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Chris Palmer

Chief Flight Instructor and President of Angle of Attack. Founded in 2006.

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Convective SIGMET: The One Weather Advisory You Never Ignore

Convective SIGMET: The One Weather Advisory You Never Ignore 14 min read Last updated June 2026 · Chris Palmer A convective SIGMET is an urgent in-flight weather advisory the National Weather Service issues for thunderstorm hazards dangerous to every aircraft — embedded or severe thunderstorms, lines of thunderstorms, and large areas of heavy storms. Defined […]

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What Is a Constant-Speed Propeller? The Blade That Shifts Gears for You

What Is a Constant-Speed Propeller? The Blade That Shifts Gears for You 17 min read Last updated June 2026 · Chris Palmer A constant-speed propeller is a variable-pitch propeller that automatically changes its blade angle to hold the RPM you select, no matter how throttle, airspeed, or attitude change. A cockpit propeller control sets the […]

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What Is a Cold Front? Weather Hazards for Cross-Country Pilots

What Is a Cold Front? Weather Hazards for Cross-Country Pilots 18 min read Last updated June 2026 · Chris Palmer A cold front is the leading edge of a colder, denser air mass that advances and wedges underneath warmer air, forcing it to rise steeply. That rapid lifting builds towering cumulus and cumulonimbus clouds, and […]

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What Is a Checklist in Aviation? Why Pilots Read Every Item Out Loud

What Is a Checklist in Aviation? Why Pilots Read Every Item Out Loud 16 min read Last updated June 2026 · Chris Palmer A checklist in aviation is a written, step-by-step list of actions a pilot performs to set up, operate, or troubleshoot an aircraft safely. Pilots read each item aloud and verify it physically, […]

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