theholycow |
07-16-2008 02:37 PM |
Feel the draft....FEEL the DRAFT!
I got on the highway as usual today, and there was an unusually large traffic quantity. Soon I entered the left lane in the large space between a large tractor towing a short shipping container and a sports car with 4 excessively bright headlights inexplicably turned on, actually managing to provide awful glare on a bright sunny day.
I found that the truck was steadily going about the speed I'd go, and was staying in the left lane instead of moving right as most truckers would do, so I decided I'd try to draft. I figured I'd need to draft closer than usual for such a short truck, and drafted at 1.5-2 seconds.
If you're familiar with containers on trucks, their bodies sit higher than a normal box trailer. The trailer is an independent frame that's pretty high to begin with, and the box sits on top of the frame. This particular one had an abnormally high frame. Looking at it I figured there wouldn't be a good draft since there was almost no truck down at my height, the bulk of it being higher than my hood.
I drafted him for what seemed like forever, until he seemed like he was getting out of my way, thinking I was tailgating pissed off. I felt bad for him, some jerk pulled out of the breakdown lane in front of him, nowhere near highway speed.
Anyway...here's what I noticed about the wind. I drive with my windows open, and usually at 70mph I have steady, comfortable wind. Behind this truck, I was getting rhythmically whacked in the head with bursts of air in a 1 second cycle. Was I in bad turbulence, or was I in a good draft?
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