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USMCmech · February 17th, 2005, 21:57

[ QUOTE ]
Shutting down an engine in flight (single engine), regardless of HOW its done is just one more step through the "Swiss Cheese." ... you're really asking for an incident folks.

[/ QUOTE ]

I think many people belive that a engine might not start after the mixture is pulled in flight. This is not true.

Flying along at normal cruise speed and power settings, you can pull the mixture to "idle cuttoff". In about 2 seconds the engine will stop producing power, but it will continue turning. Imeaditly after you return the mixture controll to "rich" the engine will start making power again.

As I said before, don't try this at low altitude. My rule with a student is, "the engine must be making power by 3K AGL"

The engine in a SE airplane is no different from the one in a light twin. If you don't belive me, go up and try it in a twin.

I have had several people say to me "everybody knows how hard airplane engines are to get started, I would be worried that it wouldn't start back up"

There is a huge difference between starting a cold engine from a dead stop with a puny starter and a wimpy battery, and reintroducing fuel to a warm engine already turning.

This is the exact same way turbines are started. The air is compressed, and the igniters are sparking, once fuel is introduced combustion starts.

February 17th, 2005, 21:57	#14
USMCmech Old Skool Join Date: May 2004 Location: Dallas TX Posts: 1,729	Re: Teaching emergencies [ QUOTE ] Shutting down an engine in flight (single engine), regardless of HOW its done is just one more step through the "Swiss Cheese." ... you're really asking for an incident folks. [/ QUOTE ] I think many people belive that a engine might not start after the mixture is pulled in flight. This is not true. Flying along at normal cruise speed and power settings, you can pull the mixture to "idle cuttoff". In about 2 seconds the engine will stop producing power, but it will continue turning. Imeaditly after you return the mixture controll to "rich" the engine will start making power again. As I said before, don't try this at low altitude. My rule with a student is, "the engine must be making power by 3K AGL" The engine in a SE airplane is no different from the one in a light twin. If you don't belive me, go up and try it in a twin. I have had several people say to me "everybody knows how hard airplane engines are to get started, I would be worried that it wouldn't start back up" There is a huge difference between starting a cold engine from a dead stop with a puny starter and a wimpy battery, and reintroducing fuel to a warm engine already turning. This is the exact same way turbines are started. The air is compressed, and the igniters are sparking, once fuel is introduced combustion starts.