Thread: Draughting.
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Old 07-13-2017, 10:03 AM   #1 (permalink)
JockoT
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Draughting.

While travelling from Edinburgh today I had an artic tractor trailer (semi), with an enormous bulldozer on the back, join the city bypass just ahead of me. He was accelerating fairly easily up to 50 mph so I felt comfortable slipping in behind him. That way I wasn't the stopper in the bottle.
What I found was a sweet spot, a comfortable distance behind him, where my mpg suddenly improved from around 50 mpg up to about 70 mpg. He was making a huge hole in the air, and because of his size I could benefit from it without getting so close that I was tailgating. I was easily two/three seconds behind him and he was still allowing me to throttle back and gain the mpg.

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