Franklin Q Hershey designed the 1948 Cadillac, taking inspiration from seeing a secret new fighter plane, the Lockheed P38 Lightning in the late 1930s. It is said that the raised rear lamps were modelled on the P38 tailfins, and the waistline also took cues from the P38. 1948 cars were available as Series 61 and 62, as well as the longer Fleetwood model. The 1948 cars had two-piece windshields, but these were curved. A 5,678cc L-head V8 powered the Cadillacs, but a new 5,425cc ohv V8 was introduced in 1949 with modest restyling and revised grille. For 1950 Hershey under direction from Harley J Earl gave the Cadillacs a one-piece windshield, new bonnet and grille and some more chrome. The fastback bodies were deleted in 1950, and the Series 61 was now built on the shorter Series 62 wheelbase. For 1951 more 'egg crate' grilles were incorporated into the front, and the 'bullet' bumpers grew larger. The 1952 Cadillacs celebrated 50 years of Cadillac with new badging, grille and more chrome, and this trend continued for 1953 when the cars got one-piece rear windows.