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Old 09-24-2008, 01:06 PM   #88 (permalink)
whitevette
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Ground speed? Or, airspeed?

Quote:
Originally Posted by RH77 View Post
Well, I'd better comment since I brought-up the whole 55-deal...


I just drove 500 miles in an '09 Chevy Malibu 4-banger, 4-speed. With a constant tailwind of about 10-15 MPH, I got about 31 MPG at 70 MPH (speed limit). I sped up to 75 to outrun a thunderstorm, and the mileage average during that segment was ~28 MPG.

But the "fell asleep because it was too slow" argument doesn't sit right. Driving at 80 mph sleepy, seems to be the same as 55 to me. What about railroad engineers? They don't even have a steering wheel and tend to stay awake at speeds of 45 mph all day and night.



RH77
Hi, RH-
Let me make a quick observation here : You were running 70 MPH with a 15 MPH tailwind? Hmmm.... Does this not sound like 55 MPH in zero wind ? Einstein said
" Everything is relative." LOL

I agree with your RR engineer comparison. a tired trucker is a HEAVY menace to the rest of the driving world...even if he's going 30 MPH... in his 60,000 pound mass. He's any less of a danger at 80? Gimme a break.... Mass times velocity = momentum. Stop 60,00 pounds at 80 MPH?
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