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The Power of Modifying Your Prop and Wings

One of the quickest and easiest ways to increase the thrust of a modestly-powered engine is via the propeller.

When a more powerful engine upgrade is out of the budget, the wing and propeller are the next best places to find untapped takeoff performance. [Courtesy: Chris Litzkow]
Gemini Sparkle

Key Takeaways:

  • The author, dissatisfied with his Cessna 170's weak takeoff performance and the high cost of engine upgrades, decided to pursue more accessible modifications.
  • He ordered an 80/42 seaplane propeller to significantly improve takeoff performance, accepting a trade-off in cruise speed, but plans to swap it with his existing prop for longer trips.
  • Additionally, he purchased a Sportsman STOL kit, which is expected to drastically improve takeoff and landing distances, slow flight characteristics, and glide ratio.
  • These combined modifications are intended to substantially enhance the aircraft's short-field capabilities and safety, particularly for obstacle clearance.
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The windsock at my home airfield is a liar, and I no longer trust it. Last week, it convinced me to take off with a light tailwind on a warm day with a passenger aboard. Disaster was never imminent, but the takeoff was quite uncomfortable. 

The prevailing winds, the winds at surrounding airports, and the weather briefing I received prior to the flight all indicated that Runway 13 was the one to use. During the 15 to 20 minutes leading up to my departure, however, the windsock lazily swung around and slightly rose to show a light wind from the opposite direction. It stayed there, and so, I chose Runway 31 for the takeoff.

Jason McDowell

Jason McDowell is a private pilot and Cessna 170 owner based in Madison, Wisconsin. He enjoys researching obscure aviation history and serves as a judge for the National Intercollegiate Flying Association. He can be found on Instagram as @cessnateur.

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