Why do passing trucks suck instead of blow?
Nope, it's not the first line of a joke or a rhetorical question. I would expect a passing truck or bus to be pushing a wave of high pressure air in front and beside, but I've noticed time and agai...
Forum Discussion
Tension on the hitch rigging determines that. Slack is a problem. One big push is all it takes.
On a grade descent it's especially critical to control for the crosswinds, natural or man made. A close passing big truck in this stretch is dangerous. Literally.
With a VPP hitch I don't feel the big truck bow wave on the trailer. But I did as it reached the truck bed with cap. Added a rear antiroll bar where none existed and upsized the front to compensate. A Panhard Rod is next. Tire pressure on TV is according to load (inside vehicle manufacturer range) to maximize footprint. TT tire pressure is to sidewall max to resist sway and run coolest.
This trailer came from factory with shocks and suspension crossmembers. Low ride height. I'll likely find a way to increase wheel travel, preferably with independent suspension upgrade. Short of that, with spring equalizers that help the wheel travel problem. As a reference, an Airstream will slide sideways where a plastic box will roll over.
Today's trailers with high clearance for slides should control for winds underneath trailer body, IMO. Flexible side skirting would be my choice. Conveyor belting is one suggestion.
A truly aero trailer has crosswinds pulling at it as they cross over. A box allows wind pressure to pile up along the length, increasing in force. The greater amount of wind also passing below the TT exacerbates the problem. The TT is lifted as it is also pushed over.
On a grade descent it's especially critical to control for the crosswinds, natural or man made. A close passing big truck in this stretch is dangerous. Literally.
With a VPP hitch I don't feel the big truck bow wave on the trailer. But I did as it reached the truck bed with cap. Added a rear antiroll bar where none existed and upsized the front to compensate. A Panhard Rod is next. Tire pressure on TV is according to load (inside vehicle manufacturer range) to maximize footprint. TT tire pressure is to sidewall max to resist sway and run coolest.
This trailer came from factory with shocks and suspension crossmembers. Low ride height. I'll likely find a way to increase wheel travel, preferably with independent suspension upgrade. Short of that, with spring equalizers that help the wheel travel problem. As a reference, an Airstream will slide sideways where a plastic box will roll over.
Today's trailers with high clearance for slides should control for winds underneath trailer body, IMO. Flexible side skirting would be my choice. Conveyor belting is one suggestion.
A truly aero trailer has crosswinds pulling at it as they cross over. A box allows wind pressure to pile up along the length, increasing in force. The greater amount of wind also passing below the TT exacerbates the problem. The TT is lifted as it is also pushed over.
