Officially endorsed by the ACO, 24 Hour Race Technology provides an annual review of the engineering spectacle that is Le Mans, highlighting why certain technologies are to the fore. Both Prototype and GT cars are analysed in depth in this uniquely focused appraisal of the world's greatest twice-around-the-clock race, revealing many secrets of performance. Contents include: Intro: THE EDITOR Grid - The latest news from the world of endurance racing Dossier: SMP RACING BR 01 - New for 2015 LM P2 car, penned by Peugeot 908 designer Paolo Catone, is dissected Focus: TESTING AND SIMULATION - The complex world of off track testing and driver-in-the-loop simulation investigated Technical Review: LM P1 - 2015 was a year of impressive developments among the manufacturers in LM P1 Insight: PERFORMANCE ANALYSIS - Paolo Catone investigates where the leading teams gained and lost at the 2015 Le Mans 24 Hours Insight: AERODYNAMICS - In-depth analysis of the key aerodynamic developments in LM P1 Profile: XTRAC 1159 TRANSMISSION - What goes into building a modern endurance racing gearbox? Stewart Mitchell finds out Insight: PORSCHE SUSPENSION - Andrea Quintarelli simulates Porsche's innovative LM P suspension system Profile: SCG 003C - Stewart Mitchell looks at this one-off, road going GT racer PS : LAST TIME AROUND - Lawrence Butcher looks back on Nissan's previous Le Mans efforts.