1991-1993 Toyota Eagle MkIII

Images copyright Martin Spetz and Michael J. Fuller
Text copyright Michael J. Fuller

The MkIII’s twin-tier rear wing was first raced in mid-1992.  Compared to the standard rear wing MkIII, the twin-tier wing increased downforce by 18% for the same level of drag.  It also had the added benefit of substantially increasing overall downforce at higher levels of drag over the single-tier variant.  The twin-tier rear wing was never used at Daytona out of driver preference and drag concerns.
The leading edge alignment between the upper and lower tiers on the MkIII’s rear wing was driven by the initial aerodynamic conflict that occurred when the two were aligned along their trailing edges when viewed from above.

ęCopyright 2008, Michael J. Fuller