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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]
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Key Takeaways:

  • STOL Drag aircraft, particularly in the top-tier gold class, require extensive modifications, favoring experimental planes due to easier integration of high-performance engines and aerodynamic innovations.
  • Key modifications include powerful engines (some adapted from snowmobiles or jet skis), "tiny tires" for improved braking and weight reduction, and drag-inducing devices like the "Henry Slip Flap."
  • Despite the continuous evolution of aircraft technology and modifications, superior pilot skill and judgment remain the single most critical factor for success in competitive 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.

Josh Richling

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

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