i recently purchased a 48" low-profile LED lightbar for my truck as i am a volunteer firefighter. i got it for 350 on craigslist when their worth thousands of dollars new!
so heres my issue
i put it on (perminant mount) and its so secured to the roof that it makes little dimples in the reflection near the mounts so i know its SUPER secured. i was taking it for a test drive and i got over 50 mph and i heard this low pitched rumbling and i touched the roof of my truck and felt it vibrating at the same pitch as the sound
i thought that maybe the lightbar is tilted slightly backwards (like a reverse spoiler) and is catching air under it and wanting to lift off like a wing and will only vibrate when winds are over 50mph
could my bug-deflector on the front of the hood mess up my aerodynamics on the roof?
could i make some sort of a wind deflector or a spoiler to mount on the front and bottom of the lightbar to direct wind over it? like the front slope of a roof rack or a spoiler?
any ideas on aerodynamics?
any ideas at all?
***This is also posted in the Aftermarket Parts section***