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
Vulcan Rider wrote:wnjj wrote:
(A) This in turn accelerates the air to a higher speed within the "tube" which reduces the static pressure throughout the space between the vehicles.
(b) This is why there's a bow wake pushing you away followed by the suction pulling you in when another vehicle passes you.
(A) No it doesn't.
Your two statements above are in direct conflict with each other.
(B) UNTIL the overtaking big vehicle actually gets it's back end up to or slightly beyond your back end, the pressure wakes between the two are additive and you can't go fast enough to negate that.
This discussion is ridiculous. I quit.
Maybe you'll believe NASA. Figure 2
NASA wrote:
An example of Bernoulli's principle in the real world is a car passing by a truck. The wind rushing between the two vehicles acts like a venturi tube. Because the pressure is less between the two, the car is pushed toward the truck by air pressure on the other side of the car.
