1. Nissan DeltaWing

One of the latest and bravest attempts to introduce new construction concepts in the world of race cars is the Nissan DeltaWing. Nissan has been experimenting with triangular-shaped race cars for some time, entering the Le Mans in 2012. The DeltaWing has some advantages over conventional cars in terms of handling and aerodynamics, but the project was plagued with numerous mishaps and problems. So, after several years of trying, Nissan decided to retire the DeltaWing.