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cowl flaps, please help!

Pro Member Chief Captain
Matthew Shope (mypilot) Chief Captain
Joined: Nov 26, 2004 Posts: 1716 Location: Long Beach, California KLGB/KTOA
Posted: Wed Dec 15, 2004 4:21 am

What in the world are cowl flaps?!

4 Responses

Pro Member Chief Captain
RadarMan Chief Captain
Joined: Aug 25, 2003 Posts: 18001 Location: U.S.A
Posted: Wed Dec 15, 2004 4:37 am

Best explanation I've ever seen. Bow Down
Everything should have a page like this, life would be so nice!

http://stoenworks.com/Tutorials/Cowl%20Flaps%20&%20Engine%20C.html

Radar

Pro Member Chief Captain
Matthew Shope (mypilot) Chief Captain
Joined: Nov 26, 2004 Posts: 1716 Location: Long Beach, California KLGB/KTOA
Posted: Wed Dec 15, 2004 11:53 pm

Thanks! I understand it now

Pro Member First Officer
leadfoot First Officer
Joined: Mar 13, 2004 Posts: 370
Posted: Thu Dec 16, 2004 12:01 am

Cowl flaps are basically control valves or doors that regulate how much air flows through the engine compartment for cooling purposes. Proper air flow around the engine is crucial to engine life. Too much air flow especially at altitude and cruise power can be damaging because there can be too much of a temperature gradient across the cylinders and heads, this is called shock cooling and can literally crack the engine block and cylinders not unlike pouring cold water on a hot glass. The cowl flaps are used to prevent that by limiting the flow of cold air over the engine.

Pro Member First Officer
PH First Officer
Joined: Dec 10, 2004 Posts: 376
Posted: Fri Dec 17, 2004 12:02 am

This is how me and cowl flaps work!
Take off - open
Cruise - 1/2
Descent - Closed
Final approach - open in preperation for Go Around.
This makes things simple!

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