Noticed some whistling while flying today...

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Hey all! So i went flying today and noticed some whistling that i hadnt heard before. I have a P4. Not so much upon take-off but as i gained distance and raised my altitude. It wasnt anything loud or worrisome really. Just slightly enough to where i thought to myself "gee, i dont remember hearing that before"...It flew like normal and again wasnt there while hovering in front of me. I could just hear it in the distance while in the air. I brought it back down and rechecked the props just in case but everything was ok. Has anyone else experienced this?

Thanks!
 

ianzone

**P4**
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It's called tetnis,,a ringing of our ears lol,,serious I have p4s and it does have a slight whistle to it,its possible it's always been there and your ears just picked it up,(your body more observant to its workings) check it all anyway but sure it's ok UNLESS it's a berring noise,,,is motor nice and secure and no shaft play,,,motor probably wont spin normal if this occured
 

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