstract

Abstract. The article examines the evolution of the Wankel rotary engine from the first patents of the 1920s–1950s to modern niche applications. The advantages and disadvantages of the design are presented, including high power density, low vibration, and smooth operation, along with poor fuel efficiency and increased exhaust toxicity. Key milestones in the technology’s adoption by the automotive industry (NSU, Mazda) and its role in motorsports (Mazda 787B victory at Le Mans in 1991) are described. New applications for rotary engines in 2026-2030 are highlighted: hybrid powertrains (range extenders), hydrogen engines, marine propulsion, and unmanned aerial vehicles. Based on market data analysis, the author concludes that interest in the technology is reviving in specialized segments, with a projected compound annual growth rate of 6.5% until 2032.