Here are three examples of USAC “Indy” cars from the years 1977, 1984, and 1985. They were constructed by three different British racecar constructors, but all were powered by the same engine: the turbocharged Cosworth DFX V8.
The first is a rather basic cutaway of the McLaren M24
. The illustrator and, indeed, the source of this drawing are unknown to me. The drawing is annotated to point out the differences between a USAC car and the M23 Formula One car from which it was derived. The partial text, which had accompanied my copy of this drawing, leads me to believe that its source was also a British publication. Although a simple cutaway, this drawing well illustrates the engine installation. This car competed in the 1977 USAC racing series and Tom Sneva went on to win the ‘77 National Championship with this car/engine combination. While the Vel’s Parnelli Jones Team had pioneered the use of the DFX engine the previous year, this McLaren/Cosworth proved its worth. Although the drawing says the DFX was a 2.8 litre engine, and one can find Internet claims of 2.4 litres, the engine was a destroked DFV of 2.65 litres. The Ford/Cosworth DFX (notice the “Ford” branding on the cam cover) went on to win 153 races from 1976 through 1987.
Beautiful artistry! - I know my brother has been searching in vain for, what I believe, is one of your pieces. That being the 84C March IndyCar that was based upon the black, silver, red trim Galles/Coors Light/ Al Unser Jr. chassis from the 1984 season. His first IndyCar victory at Portland was that year in like colors. Please continue with the show.
The next cutaway, the March 84C
of David Kimble could hardly be more different in technique. At last “B Squared”s request has been answered. This image comes from the June 1984 issue of Hot Rod Magazine
. Notice that the branding on the DFX cam cover now reads “Cosworth”.
In 1985 Tony Matthews illustrated another DFX-powered Indy car, the Lola T900
. This image comes from a May 23, 1985 story in Machine Design
, discussing safety at the Indianapolis race. It also featured his illustration of the March 85C, from a similar perspective as Kimble’s , but my extraction of the pages from the magazine destroyed too much of the image to reconstruct.