chillee
Active member
Anyone come across this before and know what the possible cause is. See the video I took (link below)
Video link
You can't hear the resonance on a mobile phone speaker (well not on mine). need headphones with a good bass. Or on my laptop I can just about hear it when I increase the revs in the video. But in real life it is very intrusive.
Basically it is a pulsating or oscillating deep/low noise. I can't hear it really below 2000 rpm. The noise seems to get louder with more revs but the oscillation period does not seem to increase.
Engine is all running fine.
Last weekend I had the noise on a run , on the way out and on the way back from New Town Creek.
Yesterday, I could not hear it at all on the way out, on the way back it materialised again, and was really very intrusive. From the video it does not sound too bad until you use headphones, then you can tell how much the resonance comes across over the top of the background engine noise.
Engine is a VP AD31P - with duoprop drive
Video link
You can't hear the resonance on a mobile phone speaker (well not on mine). need headphones with a good bass. Or on my laptop I can just about hear it when I increase the revs in the video. But in real life it is very intrusive.
Basically it is a pulsating or oscillating deep/low noise. I can't hear it really below 2000 rpm. The noise seems to get louder with more revs but the oscillation period does not seem to increase.
Engine is all running fine.
Last weekend I had the noise on a run , on the way out and on the way back from New Town Creek.
Yesterday, I could not hear it at all on the way out, on the way back it materialised again, and was really very intrusive. From the video it does not sound too bad until you use headphones, then you can tell how much the resonance comes across over the top of the background engine noise.
Engine is a VP AD31P - with duoprop drive