From the speed discussions, trailer tires are rated for 65 mph unless otherwise noted. That is really not fast. Some may be M rated for 81 mph. If the trailer is near max load for the tires, I would try to stick to 60 mph. I used to work at a tire shop, and probably 70% of trailer tires that we replaced(the ones coming off, not going on!) had a tread separation or catastrophic failure from underinflation/excessive age. Treat them as you would with car tires, replace if 6 years or older, or if cracking badly/out of round, etc.
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Originally Posted by justinooo9
Does anyone have any data on those roof mounted wind deflectors? see them on big rigs but rarely on trucks pulling 5th wheels. I could fabricate one pretty easily and anyone can ask my wife I don't give a rats butt about what others think my truck looks like lol. shes nearly pristine for 20 yrs old.
I was thinking the wind deflector on my roof because the side my side may sit 1.5 higher on even my new trailer etc.
I didn't know how valid the picture attachment really was etc.
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The problem with the truck mounted wing is that it increases lift at the front of the trailer, less stability. I think hucho’s book has lift measurements. I’ll have to check.
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Originally Posted by aerohead
The original source included the drag coefficients for each configuration.I have it at PhotoBucket,but can no longer access any of it.
As to the deflectors,they need to be tuned,and do not lend themselves to just shooting from the hip.
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I’ve got hucho’s book on road vehicle aerodynamics, pretty sure it’s in there. I could look, but not until tomorrow.