Propeller or jet? - Saab 900 Bulletin Board - Saabnet.com
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Propeller or jet?
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Posted by S Carlson [Email] (more from S Carlson) on Fri, 15 Feb 2019 22:04:04 Share Post by Email
In Reply to: Airplane sound, Fogline [Profile/Gallery] , Fri, 15 Feb 2019 13:45:45
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Does it sound like a prop or a jet? Change in pitch dependent on speed? Prop that changes in pitch dependent on speed is likely wheel bearing.

I think you might have misspoken - you say it doesn't make it when you turn left, but it does when you turn left. If you meant it does it when you turn one direction and not when you turn the other, it's likely the wheel bearing.

Bad wheel bearings make more noise when they have more load. Thus a bad left wheel bearing will make more noise when you turn right. When you turn left it will quiet down. Conversely, a bad right wheel bearing will make more noise when you turn left and quiet down when you turn right. There are exceptions when only one race of the bearing is bad, making it susceptible to side loads, but most of the time this above rule of thumb holds true. Listening for which side it's coming from will help also.

posted by 75.69.61...

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