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iceman2374
02-11-2005, 06:36 PM
I was just wondering exactly what is the use for adjusting the prop pitch? any help will be appriciated. Thank you

iceman2374
02-11-2005, 06:36 PM
I was just wondering exactly what is the use for adjusting the prop pitch? any help will be appriciated. Thank you

Bikewer
02-11-2005, 07:13 PM
No doubt you'll get more information than you possibly want...

Essentially, the blades of a prop are adjustable to take anywhere from a rather "thin" slice of air (at 100%) to progressively "thicker" slices. (lower settings)
At higher altitudes, where the air is thin, you lower the pitch to keep your engine in it's proper RPM range, kind of like a higher gear or even an overdrive on an automobile.
At low altitudes, or when taking off or landing, you want the "lower gears" to provide quick accelleration and power, so 100%.

When cruising at altitude, try dropping the pitch to 60-70% and watch the tachometer. You can also lower the fuel mixture, which provides a "leaner" mix for higher altitudes and less air. Experiment by lowering the fuel mixture while cruising. Eventually, the engine will start to cough and stall. Put it back up a notch or two and you have a maximum economy setting.
Of course, many of the more advanced aircraft are not adjustable, all these settings are automatic.

Slick750
02-11-2005, 09:54 PM
It's like a switch-pitch torque converter. http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif

Tully__
02-11-2005, 11:32 PM
Click here for real life prop pitch article (http://www.avweb.com/news/columns/182082-1.html)