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
Dick_B wrote:
Nope, you are all wrong.
The real explanation is that the truck IS pushing air against the sides of the trailer and tow vehicle. BUT the least stable part of that assembly is between the trailer wheels and the hitch. When that part of the assembly is pushed away from the truck it tends to also move the back of the tow vehicle away from the truck which tends to turn the front of the tow vehicle TOWARDS the truck thus giving the impression of the truck sucking in the tow vehicle.
You're welcome.
Major difference between a shockwave in front of an object, the low pressure area created by the faster moving object, and the buffering when the trailing edge of that shock wave gets you (or even the draft created).
ALL of which tend to have YOU moving toward the passing vehicle whether you are causing it, or "lift" is causing it.
BUT.....to suggest that the wiggle point in the middle has that much affect.....would also suggest that a class A/B or even c has nothing to be concerned with.
Ask one of those guys.....even with no wiggle point....bet they get moved.
