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  • Chapter 7: Aircraft Systems › Turbine Engines › Thrust Variations

    damage, hot start, compressor stall, and flameout. Engine Temperature Limitations The highest temperature in any turbine engine occurs at the turbine inlet. TIT is therefore usually the limiting factor in turbine engine operation. Thrust Variations Turbine engine thrust varies directly ... 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…

  • Glossary › Domestic Reduced Vertical Separation Minimum

    left turns. Homing. Flying the aircraft on any heading required to keep the needle pointing to the 0° relative bearing position. Horizontal situation indicator (HSI). A flight navigation instrument that combines the heading indicator with a CDI, in order ... second, or 33,000 foot-pounds per minute. Hot start. In gas turbine engines, a start which occurs with normal engine rotation, but exhaust temperature exceeds prescribed limits. This is usually caused by an excessively rich mixture in the combustor…

  • Chapter 7: Aircraft Systems › Adjustable-Pitch Propeller

    power produced is directly related to the fuel-air mixture being delivered to the combustion chamber. As the throttle setting is increased, more fuel and air flows to the engine and MAP increases. When the engine is not running ... pressure (i.e., 29.92 inches mercury (29.92 "Hg)). When the engine is started, the manifold pressure indication decreases to a value less than ambient pressure (i.e., idle at 12 "Hg). Engine failure or power loss is indicated on the manifold gauge…

  • Chapter 14: Transition to Tailwheel Airplanes › Taxiing

    second strong contrast to nose-wheel airplanes, tailwheel aircraft make lift while on the ground anytime there is a relative headwind. The amount of lift obviously depends on the wind speed, but even at slow taxi speeds, the wings ... done by first applying power to start the airplane moving slowly forward, then retarding the throttle and simultaneously applying pressure smoothly to both brakes. If braking action is unsatisfactory, the engine should be shut down immediately…

  • Chapter 5: Engine Starting Systems › Direct Cranking Electric Starter › Direct Cranking Electric Starting System for Large Reciprocating Engines

    moves out until it is stopped either by engagement with the engine or by the jaw stop retaining nut. The travel nut continues to move slightly beyond the limit of jaw travel, just enough to relieve some of the spring ... provide torque on the spiral splines that balance most of the pressure of the jaw spring. If the engine fails to start, the starter jaw does not retract since the starter mechanism provides no retracting force. However, when the engine…

  • Chapter 14: Human Factors › Glossary

    Fretting corrosion. Occurs when two mating surfaces, normally at rest with respect to one another, are subject to slight relative motion. Friction. The opposition to movement between objects. Fuel grade. The rating system used for aviation gasoline. It rates fuel ... second or 33,000 foot-pounds per minute and 746 Watts. Hot start. Occurs when the engine starts, but the exhaust gas temperature exceeds specified limits. This is usually caused by an excessively rich air-fuel mixture entering the combustion…