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  #1  
Old 12-30-2018, 07:11 AM
beneditoangelo beneditoangelo is offline
 
Join Date: Nov 2011
Location: Fortaleza - Ceara - Brazil
Posts: 14
Default Strong whistle

My RV 12 flew for the first time at the end of November. Everything worked fine so far I flew six hours. Last weekend I started to hear a loud whistle similar to the stall alarm. I have reviewed all the stall alarms plus the problem continues.
The whistle is so strong I can not fly the plane.
Can anybody help me?

Benedito Angelo
S/N 120547
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  #2  
Old 12-30-2018, 07:36 AM
Bob Y Bob Y is offline
 
Join Date: Jul 2017
Location: Piedmont, SC
Posts: 31
Default

I donít have a flying 12 yet, so canít help diagnose the problem, but if I did, Iíd need more information to help. Does it occur when the plane isnít moving? Is there a specific air speed at which it starts to occur? Does it change with angle of attack? Iíd think those types of answers might help.
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  #3  
Old 12-30-2018, 07:54 AM
bobg56 bobg56 is offline
 
Join Date: Nov 2018
Location: Peachtree City, GA
Posts: 37
Default

Check the alarms, I have a D180 and it was the AOA warning even though I don't have the AOA installed, the previous owner was trying to reset some custom settings and I guess defaulted some others. A friend who was familiar with the D180 noticed this and put the alarm to off, its was a constant tone in the headset.
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  #4  
Old 12-31-2018, 07:42 AM
Mike Buettgenbach Mike Buettgenbach is offline
 
Join Date: Jan 2005
Posts: 41
Default When does it whistle?

Had a similar prob. Loud buzz/whistle in flight. Turned out to be leading edge of the canopy. Somebody on this forum (sry, donít remember who) helped me out.
Good Luck
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Mike B
RV-7 for sale
RV-12 Flying!
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  #5  
Old 12-31-2018, 09:59 AM
DaveWelch DaveWelch is offline
 
Join Date: Mar 2005
Location: Huntsville, AL
Posts: 329
Default Whistle

Benedito,
It is unclear from your post, did you try removing your headset while in flight? If the whistle disappears then review the settings as mentioned earlier. If the whistle remains, then turn your head in various positions to get a general idea where the source is.

We have a mild whistle that appears to come from the right edge of our canopy. A small rag laid along the forward edge stops the noise.

If your noise persists you could also try using tape over any exterior holes or gaps until the source is found.

Good Luck and Happy New Year!

Dave
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Dave
RV12 N951DZ
First Flight 9/23/16!
No paint yet. Working on a scheme with John Deere colors or accents.
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  #6  
Old 12-31-2018, 10:13 AM
Ron B. Ron B. is offline
 
Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
Posts: 2,248
Default

I inherited a whistle when I installed my gear fairings and wheel pants. Notice it more on descent at low power settings.
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Thanks Ron
RV-10 SOLD
RV-14 Flying
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  #7  
Old 01-03-2019, 04:38 PM
DaveWelch DaveWelch is offline
 
Join Date: Mar 2005
Location: Huntsville, AL
Posts: 329
Default

Did you resolve the whistle? How?
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Dave
RV12 N951DZ
First Flight 9/23/16!
No paint yet. Working on a scheme with John Deere colors or accents.
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