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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 competitions, particularly the Gold class, necessitate heavily modified experimental aircraft due to continuous innovation in engines, aerodynamics, and other components, rendering stock planes uncompetitive.
  • Key modifications for winning include advanced engines (some adapted from other sports), smaller tires for enhanced braking, optimized fuel systems, and specialized aerodynamic devices like the "Henry Slip Flap."
  • Experimental aircraft facilitate rapid, modular modifications without extensive FAA paperwork, enabling quick evolution, but ultimate success in the rapidly progressing sport remains highly dependent on superior pilot skill and judgment.
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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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