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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.

[Photo: Leonardo Correa Luna]
Gemini Sparkle

Key Takeaways:

  • STOL Drag competition, particularly the top Gold class, necessitates extensive and rapidly evolving aircraft modifications, moving far beyond stock configurations.
  • Key modifications include highly customized engines (some borrowed from other sports), "tiny tires" for weight reduction and improved braking, and specialized drag devices like the "Henry Slip Flap."
  • Most modifications are modular and easier to implement on experimental aircraft, which dominate the Gold class, but ultimately, superior pilot skill and judgment remain crucial for success.
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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.

Josh Richling

Josh Richling is a crew chief in the National STOL Series. He covers STOL competitions for FLYING.

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