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Building Tips and technical articles. => 1/2 A building. => Topic started by: John Crocker on June 26, 2007, 06:01:57 PM
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Should I take the screen off the venturi? I know why its there, but it would seem that it could impede airflow. Anybody cooked an engine in a crash because something flew into the venturi?
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I have one that simply lost its screen a couple of years ago, I didn't take it out...can't tell any difference in how it runs. I doubt it impedes the air flow to any significance. I consider it sorta neutral--doesn't hurt anything; doesn't really help anything either. Most engines don't have a venturi screen, and I haven't heard that it's a problem with them. But I guess I'd just leave it alone.
--Ray
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If you are flying on grass etc, screen is a help to keep "stuff"out of the engine.
Note: Over time, the engine side of the venturi screen will tend to clog (looks like a light Castor film), not easily visible from the outside. I store mine nose down so any residual fuel or after run oil will collect on the screen. I periodically pull mine and clean it.
Roger
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John, i fly daily on grass and dirt and the cox engines i have without screens need to be taken apart regularly and dirt cleaned out of the reed and tank. I wouldn't think of taking the screens out of my norvels. If you fly in any dirt i would highly recommend keeping the screens in, as far as casto clogs go, i feel sure over time one small blast of engine cleaner would clear the screen and evaporate .