Twisted straps were singing in the wind

Anything taller than about 3 feet gets a twisted strap on the trailer. Have never had an issue

I ran two coils about 6 feet tall, chained them like normal but I threw a strap over the top because redundancy. However, the straps were still singing the whole ride. I put my whole 225lbs cinching them down.

Any idea why? Should I have done an extra twist on them? Is there such thing as too much twist?

 

Half twist is all it needs . Even when they get loose the twist keeps them from vibrating. Not sure how or why it works but it does. Are u using 4inch straps .? Or smaller ?

 

Yes 4 inch straps. They had the half twist on each side

 

Straight straps act like an airfoil. Hence vibration.

 

Yeah I had them twisted and I cranked them down with everything gravity and me could give. They were still flapping

 

Well you were going at highway speeds so yeah they still vibrate sometimes even twisted.

 

Too many twists will vibrate IME. I almost majored in aerospace engineering, but switched to systems engineering, so beyond that tidbit, I can’t help you.

 

Were they at an angle ? U said u secured a coil with them so u put strap directly across the rub rail or was it more diagonal across the coil?

 

Did you make sure the c shape of the twist is facing forward, ie into the wind.?
If the u shape is forward it will scoop the wind & vibrate..

When I put a half twist, put a click our 2 on the winch. Manipulate the strap by hand so C is into the wind, then give'er..

Zoom in, can see the rounded edge forward on all but the 4th one from the front.. I missed one, but low enough it didn't matter..

 

No angle, the strap went over the tallest point of the coil, in line with the center hole. I ran it inside the rub rail.