STI master wing design is based on a modified Geottingen 387 airfoil that is inverted, and has various belly depth configurations, lengths, and widths to meet the individual racer (race car) needs within the perimeters of the governing racing body or sanction.

STI racing wings are precision designed and manufactured with a combination of cad/cam/aerodynamics analysis computer programs and cnc equipment. What does that really mean to you? It simply means that each wing concept is completely engineered*, modeled, and then tested through two special analysis programs for airflow co-efficiencies of drag, downforce, and "static" friction. These two systems also run virtual reality structural failure and stress fatigue tests as well.

From this point, after the "prototype" design has proven itself in all perimeters of it's design, it's "ribs" are then precision machined on STI's own AC-2V-3 Accu-II cnc vertical milling machine center using a Centroid M400-S cnc system. Each "rib" is "mirrored" (copied) within 0.0001" consistency, "rib" after "rib" until the amount required for that individual wing is complete.

STI machines each "rib" from 1.50" thick 6061-T6 alloy into a specially designed "6D" part that not only gives the wing as an assembly super strength, but makes the total mass weight equivalent to or less than that of a stamped sheet-metal "ribbed" wing!

STI uses 0.025" 3003-H14 alloy FAA certified aircraft "skin" on these wings, depending on size, this then is sent to our assembly area for hand fitting and weld-up. Here again, depending on the application, the two (2) "cross-spars" are usually 1.0" o.d.x 0.050" wall thickness 6061-T6 tubes that run from right to left, both in front and the rear of each "rib" to form the sub-structure. This sub-structure is held in place for hand mig-welding of the "spars" to the "ribs" by a specially designed "jig" that insures complete square and flatness of the total assembly. The next step is to install the "static-bulbs"** and the "skin" is then welded on. All end-plates and/or secondary trailing devices are installed by the customer at the time of mounting the assembly to the racer.

NOTES:

*any engineering problems are carefully handled by a hand chosen team of aerospace engineers that are outside consultants for STI.

** the "static-bulb" is an exclusive STI patented friction lowering device. Less friction means that the racer goes faster through the air!