ASSIGNMENT SHEET
BLEED/START AIR
Assignment Sheet Number 64B7-205
INTRODUCTION
This topic discusses the purpose and operation of the Bleed/Start Air system. As an OOD or Combat Systems watchstander, you must have a working knowledge of the Prairie and Masker air systems for conducting Anti-submarine Warfare (ASW) operations. In addition, the EOOW and the OOD must understand the capabilities and limitations of the various types of start air available for the gas turbine engines.
LESSON TOPIC LEARNING OBJECTIVES
Terminal Objective:
7.0 DESCRIBE the principles, function, construction, components, control and monitoring systems, and operation of a gas turbine propulsion plant and associated auxiliary support systems. (JTI:A)
Enabling Objectives:
7.16 DESCRIBE the purpose and operation of all major components in the Bleed Air System and systems supplied by the Bleed Air System to include:
a. Heat Exchangers
b. Pressure Regulators
c. Temperature Regulators
d. Isolation valves
7.17 DESCRIBE the location as well as the operation of the Bleed Air System and systems supported by the Bleed Air System including:
a. Masker Air System
b. Prairie Air System/Fin Air
c. Anti-icing System
d. Cross Bleed Starting System
7.18 LIST and DESCRIBE the location as well as the operation of all major components of the Start Air System.
a. Heat Exchangers
b. Pressure Regulators
c. Temperature Regulators
STUDY ASSIGNMENT
1. Read Information Sheet 64B7-205
2. Outline information sheet 64B7-205 using the enabling objectives for lesson 64B7-205 as a guide.
3. Complete study scenarios.
STUDY SCENARIOS
1. While conducting a walk-through of the MER, you stop to talk with the watch. Discuss the uses of customer bleed air.
2. As OOD, you give the EOOW permission to conduct a cross bleed start on 1B GTE. What is the minimum Gas Generator (Ngg) speed required for cross bleed starting?
3. During an intake inspection you notice the anti-icing piping in front of the combustion and cooling intakes. What is the purpose of Anti-icing air?
INFORMATION SHEET
BLEED/START AIR
Information Sheet Number 64B7-205
INTRODUCTION
This topic discusses the purpose and operation of all major components in the bleed air system. This lesson also covers the systems supplied by the bleed air system. These systems include prairie, masker, and GTE cross-bleed start air. We will discuss the various types of start air available for the gas turbine engines including the SSDG start air compressor (SAC), High Pressure (HP) air, and GTE cross-bleed air.
REFERENCES
(a) SIB Vol. 2, Part 2, NAVSEA S9FFG-AM-SIB-022/(U) FFG-21
(b) PPM Vol. 1, S9234-BL-GTP-010/FFG-7, Propulsion Plant Manual
(c) Applicable FFG7 Class Advisories
INFORMATION
Figure 1 Gas Turbine Bleed Air System
Figure 2 Masker Air System
Figure 3
Figure 4
Figure 5 GTE Bleed/Start Air System
Figure 6 HP Starting Air System
Figure 7