|
曝光台 注意防骗 网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
POWER PLANT Description Vol. 2 19.10.14
Oct 05/06
Air Turbine Starter
The air turbine starter is mounted on the accessory gearbox. The air turbine starter converts pneumatic energy into mechanical motion. The starter mechanically engages the accessory gearbox through a clutch, and accelerates the N2 section of the power plant. The starter is
capable of dry-motoring the engine up to approximately 28% N2 rpm. During a normal start, the starter remains engaged until 55% N2, to assist the engine in accelerating to idle speed. At 55% N2 rpm, the starter control valve closes and the air turbine starter disengages.
For subsequent starts or relights, the starter clutch does not require that engine rotation be completely stopped before engaging the starter. The air turbine starter may be engaged at any rpm up to 55% N2 rpm (starter cutout speed).
Starter disengagement may be commanded at any time by pressing the engine STOP switch/light.
Engine Start/Ignition Panel Figure 19.10.9
Start Sequence
Each engine has a set of START and STOP switch/lights on the ENGINE START/IGNITION panel. When the engine START switch/light is pressed, the following occurs:
.
Left, right and isolation 10th-stage bleed air SOVs open;
.
Starter control valve on the associated engine opens to allow pressure from the 10th-stage manifold to engage the air turbine starter;
.
When the starter control valve opens, a white light illuminates in the associated START switch/light; and
.
At 55% N2 rpm, the start control valve is de-energized and the air turbine starter disengages.
The air turbine starter is subject to the following starter engagement limits:
STARTER ENGAGEMENT LIMITATIONS
POWER PLANT Description Vol. 2 19.10.15
Oct 05/06
Dry-Motoring
Dry-motoring is performed with ignition off and thrust levers at SHUT OFF.
Dry-motoring may be used for engine ground starts and engine airstarts.
IGNITION SYSTEM
Description
Two independent alternating current (AC) ignition systems are provided for each engine. Each ignition system consists of one ignition exciter and one igniter plug.
Ignition system A is powered by the AC essential bus. Ignition system B is powered by the battery bus through a static inverter.
Operation
There are three ignition system modes:
Normal – Prior to engine start, the ignition is armed by selecting either A or B ignition switch/light at the START/IGNITION panel. When an ignition system is armed, the corresponding white ARM light illuminates. Ignition is energized upon starter engagement, and is de-energized at starter cutout (55% N2). While an ignition system is energized, the corresponding green ON light
illuminates, and the IGNITION A (B) advisory EICAS message appears.
中国公务机网 www.gongwuji.com
公务机翻译 www.aviation.cn
本文链接地址：庞巴迪挑战者605公务机机组操作手册 CL605-动力装置 POWER_PLANT(7)
| 
