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Home✈️Aircraft🚁Helicoptere-SABGoblin 380 › weird low frequency thudding sound
08-06-2019 02:02 AM  7 months ago
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thorhubbell

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Ithaca, NY -USA

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weird low frequency thudding sound
Hi there-
My 380 was making bad sounds and not flying right- I noticed the front tail pulley was worn out and pivoting on the bolt. I replaced the pulley and threw in a new tail belt and it flew really nice for like a day. Now I'm having a thudding sound and I can't figure out what it is (though it is flying fine). Can anyone help?
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08-06-2019 07:41 AM  7 months ago
dgoss999

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UK - Lancashire

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Has it lost a tooth from the new belt or got a tear or something stuck on the belt?"Believe none of what you hear, and only half of what you see." • Benjamin Franklin
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08-06-2019 11:31 PM  7 months ago
thorhubbell

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Ithaca, NY -USA

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nope
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08-12-2019 10:01 PM  7 months ago
ticedoff8

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Morgan Hill, CA. USA

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There is nothing on a 380 that is "low frequency"
Everything is turning pretty fast.

Most likely it is the belt slapping inside the tailboom
But, if you have any other details - like when it sounds louder than other times - we might be able to offer something more.
+ > ÷
Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!
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08-13-2019 01:06 AM  7 months ago
thorhubbell

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Ithaca, NY -USA

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it sounds like the tail belt is slapping in the tail boom but I can't figure out why. I replaced the worn front tail pulley and it flew great for a day then the slapping started again.
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10-11-2019 12:20 PM  5 months ago
keiser BLADE

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WV USA

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💎Sustaining Member
Make sure your belt dont have too many twist , check teeth on belt alsoBrandon
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10-15-2019 10:29 PM  5 months ago
Jeff polisena

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westpalmbeachflorida usa

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Belt stretch , tighten again . After a flight or two look for any signs of rubbing , if none found then you should be good .I stole it ,flew it and gave it back ;)
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