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  • Chapter 7: Aircraft Systems › Starting System

    starter engages the aircraft flywheel, rotating the engine at a speed that allows the engine to start and maintain operation. Electrical power for starting is usually supplied by an onboard battery, but can also be supplied by external power through ... starter switch draw current from the main bus bar, but the starter will not operate until the starting solenoid is energized by the starter switch being turned to the “start” position. When the starter switch is released from the “start…

  • Chapter 4: Helicopter Components, Sections, and Systems › Dual Tachometers › Clutch

    rotor must be disconnected from the engine when the starter is engaged. A clutch allows the engine to be started and then gradually pick up the load of the rotor. Figure 4-20. The main rotor transmission reduces engine output ... coupling between the gas producer turbine and the power (takeoff) turbine functions as an air clutch for starting purposes. When the engine is started, there is little resistance from the power turbine. This enables the gasproducer turbine to accelerate…

  • Chapter 2: Personal Minimums › Personal Minimums › Step 5—Adjust for Specific Conditions

    table as shown in Figure 2-8. Figure 2-8. Sample baseline personal minimums. Step 5—Adjust for Specific Conditions Any flight a pilot makes involves an infinite combination of pilot skill, experience, conditions, and proficiency. Aircraft equipment and performance ... environmental conditions, and external influences vary considerably. Both individually and in combination, these factors can compress or expand the safety buffer provided by baseline personal minimums. Consequently, a pilot should develop a practical way to adjust baseline personal minimums…

  • Chapter 2: Personal Minimums › Personal Minimums › Step 2—Assess Experience and Comfort Level

    ceiling as 7,000 feet, and the lowest visibility as 15 miles. A pilot may never experience MVFR conditions and would leave the dash in place. However, in this example and as shown in Figure 2-3, the pilot regularly ... flies in an area where normal summer flying involves hazy conditions over relatively flat terrain and is more experienced and comfortable in MVFR. The pilot used the MVFR column to record personal minimums of a 2,500-foot ceiling…

  • Chapter 8: Ground Procedures and Flight Preparations › Engine Start and Rotor Engagement

    Engine Start and Rotor Engagement During the engine start, rotor engagement, and systems ground check, use the manufacturer’s checklists. If a problem arises, have it checked before continuing. Prior to performing these tasks, however, make sure the area around ... rotor blades so that they are not aligned with the fuselage. This may prevent the engine from being started with the blades still fastened. For a two-bladed rotor system, position the blades so that they are perpendicular…

  • Chapter 2: Personal Minimums › Personal Minimums › Step 3—Consider Other Conditions

    this example, the pilot did not fill in the LIFR boxes for known “comfort level” in instrument meteorological conditions (IMC) after deciding to avoid flight in those conditions. 12402 Experience and “Comfort Level” Assessment Figure 2-4. A sample pilot ... single table, the summary of a pilot’s known “comfort level” for VFR, MVFR, IFR, and LIFR weather conditions might appear as shown in Figure 2-5. Figure 2-5. Experience and comfort level assessment for combined…