Piper Comanche (PA-24-250) Power On and Off Stalls

Every airplane is different. When transitioning to a new aircraft model, a typical checkout includes learning the relevant speeds, systems, checklists, normal procedures, and emergency procedures. This training should always be done with appropriately rated and proficient instructors.

Part of this training will include power on and power off stalls to learn how the aircraft feels when approaching a stall and how to recover if a stall is encountered. Power on stalls simulate a stall in climb configuration with gear and flaps up. Power off stalls are usually conducted in landing configuration with gear down and flaps down to simulate landing.

Book stall speeds are based on gross weight and will be lower at lower weights. In this flight, we checked the actual stall speeds against our known weight and found they closely matched predictions.

Another important parameter to understand is glide ratio in the case of an engine failure. We did a 1 minute, glide at stabilized best glide speed to determine an average sink rate which we could extrapolate to a glide ratio. Many apps and even panel GPS units can now calculate a glide footprint based on altitude so having a good number for glide ratio will make the footprint prediction more accurate.

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