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delynch1(at)juno.com
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 Posted: Wed Aug 26, 2009 5:37 am Post subject: Whistling Noise |
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I have a KitFox Model IV, with a Rotax 582 and have noticed a high-pitched whistling type noise emanating from under the hood. It's not terribly loud and has a bell's tonal quality. The frequency does not change at different rpm settings, it only get somewhat louder. In other words, the cycle, or pitch of the noise doesn't change with different power settings.
I have listened to it also with the upper cowling removed and both doors off tryng to determine if it is caused by prop blast blowing through an opening or hole. It's hard to pinpoint where it's coming from, but it seems to be strongest on the right side (while seated on the left).
If anyone else has experienced this type of thing before, or has any ideas, I would like to hear from them. I won't be flying it until I can figure this out!
David Lynch
N97C
Timberlake, NC
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n85ae
Joined: 14 Mar 2007
Posts: 403
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| Posted: Wed Aug 26, 2009 6:35 am Post subject: Re: Whistling Noise |
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I had a similar sound that was barely audible for a flight or two
before my vac pump failed on my IO-240
Jeff
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