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Depends on what you want to optimize....
Posted by TKC (more from TKC) on Tue, 24 Sep 2002 10:13:49
In Reply to: Most Economical Speed, Mat, Tue, 24 Sep 2002 06:12:35
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but I think all the posts are correct except many missed that the car is moving against air pressure, i.e. drag.
The drag force goes up rather quickly, say proportional to the square of your speed, even at moderate speed, e.g. between 40mph and 50mph, the difference can be significant.
Driving in 5th gear at the lowest possible speed without stalling the engine is probably closest to "optimal" if air resistance is not taken into consideration. This also means you are not going anywhere fast so that is a cost to you in terms of time (= money ??), so it may not be "efficient" in the big picture.
I take the attitude of driving at a speed that you are comfortable with without breaking the law. On the other hand, the 55MPH was as close to picking a number out of thin air approach, so that it was acceptable to the travelling public and truckers. It does save some gas at 55MPH comparing to doing 65MPH but not as much as 45MPH :-).
I'll now step down from my soapbox...
posted by 216.206.240...
Posts in this Thread:
- Most Economical Speed, Mat, Tue, 24 Sep 2002 06:12:35
- Re: Most Economical Speed -- Oh, THAT speed. . . ., JPW, Tue, 24 Sep 2002 18:14:08
- Depends on what you want to optimize...., TKC, Tue, 24 Sep 2002 10:13:49 <-- Viewing This Message
- Re: Most Economical Speed (Long), BrooksG, Tue, 24 Sep 2002 09:06:18
- the opposite of most exciting speed (i.e. slow in 5th), Aero'ed, Tue, 24 Sep 2002 08:55:44
- Re: Most Economical Speed, bRAD, Tue, 24 Sep 2002 08:09:26
- Re: Most Economical Speed, bRAD, Tue, 24 Sep 2002 08:06:47
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