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Assignment 2-Cont. - 14001_279
Assignment 3-Cont. - 14001_281

Aviation Boatswains Mate E 3 & 2 - Aviation theories and other practices
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ASSIGNMENT 3 Textbook Assignment: “Steam Catapults”; chapter 4, pages 4-1 through 4-76. 3-1. What are the most significant differences among the various types of 1. 2. 3. 4. steam catapults? Power strokes and lengths Endspeeds and power strokes Endspeeds and launching capacities Lengths and launching 3-7. capacities 3-8. IN ANSWERING QUESTIONS 3-2 THROUGH 3-4, SELECT FROM COLUMN B THE SYSTEM THAT CONTAINS THE COMPONENTS LISTED IN COLUMN A. A. COMPONENTS B. SYSTEMS 3-2. Launching valve 1. assemblies 3-3. Injector nozzles 2. 3-4. Digital endspeed indicator magnetic 3. sensors 4. Steam system Launching system Drive system Lubrication system 3-5. What determines the number of launching cylinders that are mounted in the catapult trough? 1. Type and overall length of the catapult 2. Required amount of elongation for the type of catapult 3. Number of base pads in the trough 4. Number of lubricator nozzles required for the type of catapult 3-6. What function is provided by the cylinder covers of the launching engine? 1. Eliminates the need for external bracing of the trough covers and track assembly 2. Prevents steam from escaping through the cylinder slots during the power stroke 3. Prevents steam pressure from spreading the cylinder in the area of the cylinder slot 4. provides a means of connecting the shuttle to the piston assemblies 3-9. 3-10. 3-11. 3-12. 3-13. What prevents the loss of steam from behind the steam piston assemblies during the catapult’s power stroke? 1. Sealing strips 2. Piston rings 3. The piston barrel 4. Bushings What force maintains the tension on the catapult launching engine cylinder sealing strip? 1. Hydraulic pressure 2. Spring tension 3. Steam pressure 4. Air pressure What component serves as the chassis for the other components of the steam piston assembly? 1. The spear 2. The barrel 3. The connector 4. The support guide What component serves as a bearing surface for the piston assembly? 1. The rubbing strip 2. The barrel 3. The piston guide 4. The strip guide A total of how many rollers are mounted on the shuttle frame? 1. Six 2. Two 3. Eight 4. Four What component of the water brake cylinder installation forms the vortex at the open end of the water brake cylinder? 1. The jet ring 2. The striker ring 3. The annulus ring 4. The choke ring The term “elbow pressure” refers to what specific pressure? 1. The basket strainer inlet pressure 2. The basket strainer outlet pressure 3. The water pressure entering the water brake cylinder 4. The pump discharge pressure 12







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