@fly.goldseal: Engine thrust varies directly with air density. As air density decreases, so does thrust. Additionally, because air density decreases with an increase in temperature, increased temperatures also results in decreased thrust. While both turbine and reciprocating powered engines are affected to some degree by high relative humidity, turbine engines will experience a negligible loss of thrust, while reciprocating engines a significant loss of brake horsepower. When altitude increases, the tachometer may not represent correct power output of the engine. For example, 2,300 rpm at 5,000 feet produces less horsepower than 2,300 rpm at sea level because power output depends on air density. Air density decreases as altitude increases and a decrease in air density (higher density altitude) decreases the power output of the engine. Leaning the mixture decreases fuel flow, which also compensates for the decreased air density at high altitude. Turbochargers, superchargers, and turbines combat this by compressing the intake air to increase its density. 🌡️✈️ - - - - - - - - - - - - - - - #studentpilot #flighttraining #privatepilot #learntofly #pilottraining

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Friday 23 January 2026 16:41:49 GMT