GT Gurney flap wicker clarification
#28909 from SCCA Staff · Rule change · TB 20-07 (2020-07 Fastrack)
In GT, GCR section 9.1.2.F.7.b.12., clarify Gurney flap as follows:
"D. The use of fences, end rails, Gurney flaps, wickerbills,or other forward facing lips or aerodynamic
devices is prohibited."
"E. A maximum 0.50 inch Gurney tab flap is allowed at the trailing edge of the wing element. The tab
must be mounted 90 degrees to the upper wing surface. No air may pass between the tab and the wing.
The endplates must be mounted parallel to the vehicle centerline, and must be perpendicular to the
ground. Endplates must be flat, with no curvature or Gurney tabs flaps."
"GT3: The maximum width of the entire wing assembly (wing element, endplates, Gurney tab flap and
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mounting hardware) is 64.00 inches, but no wider than the rear body width including fender flares."
In GT, GCR section 9.1.2.F.7.b.13., clarify Gurney flap as follows:
"A. Endplates must be flat, with no curvature or Gurney tabs flap. A maximum 0.5-inch wicker-bill Gurney flap may be employed."
In GT, GCR section 9.1.2.F.7.b.15.D., clarify Gurney flap as follows:
"2. Rear Wing: Wings shall be a single element with a maximum chord length of 12.00 inches, including
any wicker Gurney flap."
"4. The entire rear wing assembly, including the end plates and any wicker Gurney flap, shall be
mounted level with, or below, the peak of the roof."