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Constant Speed Prop Basics

Gemini Sparkle

Key Takeaways:

  • Prioritize safety by delaying power adjustments until a safe altitude is reached after takeoff, and ensure the prop is full forward before landing to prepare for a go-around.
  • Follow specific power adjustment sequences: to reduce power, pull the throttle back first, then the prop; to increase power, push the prop forward first, then the throttle.
  • Always consult your aircraft's Pilot Operating Handbook (POH) for precise operating procedures, as many traditional rules (e.g., "over square," frequent prop cycling) are often outdated for modern engines.
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Chances are you’ve come across descriptions of how constant-speed propellers work, oh, about a thousand times since your piloting days began. Instead of rehashing how they operate, let’s talk about tips you can use to get the most out of your constant-speed prop.

The first tip is offered with safety in mind: After you push the throttle full forward, gather momentum on the runway and lift off, don’t touch the throttle (black knob), propeller (blue knob) or mixture (red knob) until you’ve reached a safe altitude. After all, if something is going to break, it might do so because you moved one of these levers. It’s best to gain altitude before adjusting power settings.

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