Is going 55 mph really the best speed? - Toyota Yaris Forums

BEEF · 05-09-2011, 01:17 PM

looking at it strictly scientifically

I have seen graphs on aerodynamic drag that show there is a deflection point where drag increases sharply. the sharp increase is usually between 50 and 60 mph depending on the aerodynamics of the particular vehicle. I know I saw one that showed the optimum for a vehicle being 53MPH. I can't remember what vehicle was tested but I do remember it being old.

that may be where the whole 55MPH thing came from. it gives you the most speed for the least amount of drag.

there again, I may be reading way too much into the question.

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05-09-2011, 01:17 PM	#11
BEEF View User's Garage Drives: 2008 yaris 3d Join Date: Apr 2011 Location: north carolina Posts: 732	looking at it strictly scientifically I have seen graphs on aerodynamic drag that show there is a deflection point where drag increases sharply. the sharp increase is usually between 50 and 60 mph depending on the aerodynamics of the particular vehicle. I know I saw one that showed the optimum for a vehicle being 53MPH. I can't remember what vehicle was tested but I do remember it being old. that may be where the whole 55MPH thing came from. it gives you the most speed for the least amount of drag. there again, I may be reading way too much into the question.