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Looking at the Physics of STOL Drag

Racing circuit's airplanes requires starting and stopping twice while flying less than a mile.

High wings and a tailwheel are taken for granted on STOL airplanes for a lot of practical reasons. [Leonardo Correa Luna]
Gemini Sparkle

Key Takeaways:

  • STOL Drag racing is a unique aviation competition where pilots must rapidly accelerate, fly 2,000 feet, land, come to a full stop, turn around, and repeat the process, emphasizing both speed and precise deceleration.
  • Successful competitors utilize highly modified aircraft, often with 400 hp engines and stripped-down weights under 1,000 pounds, to achieve extreme acceleration and ultra-short takeoffs.
  • Pilot skill is paramount, particularly in mastering complex deceleration techniques like aerodynamic slipping and precise wheel braking to stop quickly at the finish line without compromising stability, all within races lasting just over 50 seconds.
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At a point in my meandering journalistic career, I found myself behind the wheel of a Porsche 911 Turbo on a Southern California racetrack. One of the turns was a 90-degree elbow of essentially zero radius that came at the end of a long straightaway on which the sports car would reach 120 mph or so. The problem—which resembled the game of chicken in the 1955 film Rebel Without a Cause and which I was shamefully slow to master—was to use maximum braking just in time to arrive at nearly zero speed right at the corner, but not a moment sooner.

Slowing down matters as much as accelerating in most auto racing, and the same is true of STOL Drag racing. Unlike traditional Reno-style pylon racing, which involves no slowing down whatsoever, STOL Drag requires starting and stopping twice while flying less than a mile.

Peter Garrison

Peter Garrison taught himself to use a slide rule and tin snips, built an airplane in his backyard, and flew it to Japan. He began contributing to FLYING in 1968, and he continues to share his columns, ""Technicalities"" and ""Aftermath,"" with FLYING readers.

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