UC知道波音747的引擎可以在空中无引气的情况下启动吗?
来源：百度知道 编辑：UC知道 时间：2024/07/02 23:00:44
我记得曾经有一个747飞到火山灰里面的例子,说那个747到了火山灰以后4个引擎全都熄火了~然后重新启动了几个引擎,但是我查了下手册,我这没有检查单,手册上说"来自引气管的空气向连接到 N2 转子上的起动马达提供动力。一般说来APU 是起动气源，但也可使用来自地面气源车或另一台工作的发动机的空气。 "
可是4个引擎熄火,apu无法在空中启动,怎么那架飞机能在滑行了一段时间以后启动几个引擎呢?引气是从哪来的?
摘自wikipedia:
"At approximately 13:42 UTC (20:42 Jakarta time), engine number four began surging and soon flamed out. The flight crew immediately performed the engine shutdown drill, quickly cutting off fuel supply and arming the fire extinguishers. Less than a minute later, at 13:43 UTC (20:43 Jakarta time), engine two surged and flamed out. Within seconds, and almost simultaneously, engines one and three flamed out prompting the flight engineer to exclaim, "I don't believe it – all four engines have failed!"[3]"
"The crew began the engine restart drills, despite being well above the recommended maximum engine in-flight start envelope altitude of 8,500 m (28,000 ft) and all attempted were futile."
可是4个引擎熄火,apu无法在空中启动,怎么那架飞机能在滑行了一段时间以后启动几个引擎呢?引气是从哪来的?
摘自wikipedia:
"At approximately 13:42 UTC (20:42 Jakarta time), engine number four began surging and soon flamed out. The flight crew immediately performed the engine shutdown drill, quickly cutting off fuel supply and arming the fire extinguishers. Less than a minute later, at 13:43 UTC (20:43 Jakarta time), engine two surged and flamed out. Within seconds, and almost simultaneously, engines one and three flamed out prompting the flight engineer to exclaim, "I don't believe it – all four engines have failed!"[3]"
"The crew began the engine restart drills, despite being well above the recommended maximum engine in-flight start envelope altitude of 8,500 m (28,000 ft) and all attempted were futile."
可以空中启动！参照多发熄火或失速检查单
飞机在机场停着后引擎点火时没看到有什么东西连接啊，不明白什么是引气
发动机点火开关不是有地面点火和空中点火嘛...........
可以启动吗？
当然，飞机不可能只有一个APU，应该吧~