Mods for STOL Drag

As the sport gains traction, airplane modifications, such as tiny tires and the 'Henry Slip Flap,' give winners an edge—especially in the gold class.

Josh Richling

Thursday, April 28, 2022 at 12:37 PM ET

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[Photo: Leonardo Correa Luna]

Key Takeaways:

STOL Drag airplanes, particularly in the highly competitive Gold Class, require extensive and rapidly evolving modifications, with experimental aircraft dominating due to greater flexibility for alterations without FAA hassle.
Engine modifications are critical, ranging from highly tuned traditional aircraft engines with modern enhancements (like nitrous oxide) to powerplants borrowed from other sports (e.g., jet ski or snowmobile engines with turbos or superchargers).
Other significant modifications include the use of "tiny tires" for weight reduction and improved braking, specialized fuel systems for rapid adjustments, and aerodynamic devices like the "Henry Slip Flap" to enhance drag during landing.
Despite the continuous technological evolution and ingenuity in aircraft modifications, the article underscores that superior pilot skill remains the single most important factor for success in STOL Drag.

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Like a car tuned for a particular kind of race, the airplanes that compete in STOL Drag events need an extra touch—whether their pilots take the starting line at Reno, High Sierra, or any of the local meets in between.

At the top of the competition, in the gold class, a stock aircraft is officially a thing of the past. While a stock—albeit stripped—aircraft could potentially capture a podium position in the bronze class, the gold class requires much more modification to be competitive.