🔍 Key Concepts

• Location and function of the starter or accessory drive in View A of illustration GT-0006 • Characteristics of a gas turbine start cycle (very high starting torque at low speed, then rapidly increasing speed) • Basic properties of AC vs DC motors and hydraulic motors used as starters

💭 Think About

• From View A, identify which component is labeled as the starter and consider what kind of drive it must provide to bring the compressor/turbine up to self-sustaining speed • Think about which of the listed motor types is best known for providing very high starting torque and good speed control for short-duration starting duty on marine machinery • Consider the shipboard power system available during start: which motor type fits typical low-voltage DC or hydraulic power normally supplied to critical starting systems?

✅ Before You Answer

• Verify in View A which label (30 or 31) corresponds to the starter motor on the accessory gearbox • Check which motor type is commonly described in marine engineering texts as providing maximum starting torque for short periods • Confirm that your choice matches both the power source normally available and the torque/speed requirements of a gas turbine starter system